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(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2016)
We present foreground-reduced cosmic microwave background (CMB) maps derived from the full Planck data set in both temperature and polarization. Compared to the corresponding Planck 2013 temperature sky maps, the total ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2016)
Using data from the Planck satellite, we study the statistical properties of interstellar dust polarization at high Galactic latitudes around the south pole (b < −60°). Our aim is to advance the understanding of the ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2013)
Observations of transition region emission lines reveal the presence of redshifts in lines formed from the top of the chromosphere up to temperatures of about 2.5 × 105 K and blueshifts for temperatures above that. However, ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2016)
We present the 8th full focal plane simulation set (FFP8), deployed in support of the Planck 2015 results. FFP8 consists of 10 fiducial mission realizations reduced to 18 144 maps, together with the most massive suite of ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2016)
We test the statistical isotropy and Gaussianity of the cosmic microwave background (CMB) anisotropies using observations made by the Planck satellite. Our results are based mainly on the full Planck mission for temperature, ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2016)
We study the implications of Planck data for models of dark energy (DE) and modified gravity (MG) beyond the standard cosmological constant scenario. We start with cases where the DE only directly affects the background ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2016)
Maps of cosmic microwave background (CMB) temperature and polarization from the 2015 release of Planck data provide the highestquality full-sky view of the surface of last scattering available to date. This enables us to ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2016)
We present the most significant measurement of the cosmic microwave background (CMB) lensing potential to date (at a level of 40σ), using temperature and polarization data from the Planck 2015 full-mission release. Using ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2016)
We present the Planck Catalogue of Galactic Cold Clumps (PGCC), an all-sky catalogue of Galactic cold clump candidates detected by Planck. This catalogue is the full version of the Early Cold Core (ECC) catalogue, which ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2014)
We test anisotropic dark energy models with the 7-year WMAP temperature observation data. In the presence of imperfect sources, large-scale gradients or anisotropies in the dark energy mean that the CMB sky will be distorted ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2016)
We present the all-sky Planck catalogue of Sunyaev-Zeldovich (SZ) sources detected from the 29 month full-mission data. The catalogue (PSZ2) is the largest SZ-selected sample of galaxy clusters yet produced and the deepest ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2016)
The Second Planck Catalogue of Compact Sources is a list of discrete objects detected in single-frequency maps from the full duration of the Planck mission and supersedes previous versions. It consists of compact sources, ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2016)
This paper presents cosmological results based on full-mission Planck observations of temperature and polarization anisotropies of the cosmic microwave background (CMB) radiation. Our results are in very good agreement ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2016)
We compute and investigate four types of imprint of a stochastic background of primordial magnetic fields (PMFs) on the cosmic microwave background (CMB) anisotropies: the impact of PMFs on the CMB temperature and polarization ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2017)
The 2014 March 29 X1 solar flare (SOL20140329T17:48) produced bright continuum emission in the far- and near-ultraviolet (NUV) and highly asymmetric chromospheric emission lines, providing long-sought constraints on the ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2020)
The present studies address feeding of plankton in turbulent environments, discussed by a comparison of analytical results and field data. Various models for predator-prey encounters and capture probabilities are reviewed. ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2014)
This paper describes the methods used to produce photometrically calibrated maps from the Planck High Frequency Instrument (HFI) cleaned, time-ordered information. HFI observes the sky over a broad range of frequencies, ...
(Journal article / Tidsskriftartikkel / AcceptedVersion; Peer reviewed, 2020)
The heating of the solar chromosphere and corona to the observed high temperatures, imply the presence of ongoing heating that balances the strong radiative and thermal conduction losses expected in the solar atmosphere. ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2008)
Conditional sampling methods are generalized by applying a matched-filter on the reference signal. This generalized method is illustrated by data obtained in a magnetized toroidal plasma without rotational transform. By ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2015)
© ESO, 2015
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2015)
© ESO, 2015
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2015)
© ESO, 2015
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2015)
© ESO, 2015
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2015)
© ESO, 2015
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2015)
© ESO, 2015
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2015)
© ESO, 2015
(Journal article / Tidsskriftartikkel / AcceptedVersion; Peer reviewed, 2012)
We consider issues related to the conformal mapping between the Einstein and Jordan frames in f(R) cosmology. We consider the impact of the conformal transformation on the gauge of a perturbed system and show that unless ...
(Journal article / Tidsskriftartikkel / AcceptedVersion; Peer reviewed, 2016)
The Euclid mission objective is to understand why the expansion of the Universe is accelerating through by mapping the geometry of the dark Universe by investigating the distance-redshift relationship and tracing the ...
(Journal article / Tidsskriftartikkel / AcceptedVersion; Peer reviewed, 2017)
We investigate the compatibility of the Symmetron with dark energy by introducing a non-minimal kinetic term associated with the Symmetron. In this new model, the effect of the friction term appearing in the equation of ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2016)
Reproduced with permission from Astronomy & Astrophysics, © ESO, 2016
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2018)
The Fe i 6173 Å line is widely used in the measurements of vector magnetic fields by instruments including the Helioseismic and Magnetic Imager (HMI). We perform non-local thermodynamic equilibrium calculations of this ...
(Journal article / Tidsskriftartikkel / AcceptedVersion; Peer reviewed, 2017)
An interaction between dark matter and dark energy, proportional to the product of their energy densities, results in a scaling behavior of the ratio of these densities with respect to the scale factor of the Robertson-Walker ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2014)
We developed a novel approach for fast and accurate ray-tracing of galaxies using procedural noise fields. Our method allows for efficient and realistic rendering of synthetic galaxy morphologies, where individual components ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2016)
Reproduced with permission from Astronomy & Astrophysics, © ESO, 2016
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2018)
We have identified new clusters and characterized previously unknown Planck Sunyaev–Zeldovich (SZ) sources from the first Planck catalogue of SZ sources (PSZ1). The results presented here correspond to an optical follow-up ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2017)
© 2017. The American Astronomical Society. All rights reserved.
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2018)
We present results from an observing campaign in support of the VAULT2.0 sounding rocket launch on 2014 September 30. VAULT2.0 is a Lyα (1216 Å) spectroheliograph capable of providing spectroheliograms at high cadence. Lyα ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2017)
© 2017. The American Astronomical Society. All rights reserved.
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2017)
© ESO, 2017
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2017)
© 2017 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2017)
Context. The solar coronal heating problem has been an open question in the science community since 1939. One of the proposed models for the transport and release of mechanical energy generated in the sub-photospheric ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2017)
© ESO, 2017
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2017)
We report the identification of extended Lyα nebulae at z ≃ 3.3 in the Hubble Ultra Deep Field (HUDF, ≃40 kpc × 80 kpc) and behind the Hubble Frontier Field galaxy cluster MACSJ0416 (≃40 kpc), spatially associated with ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2017)
© 2017 The Author(s) Published by Oxford University Press on behalf of the Royal Astronomical Society
SPATIAL VARIATIONS IN THE SPECTRAL INDEX OF POLARIZED SYNCHROTRON EMISSION IN THE 9 yr WMAP SKY MAPS
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2014)
We estimate the spectral index, β, of polarized synchrotron emission as observed in the 9 yr Wilkinson Microwave Anisotropy Probe sky maps using two methods, linear regression ("T-T plot") and maximum likelihood. We partition ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2017)
© 2017. The American Astronomical Society. All rights reserved.
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2011)
Oscillations with periods on the order of 5–10 min have been observed by instrumented spacecrafts in the Earth's magnetosphere. These oscillations often follow sudden impacts related to coronal mass ejections. It is ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2018)
A massive and luminous perturber moving across an opaque gas is subjected to a force different from the gravitational friction that it would experience if it were cold. The heat released by the perturber diffuses in the ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2014)
We study a granular-sized magnetic flux emergence event that occurred in NOAA 11024 in 2009 July. The observations were made with the CRISP spectropolarimeter at the Swedish 1 m Solar Telescope achieving a spatial resolution ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2015)
We present a mass estimate of the Planck-discovered cluster PLCK G100.2-30.4, derived from a weak lensing analysis of deep Subaru griz images. We perform a careful selection of the background galaxies using the multi-band ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2013)
We report the discovery of a unique gravitational lens system, SDSS J2222+2745, producing five spectroscopically confirmed images of a zs = 2.82 quasar lensed by a foreground galaxy cluster at zl = 0.49. We also present ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2015)
In this paper, we present the first results from implementing two scalar–tensor modified gravity theories, the symmetron and the Hu–Sawicki f(R)-gravity model, into a hydrodynamic N-body code with dark matter particles and ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2018)
Recent detections of Lyman alpha (Lyα) emission from z > 7.5 galaxies were somewhat unexpected given a dearth of previous non-detections in this era when the intergalactic medium (IGM) is still highly neutral. But these ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2015)
The Mg ii h&k doublet are two of the primary spectral lines observed by the Sun-pointing Interface Region Imaging Spectrograph (IRIS). These lines are tracers of the magnetic and thermal environment that spans from the ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2015)
We test for foreground residuals in the foreground-cleaned Planck cosmic microwave background (CMB) maps outside and inside the U73 mask commonly used for cosmological analysis. The aim of this paper is to introduce a new ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2012)
It is shown that extensions to general relativity, which introduce a strongly coupled scalar field, can be viable if the interaction has a nonconformal form. Such disformal coupling depends upon the gradients of the scalar ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2012)
We present the most general covariant ghost-free gravitational action in a Minkowski vacuum. Apart from the much studied f(R) models, this includes a large class of nonlocal actions with improved UV behavior, which ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2015)
We use coordinated observations with the Interface Region Imaging Spectrograph (IRIS) and the Swedish 1 m Solar Telescope to identify the disk counterpart of type II spicules in upper-chromospheric and transition region ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2015)
Transverse magnetohydrodynamic waves have been shown to be ubiquitous in the solar atmosphere and can, in principle, carry sufficient energy to generate and maintain the Sun's million-degree outer atmosphere or corona. ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2015)
The C ii 133.5 nm multiplet has been observed by NASA's Interface Region Imaging Spectrograph (IRIS) in unprecedented spatial resolution. The aims of this work are to characterize these new observations of the C ii lines, ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2015)
We present Chandra and XMM-Newton observations of PLCK G036.7+14.9 from the Chandra–Planck Legacy Program. The high resolution X-ray observations reveal two close (~72'' = 193 kpc in projection) subclusters, G036N and ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2015)
We analyze coordinated observations of coronal rain in loops, spanning chromospheric, transition region (TR), and coronal temperatures with sub-arcsecond spatial resolution. Coronal rain is found to be a highly multithermal ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2015)
We present a comprehensive method to analyze small-scale heating events in detail in a 3D magnetohydrodynamics simulation for quiet-Sun conditions. The method determines the number, volume, and some general geometric ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2012)
The bimetric variational principle is a subtle reinterpretation of general relativity that assumes the spacetime connection to be generated by an independent metric. Unlike the so-called Palatini formalism that promotes ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2014)
New Hubble Space Telescope ultraviolet and optical imaging of the strong-lensing galaxy cluster SDSS J1531+3414 (z = 0.335) reveals two centrally dominant elliptical galaxies participating in an ongoing major merger. The ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2015)
We revisit the problem of exact cosmic microwave background (CMB) likelihood and power spectrum estimation with the goal of minimizing computational costs through linear compression. This idea was originally proposed for ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2014)
Interface Region Imaging Spectrograph data allow us to study the solar transition region (TR) with an unprecedented spatial resolution of 0farcs33. On 2013 August 30, we observed bursts of high Doppler shifts suggesting ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2014)
We study properties of domain walls in the symmetron model, in which the scalar gravitational degree of freedom decouples from matter in regions of high density and exhibits a spontaneously broken Z2 symmetry at low ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2014)
New and advanced space-based observing facilities continue to lower the resolution limit and detect solar coronal loops in greater detail. We continue to discover even finer substructures within coronal loop cross-sections, ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2017)
There is a thin transition region (TR) in the solar atmosphere where the temperature rises from 10,000 K in the chromosphere to millions of degrees in the corona. Little is known about the mechanisms that dominate this ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2016)
We describe a new quiet-Sun phenomenon which we call quiet-Sun Ellerman-like brightenings (QSEB). QSEBs are similar to Ellerman bombs (EB) in some respects but differ significantly in others. EBs are transient brightenings ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2015)
We present polarization observations of two Galactic plane fields centered on Galactic coordinates (l, b) = (0°, 0°) and (329°, 0°) at both Q (43 GHz) and W bands (95 GHz), covering between 301 and 539 square degrees ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2015)
Spectroscopic observations of prominence eruptions associated with coronal mass ejections (CMEs), although relatively rare, can provide valuable plasma and three-dimensional geometry diagnostics. We report the first ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2013)
Cosmological perturbations due to statistical thermal fluctuations in a single fluid characterized by an arbitrary equation of state are computed. Formulas to predict the scalar and tensor perturbation spectra and ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2015)
Aims: We study the effects of letting dark matter and gas in the Universe couple to the scalar field of the symmetron model, a modified gravity theory, with varying coupling strength. We also search for a way to distinguish ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2015)
Modified gravity models require a screening mechanism to be able to evade the stringent constraints from local gravity experiments and, at the same time, give rise to observable astrophysical and cosmological signatures. ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2014)
Solar spicules have eluded modelers and observers for decades. Since the discovery of the more energetic type II, spicules have become a heated topic but their contribution to the energy balance of the low solar atmosphere ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2011)
We investigate whether there is any cosmological evidence for a scalar field with a mass and coupling to matter which change accordingly to the properties of the astrophysical system it “lives in,” without directly focusing ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2014)
We investigate the variation of the fine-structure constant, α, in symmetron models using N-body simulations in which the full spatial distribution of α at different redshifts has been calculated. In particular, we obtain ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2013)
The space-time evolution of an initial step-like plasma density variation is studied. We give particular attention to formulate the problem in a way that opens for the possibility of realizing the conditions experimentally. ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2012)
With reference to laboratory Q-machine studies we analyze the dynamics of a plasma diode under external forcing. Assuming a strong axial magnetic field, the problem is analyzed in one spatial dimension by a particle-in-cell ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2015)
Aims: We use advanced 3D non-local thermodynamic equilibrium radiative magnetohydrodynamic simulations of the solar atmosphere to carry out detailed tests of chromospheric diagnostics at millimeter and submillimeter ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2016)
As part of an all-sky follow-up of the Planck catalogue of Sunyaev-Zeldovich (SZ) cluster candidates detected in the first 14 months of data, we are observing cluster candidates in the southern sky in the optical imaging ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2016)
We report on a fan-shaped set of high-speed jets above a strongly magnetized light bridge (LB) of a sunspot observed in the Hα line. We study the origin, dynamics, and thermal properties of the jets using high-resolution ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2015)
Screened modified gravity predicts potentially large signatures in the peculiar velocity field that makes it an interesting probe to test gravity on cosmological scales. We investigate the signatures induced by the Symmetron ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2015)
Rapid magnetic up fl ows in the quiet-Sun photosphere were recently uncovered from both SUNRISE / IMaX and Hinode / SOT observations. Here, we study magnetic up flow events ( MUEs ) from high-quality, high- ( spatial, ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2015)
We report on observations of recurrent jets by instruments on board the Interface Region Imaging Spectrograph, Solar Dynamics Observatory (SDO), and Hinode spacecraft. Over a 4 hr period on 2013 July 21, recurrent coronal ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2015)
The asymmetries observed in the line profiles of solar flares can provide important diagnostics of the properties and dynamics of the flaring atmosphere. In this paper the evolution of the Hα and Ca ii λ8542 lines are ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2015)
Spicules are ubiquitous, fast moving jets observed off-limb in chromospheric spectral lines. Combining the recently launched Interface Region Imaging Spectrograph with the Solar Dynamics Observatory and Hinode, we have a ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2015)
Observations of the solar chromosphere in the line core of the Hα line show dark elongated structures called fibrils that show swaying motion. We performed a three-dimensional radiation-MHD simulation of a network region ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2013)
In the first-order formalism of gravitational theories, the spacetime connection is considered as an independent variable to vary together with the metric. However, the metric still generates its Levi-Civita connection ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2015)
Ellerman bombs are transient brightenings of the wings of the solar Balmer lines that mark reconnection in the photosphere. Ellerman noted in 1917 that he did not observe such brightenings in the Na i D and Mg i b lines. ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2017)
The Chromospheric Lyman-Alpha Spectro-Polarimeter is a sounding rocket experiment that has provided the first successful measurement of the linear polarization produced by scattering processes in the hydrogen Lyα line ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2014)
Several extensions of the standard cosmological model include scalar fields as new degrees of freedom in the underlying gravitational theory. A particular class of these scalar field theories include screening mechanisms ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2014)
We revisit the question of hemispherical power asymmetry in the WMAP and Planck temperature sky maps by measuring the local variance over the sky and on disks of various sizes. For the 2013 Planck sky map we find that none ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2015)
Spectral observations of the solar transition region (TR) and corona show broadening of spectral lines beyond what is expected from thermal and instrumental broadening. The remaining non-thermal broadening is significant ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2014)
We present a multi-level solver for drawing constrained Gaussian realizations or finding the maximum likelihood estimate of the cosmic microwave background sky, given noisy sky maps with partial sky coverage. The method ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2015)
In addition to primary fluctuations, cosmic microwave background (CMB) temperature maps contain a wealth of additional information in the form of secondary anisotropies. However, secondary effects that can be identified ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2015)
We measure [C iii] 1907, C iii] 1909 Å emission lines in 11 gravitationally lensed star-forming galaxies at z ~ 1.6–3, finding much lower equivalent widths than previously reported for fainter lensed galaxies. While it is ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2014)
Aims: We investigate the gravitational redshift in clusters of galaxies in the symmetron and Hu-Sawicky f(R) models. The characteristic feature of both models is the screening mechanism that hides the fifth force in dense ...