Now showing items 554-573 of 617

  • Berntsen, Bård Eirik (Master thesis / Masteroppgave, 2009)
  • Markel, Evan Benjamin Edmund (Master thesis / Masteroppgave, 2016)
    The Planck Sunyaev-Zeldovich Cluster catalogue provides an all-sky set of SZ detected galaxy clusters, which is the first of its kind. SZ signals are independent of redshift which allows a greater volume of space to be ...
  • Stepan, Jiri; Trujillo Bueno, J.; Belluzzi, Luca; Asensio Ramos, A.; Manso Sainz, R.; del Pino Aleman, T.; Casini, Roberto; Kano, Ryouhei; Winebarger, Amy R.; Auchère, Frédéric; Ishikawa, Ryohko; Narukage, Noriyuki; Kobayashi, Ken; Bando, Takamasa; Katsukawa, Yukio; Kubo, Masahito; Ishikawa, Shin'nosuke; Giono, Gabriel; Hara, Hirohisa; Suematsu, Yoshinori; Shimizu, Toshifumi; Sakao, Taro; Tsuneta, Saku; Ichimoto, Kiyoshi; Cirtain, Jonathan W.; Champey, Patrick R.; De Pontieu, Bart Walter; Carlsson, Mats (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2018)
    On 2015 September 3, the Chromospheric Lyman-Alpha SpectroPolarimeter (CLASP) successfully measured the linear polarization produced by scattering processes in the hydrogen Lyα line of the solar disk radiation, revealing ...
  • van der Burg, Remco F.J.; McGee, Sean; Aussel, Hervé; Dahle, Håkon; Arnaud, Monique; Pratt, Gabriel W.; Muzzin, Adam (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2018)
    We study the abundance of star-forming and quiescent galaxies in a sample of 21 clusters at 0.5 <  z <  0.7, detected with the Planck satellite. Thanks to the large volume probed by Planck, these systems are extremely ...
  • Sharon, Keren; Bayliss, Matthew B.; Dahle, Håkon; Dunham, Samuel J.; Florian, Michael K.; Gladders, Michael D.; Johnson, Traci L.; Mahler, Guillaume; Paterno-Mahler, Rachel; Rigby, Jane R.; Whitaker, Katherine E.; Akhshik, Mohammad; Koester, Benjamin P.; Murray, Katherine; Remolina González, Juan David; Wuyts, Eva (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2020)
    We present strong gravitational lensing models for 37 galaxy clusters from the Sloan Digital Sky Survey Giant Arcs Survey. We combine data from multi-band Hubble Space Telescope Wide Field Camera 3 (WFC3) imaging, with ...
  • Davis, A.-C.; Li, Baojiu; Mota, David; Winther, Hans Arnold (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2012)
    Scalar fields, strongly coupled to matter, can be present in nature and still be invisible to local experiments if they are subject to a screening mechanism. The symmetron is one such mechanism that relies on restoration ...
  • Quintero Noda, C.; Uitenbroek, Han; Carlsson, Mats; Orozco Suarez, D.; Katsukawa, Y.; Shimizu, T.; Ruiz Cobo, B.; Kubo, M.; Oba, T.; Kawabata, Y.; Hasegawa, T.; Ichimoto, K.; Anan, T.; Suematsu, Y. (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2018)
    The next generation of solar observatories aim to understand the magnetism of the solar chromosphere. Therefore, it is crucial to understand the polarimetric signatures of chromospheric spectral lines. For this purpose, ...
  • Carlsson, Kristin Charlotte (Master thesis / Masteroppgave, 2008)
    Observations of how matter is distributed on different length scales in the universe are an important test of cosmological models. For example, such observations can give an upper limit for the mass of neutrinos: As the ...
  • Wedemeyer, Sven; Szydlarski, Mikolaj Marcin; Jafarzadeh, Shahin; Eklund, Henrik; Guevara Gomez, Juan Camilo; Bastian, Tim; Fleck, Bernhard; de la Cruz Rodriguez, Jaime; Rodger, Andrew; Carlsson, Mats (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2020)
    Context. The Atacama Large Millimeter/submillimeter Array (ALMA) started regular observations of the Sun in 2016, first offering receiver Band 3 at wavelengths near 3 mm (100 GHz) and Band 6 at wavelengths around 1.25 mm ...
  • Rivera-Thorsen, Thøger Emil Juul; Dahle, Håkon; Gronke, Max Balthasar; Bayliss, M; Rigby, J. R.; Simcoe, R; Bordoloi, Rongmon; Turner, M.; Furesz, G (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2017)
    We present rest-frame ultraviolet and optical spectroscopy of the brightest lensed galaxy yet discovered, at redshift z = 2.4. The source reveals a characteristic triple-peaked Lyman α profile that has been predicted in ...
  • Smith, Matthew C.; Sijacki, Debora; Shen, Sijing (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2018)
    While feedback from massive stars exploding as supernovae (SNe) is thought to be one of the key ingredients regulating galaxy formation, theoretically it is still unclear how the available energy couples to the interstellar ...
  • Nobrega-Siverio, Daniel; Martinez-Sykora, Juan; Moreno-Insertis, F.; Rouppe van der Voort, Luc (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2017)
    © 2017. The American Astronomical Society. All rights reserved.
  • Honardoost, M.; Mota, David; Sepangi, H. R. (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 ...
  • Seljebotn, Dag Sverre; Eriksen, Hans Kristian Kamfjord (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2016)
    We present SymPix, a special-purpose spherical grid optimized for efficiently sampling rotationally invariant linear operators. This grid is conceptually similar to the Gauss–Legendre (GL) grid, aligning sample points with ...
  • Olluri, Kosovare; Gudiksen, Boris Vilhelm; Hansteen, Viggo; De Pontieu, Bart Walter (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2015)
    In recent years realistic 3D numerical models of the solar atmosphere have become available. The models attempt to recreate the solar atmosphere and mimic observations in the best way, in order to make it possible to couple ...
  • Oppegaard, Christine (Master thesis / Masteroppgave, 2007)
    Gravitational lensing has played an important role in cosmology since the discovery of the first gravitational lensing system in 1979 (Walsh et al.), where the quasar QSO 0957+561 can be seen in two images. Such multiple ...
  • Mota, David; Salzano, Vincenzo; Capozziello, S. (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 ...
  • Axelsson, Magnus; Ihle, Håvard Tveit; Scodeller, Sandro; Hansen, Frode Kristian (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 ...
  • Nadathur, Seshadri; Percival, Will J.; Beutler, Florian; Winther, Hans Arnold (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2020)
  • Llinares, Claudio (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2018)
    The dynamics of globular clusters has been studied in great detail in the context of general relativity as well as with modifications of gravity that strongly depart from the standard paradigm such as Modified Newtonian ...