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Now showing items 301-400 of 1111
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2022)
We present a validation of the Dark Energy Survey Year 3 (DES Y3) 3×2-point analysis choices by testing them on Buzzard2.0, a new suite of cosmological simulations that is tailored for the testing and validation of combined ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2022)
We consider the use of propagating kink waves, such as those observed by the Coronal Multi-channel Polarimeter, as a diagnostic technique. The transverse structuring of the plasma may be inferred by the frequency-dependent ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2022)
We present a tomographic weak lensing analysis of the Kilo Degree Survey Data Release 4 (KiDS-1000), using a new pseudo angular power spectrum estimator (pseudo- C ℓ ) under development for the ESA Euclid mission. Over ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2022)
The chromosphere is one of the most complex and dynamic layers of the solar atmosphere. The dynamic phenomena occur on different spatial and temporal scales, not only in active regions but also in the so-called quiet Sun. ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2022)
Abstract
We present the first Mg ii slit-raster spectra from the Interface Region Imaging Spectrograph (IRIS) that fully capture the genesis and coronal-jet-generating eruption of a central-disk solar minifilament. ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2022)
Abstract
One strong magnetic cloud (MC) with a magnetic field magnitude reaching ∼40 nT at 1 au during 2012 June 16–17 is examined in association with a preexisting magnetic flux rope (MFR) identified on the Sun. ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2022)
Abstract. It is argued that a simple model based on magnetic image arguments suffices to give a convincing insight into both the basic static as well as some transient dynamic properties of the near-Earth's magnetosphere, ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2022)
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2022)
ABSTRACT
Gravitational time delays provide a powerful one-step measurement of H0, independent of all other probes. One key ingredient in time-delay cosmography are high-accuracy lens models. Those are currently ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2022)
The stable pseudo-scalar degree of freedom of the quadratic Poincaré Gauge theory of gravity is shown to be a suitable dark matter candidate. We find the parameter space of the theory which can account for all the predicted ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2022)
We present ZodiPy, a modern and easy-to-use Python package for modeling the zodiacal emission seen by an arbitrary Solar System observer, which can be used for the removal of both thermal emission and scattered sunlight ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2022)
ABSTRACT
Strongly lensed quadruply imaged quasars (quads) are extraordinary objects. They are very rare in the sky and yet they provide unique information about a wide range of topics, including the expansion ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2022)
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2022)
ABSTRACT
We study the optical gri photometric variability of a sample of 190 quasars within the SDSS Stripe 82 region that have long-term photometric coverage during ∼1998−2020 with SDSS, PanSTARRS-1, the Dark ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2022)
Aims. We examine the movements of mass elements within dense fibrils using passive tracer particles (corks) in order to understand the creation and destruction processes of fibrils.
Methods. Simulated fibrils were ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2022)
Euclid will be the first space mission to survey most of the extragalactic sky in the 0.95–2.02 µm range, to a 5 σ point-source median depth of 24.4 AB mag. This unique photometric dataset will find wide use beyond Euclid’s ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2022)
Coronal bright points (CBPs) are ubiquitous structures in the solar atmosphere composed of hot small-scale loops observed in extreme-ultraviolet (EUV) or X-rays in the quiet Sun and coronal holes. They are key elements to ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2022)
The Complete Calibration of the Color–Redshift Relation survey (C3R2) is a spectroscopic program designed to empirically calibrate the galaxy color–redshift relation to the Euclid depth (IE = 24.5), a key ingredient for ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2022)
We present a cosmological analysis using the second and third moments of the weak lensing mass (convergence) maps from the first three years of data (Y3) data of the Dark Energy Survey. The survey spans an effective area ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2022)
Abstract How filaments form and erupt are topics about which solar researchers have wondered for more than a century and they are still open to debate. We present observations of a filament formation, its failed eruption, ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2022)
ABSTRACT
As part of the cosmology analysis using Type Ia Supernovae (SN Ia) in the Dark Energy Survey (DES), we present photometrically identified SN Ia samples using multiband light curves and host galaxy ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2022)
The Atacama Large Millimeter/sub-millimeter Array (ALMA) has provided us with an excellent diagnostic tool for studies of the dynamics of the Solar chromosphere, albeit through a single receiver band at one time presently. ...
(Journal article / Tidsskriftartikkel / AcceptedVersion; Peer reviewed, 2022)
The Atacama Large Aperture Submillimeter Telescope (AtLAST) is a concept for a 50m class single-dish telescope that will provide high sensitivity, fast mapping of the (sub-)millimeter sky. Expected to be powered by renewable ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2022)
Context. Radiative losses in the chromosphere are very important for the energy balance of the Sun. There have been efforts to make simple lookup tables for chromospheric radiative losses in the quiet Sun. During solar ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2022)
The CMB lensing signal from cosmic voids and superclusters probes the growth of structure in the low-redshift cosmic web. In this analysis, we cross-correlated the Planck CMB lensing map with voids detected in the Dark ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2022)
Context. Small-scale processes are thought to be important for the dynamics of the solar atmosphere. While numerical resolution fundamentally limits their inclusion in magnetohydronamic (MHD) simulations, real observations ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2022)
ABSTRACT
Type Ia supernovae (SNe Ia) are used as standardizable candles to measure cosmological distances, but differences remain in their corrected luminosities which display a magnitude step as a function of ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2022)
The magnetic field governs the corona; hence, it is a crucial parameter to measure. Unfortunately, existing techniques for estimating its strength are limited by strong assumptions and limitations. These techniques include ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2022)
Abstract
The Solar Dynamics Observatory (SDO), a NASA multispectral decade-long mission that has been daily producing terabytes of observational data from the Sun, has been recently used as a use case to demonstrate ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2022)
ABSTRACT
Standard sirens (SS) are the gravitational wave analogue of the astronomical standard candles, and can provide powerful information about the dynamics of the Universe up to very high z values. In this ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2022)
Abstract
The CLASP2 (Chromospheric LAyer Spectro-Polarimeter 2) sounding rocket mission was launched on 2019 April 11. CLASP2 measured the four Stokes parameters of the Mg ii
h and k spectral region ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2022)
The outer atmosphere of the Sun is composed of plasma heated to temperatures well in excess of the visible surface. We investigate short cool and warm (<1 MK) loops seen in the core of an active region to address the role ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2022)
The problem of bias, meaning over- or under-estimation, of the component perpendicular to the line-of-sight [B⊥] in vector magnetic-field maps is discussed. Previous works on this topic have illustrated that the problem ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2022)
We present and characterize the galaxy-galaxy lensing signal measured using the first three years of data from the Dark Energy Survey (DES Y3) covering 4132 deg2. These galaxy-galaxy measurements are used in the DES Y3 ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2022)
ABSTRACT
We measure the velocity dispersions of clusters of galaxies selected by the red-sequence Matched-filter Probabilistic Percolation (redMaPPer) algorithm in the first three years of data from the Dark ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2022)
The current and future cosmic microwave background (CMB) experiments fielding kilopixel arrays of transition-edge sensor (TES) bolometers require accurate and robust gain calibration methods. We simplify and refactor the ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2022)
Using the first three years of data from the Dark Energy Survey (DES), we use ratios of small-scale galaxy-galaxy lensing measurements around the same lens sample to constrain source redshift uncertainties, intrinsic ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2022)
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2022)
We present constraints on the tensor-to-scalar ratio r using a combination of BICEP/Keck 2018 (BK18) and Planck PR4 data allowing us to fit for r consistently with the six parameters of the ΛCDM model. We discuss the ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2022)
Abstract
The statistical power of weak lensing measurements is principally driven by the number of high-redshift galaxies whose shapes are resolved. Conventional wisdom and physical intuition suggest this is ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2022)
In recent decades our understanding of solar active regions (ARs) has improved substantially due to observations made with better angular resolution and wider spectral coverage. While prior AR observations have shown that ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2022)
Euclid is a mission of the European Space Agency that is designed to constrain the properties of dark energy and gravity via weak gravitational lensing and galaxy clustering. It will carry out a wide area imaging and ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2022)
On 2019 August 14 at 21:10:39 UTC, the LIGO/Virgo Collaboration (LVC) detected a possible neutron star–black hole merger (NSBH), the first ever identified. An extensive search for an optical counterpart of this event, ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2022)
We present a method for fast evaluation of the covariance matrix for a two-point galaxy correlation function (2PCF) measured with the Landy–Szalay estimator. The standard way of evaluating the covariance matrix consists ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2022)
In this paper, we present results from spontaneous ignition of aluminium particle clouds in a series of shock tube experiments. For all experiments, the shock propagates along a narrow pile of 40-μm aluminium particles. ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2022)
We present results from the first public data release of the MaNGA-ARO Survey of CO Targets (MASCOT), focusing our study on galaxies whose star formation rates and stellar masses place them below the ridge of the star-forming ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2022)
The Euclid mission – with its spectroscopic galaxy survey covering a sky area over 15 000 deg 2 in the redshift range 0.9 < z < 1.8 – will provide a sample of tens of thousands of cosmic voids. This paper thoroughly ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2022)
ABSTRACT
We use stacked spectra of the host galaxies of photometrically identified Type Ia supernovae (SNe Ia) from the Dark Energy Survey (DES) to search for correlations between Hubble diagram residuals and the ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2022)
Abstract
Why the atmosphere of the Sun is orders of magnitudes hotter than its surface is a long standing question in solar physics. Over the years, many studies have looked at the potential role of magnetohydrodynamic ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2022)
The Atacama Large Millimeter/submillimeter Array (ALMA) offers new diagnostic possibilities that complement other commonly used diagnostics for the study of the Sun. In particular, ALMA’s ability to serve as an essentially ...
(Journal article / Tidsskriftartikkel / AcceptedVersion; Peer reviewed, 2022)
The Cosmology Large Angular Scale Surveyor (CLASS) is a polarization-sensitive telescope array located at an altitude of 5,200 m in the Chilean Atacama Desert. CLASS is designed to measure “E-mode” (even parity) and “B-mode” ...
(Journal article / Tidsskriftartikkel / AcceptedVersion; Peer reviewed, 2022)
Polarization modulation is a powerful technique to increase the stability of measurements by enabling the distinction of a polarized signal from dominant slow system drifts and unpolarized foregrounds. Furthermore, when ...
(Journal article / Tidsskriftartikkel / AcceptedVersion; Peer reviewed, 2022)
We present new wide field survey strategies for Chilean Large Aperture Telescopes (LAT) measuring the Cosmic Microwave Background (CMB), which we call Sinusoidal Modulated High Cadence Survey Strategies. The strategies ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2022)
Abstract
We analyze spectra of a gravitationally lensed galaxy, known as the Sunburst Arc, that is leaking ionizing photons, also known as the Lyman continuum (LyC). Magnification from gravitational lensing permits ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2022)
ABSTRACT
We evaluate the consistency between lensing and clustering based on measurements from Baryon Oscillation Spectroscopic Survey combined with galaxy–galaxy lensing from Dark Energy Survey (DES) Year 3, ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2022)
Fully 3D cosmological simulations of scalar field dark matter with self-interactions, also known as Bose-Einstein condensate dark matter, are performed using a set of effective hydrodynamic equations. These are derived ...
(Journal article / Tidsskriftartikkel / AcceptedVersion; Peer reviewed, 2022)
The Cosmology Large Angular Scale Surveyor (CLASS) is a telescope array observing the Cosmic Microwave Background (CMB) at frequency bands centered near 40, 90, 150, and 220 GHz. CLASS measures the CMB polarization on the ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2022)
We report on the changing-look nature of the active galactic nucleus (AGN) in the galaxy NGC 4156, which was serendipitously discovered thanks to data acquired in 2019 at the Telescopio Nazionale Galileo (TNG) during a ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2022)
Context. Short-lived (100 s or less), sub-arcsec to a couple of arcsec sized features of enhanced brightenings in the narrowband images at the H 2V and K 2V positions of the Ca II H&K lines in the quiet Sun are known ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2022)
Cosmological models beyond ΛCDM, such as those featuring massive neutrinos or modifications of gravity, often display a characteristic change (scale-dependent suppression or enhancement) in the matter power spectrum when ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2022)
Pair-instability supernovae are theorized supernovae that have not yet been observationally confirmed. They are predicted to exist in low-metallicity environments. Because overall metallicity becomes lower at higher ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2022)
ABSTRACT
Cosmological analyses of samples of photometrically identified type Ia supernovae (SNe Ia) depend on understanding the effects of ‘contamination’ from core-collapse and peculiar SN Ia events. We employ ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2022)
We present a strong-lensing analysis of the cluster PSZ1 G311.65−18.48, based on Hubble Space Telescope imaging, archival VLT/MUSE spectroscopy, and Chandra X-ray data. This cool-core cluster (z = 0.443) lenses the brightest ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2022)
ABSTRACT
The velocity profile of galaxies around voids is a key ingredient for redshift space distortion (RSD) measurements made using the void–galaxy correlation function. In this paper, we use simulations to ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2022)
We present measurements of the anisotropic cross-correlation of galaxies and cosmic voids in data from the Sloan Digital Sky Survey (SDSS) Main Galaxy Sample, Baryon Oscillation Spectroscopic Survey (BOSS), and extended ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2022)
Context. Magnetic reconnection in the quiet Sun is a phenomenon that is consistently observed, however, its conditions of occurrence are not as well known as for more energetic events. It has recently become feasible to ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2022)
ABSTRACT
We compare the two largest galaxy morphology catalogues, which separate early- and late-type galaxies at intermediate redshift. The two catalogues were built by applying supervised deep learning ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2022)
ABSTRACT
Recent cosmological analyses rely on the ability to accurately sample from high-dimensional posterior distributions. A variety of algorithms have been applied in the field, but justification of the ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2022)
Cosmological analyses with type Ia supernovae (SNe Ia) often assume a single empirical relation between colour and luminosity (β) and do not account for varying host-galaxy dust properties. However, from studies of dust ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2022)
ABSTRACT
We report the discovery and characterization of high-speed (&gt;100 km s−1) horizontal flows in solar active regions, making use of the Sun-as-a-star spectroscopy in the range 5–105 nm provided by ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2022)
ABSTRACT
Numerical models of solar flares typically focus on the behaviour of directly heated flare models, adopting magnetic-field-aligned, plane-parallel methodologies. With high spatial- and spectral-resolution ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2022)
Abstract
The Jupiter Trojans are a large group of asteroids that are coorbiting with Jupiter near its L4 and L5 Lagrange points. The study of Jupiter Trojans is crucial for testing different models of planet ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2022)
We present a sample of 706, z < 1.5 active galactic nuclei (AGNs) selected from optical photometric variability in three of the Dark Energy Survey (DES) deep fields (E2, C3, and X3) over an area of 4.64 deg2. We construct ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2022)
ABSTRACT
We consider the behaviour of Alfvén waves propagating in a medium with random density perturbations. The imposed density perturbations have a broad-band spectrum and their characteristic spatial scale ...
(Journal article / Tidsskriftartikkel / AcceptedVersion; Peer reviewed, 2022)
The Wide-Area Linear Optical Polarimeter (WALOP)-South instrument is an upcoming wide-field and high accuracy optical polarimeter to be used as a survey instrument for carrying out the Polar-Areas Stellar Imaging in ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2022)
ABSTRACT
Many astrophysical and terrestrial scenarios involving magnetic fields can be approached in axial geometry. Although the smoothed particle hydrodynamics (SPH) technique has been successfully extended to ...
(Journal article / Tidsskriftartikkel / AcceptedVersion; Peer reviewed, 2022)
Two unique wide-field and high-accuracy polarimeters named WALOP (Wide-Area Linear Optical Polarimeter)- North and WALOP-South are currently under development at the Inter-University Center for Astronomy and Astrophysics ...
(Journal article / Tidsskriftartikkel / AcceptedVersion; Peer reviewed, 2022)
The Cosmology Large Angular Scale Surveyor (CLASS) telescope array surveys 75% of the sky from the Atacama desert in Chile at frequency bands centered near 40, 90, 150, and 220 GHz. CLASS measures the largest-angular scale ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2022)
Context. The Euclid mission is expected to discover thousands of z > 6 galaxies in three deep fields, which together will cover a ∼50 deg 2 area. However, the limited number of Euclid bands (four) and the low availability ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2022)
ABSTRACT
Recent analyses have found intriguing correlations between the colour (c) of type Ia supernovae (SNe Ia) and the size of their ‘mass-step’, the relationship between SN Ia host galaxy stellar mass (Mstellar) ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2022)
ABSTRACT
We present a method for mapping variations between probability distribution functions and apply this method within the context of measuring galaxy redshift distributions from imaging survey data. This ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2022)
Context. Magnetic reconnection in the deep solar atmosphere can give rise to enhanced emission in the Balmer hydrogen lines, a phenomenon referred to as Ellerman bombs. Recent high-quality Hβ observations indicate that ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2021)
Galactic outflows are known to consist of several gas phases; however, the connection between these phases has been investigated little and only in a few objects. In this paper, we analyse Multi Unit Spectroscopic Explorer ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2021)
We study the impact of active galactic nuclei (AGN) ionised outflows on star formation in high-redshift AGN host galaxies, by combining near-infrared integral field spectroscopic (IFS) observations, mapping the H α emission ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2021)
ABSTRACT
The forward fitting of solar flare observations with radiation–hydrodynamic simulations is a common technique for learning about energy deposition and atmospheric evolution during these explosive events. ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2021)
We constrain the spectral index of polarized synchrotron emission, β s , by correlating the recently released 2.3 GHz S -Band Polarization All Sky Survey ( S -PASS) data with the 23 GHz 9-year Wilkinson Microwave Anisotropy ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2021)
We present ultraviolet to near infrared spectroscopic observations of the quasar SDSS J001514+184212 and its proximate molecular absorber at z = 2.631. The [O III] emission line of the quasar is composed of a broad (FWHM ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2021)
The solar photosphere and the outer layer of the Sun’s interior are characterized by convective motions, which display a chaotic and turbulent character. In this work, we evaluated the pseudo-Lyapunov exponents of the ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2021)
ABSTRACT
Generative adversarial networks (GANs) have been recently applied as a novel emulation technique for large-scale structure simulations. Recent results show that GANs can be used as a fast and efficient ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2021)
We investigate potential gains in cosmological constraints from the combination of galaxy clustering and galaxy-galaxy lensing by optimizing the lens galaxy sample selection using information from Dark Energy Survey (DES) ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2021)
If a single line of sight (LOS) intercepts multiple dust clouds with different spectral energy distributions and magnetic field orientations, then the frequency scaling of each of the Stokes Q and U parameters of the thermal ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2021)
Context. Solar coronal loops are commonly subject to oscillations. Observations of coronal oscillations are used to infer physical properties of the coronal plasma using coronal seismology.
Aims. Excitation and evolution ...
(Journal article / Tidsskriftartikkel / AcceptedVersion; Peer reviewed, 2021)
Thanks to the release of the extraordinary EHT image of shadow attributed to the M87* supermassive black hole (SMBH), we have a novel window to assess the validity of fundamental physics in the strong-field regime. Motivated ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2021)
Abstract The Interface Region Imaging Spectrograph (IRIS) has been obtaining near- and far-ultraviolet images and spectra of the solar atmosphere since July 2013. IRIS is the highest resolution observatory to provide ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2021)
Aims. We investigate the contribution of shot-noise and sample variance to uncertainties in the cosmological parameter constraints inferred from cluster number counts, in the context of the Euclid survey.
Methods. By ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2021)
Routine ultraviolet imaging of the Sun’s upper atmosphere shows the spectacular manifestation of solar activity; yet, we remain blind to its main driver, the magnetic field. Here, we report unprecedented spectropolarimetric ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2021)
The importance of the chromosphere in the mass and energy transport within the solar atmosphere is now widely recognized. This review discusses the physics of magnetohydrodynamic waves and instabilities in large-scale ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2021)
We present constraints on the tensor-to-scalar ratio r using Planck data. We use the latest release of Planck maps, processed with the NPIPE code, which produces calibrated frequency maps in temperature and polarisation ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2021)
The simplest ΛCDM model provides a good fit to a large span of cosmological data but harbors large areas of phenomenology and ignorance. With the improvement of the number and the accuracy of observations, discrepancies ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2021)
Non-Gaussian (NG) statistics of the thermal Sunyaev-Zeldovich (tSZ) effect carry significant information which is not contained in the power spectrum. Here, we perform a joint Fisher analysis of the tSZ power spectrum and ...