Now showing items 455-474 of 516

  • Kuridze, D.; de Jorge Henriques, Vasco Manuel; Mathioudakis, M.; Rouppe van der Voort, Luc; de la Cruz Rodriguez, Jaime; Carlsson, Mats (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2018)
    We study the M1.9-class solar flare SOL2015-09-27T10:40 UT using high-resolution full Stokes imaging spectropolarimetry of the Ca ii 8542 Å line obtained with the CRISP imaging spectropolarimeter at the Swedish 1-m Solar ...
  • Selj, Josefine Helene (Master thesis / Masteroppgave, 2007)
  • Kuridze, D.; de Jorge Henriques, Vasco Manuel; Mathioudakis, M.; Koza, J.; Zaqarashvili, T. V.; Rybak, J; Hanslmeier, A.; Keenan, F. P. (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2017)
    © 2017. The American Astronomical Society. All rights reserved.
  • Sapa, Stharporn; Karwan, Khamphee; Mota, David (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2018)
    We investigate the effects of a disformal coupling between dark energy and dark matter in the predictions of the spherical collapse and its signatures in galaxy cluster number counts. We find that the disformal coupling ...
  • Nielsen, Robert (Master thesis / Masteroppgave, 2011)
    This thesis is a study of the dynamics and virialization of cosmic structures in the framework of flat cosmological models where the properties of the dark energy component plays an important role in the global and local ...
  • Nafstad, Halvor (Master thesis / Masteroppgave, 2019)
    Late time accelerated expansion of the universe is usually considered to be the result of dark energy, and the standard model of cosmology implements the cosmological constant as the drive of the acceleration of the universe. ...
  • Spicules 
    Bjølseth, Silje (Master thesis / Masteroppgave, 2008)
    The solar chromosphere has previously been thought to be a homogenic layer of the solar atmosphere, but better observations have made it evident that the chromosphere is a highly dynamic area. Spicules are structures ...
  • Skorbakk, Ine (Master thesis / Masteroppgave, 2010)
    In this thesis the correlation between star formation and dynamical state of a statistical well defined selection of galaxy clusters have been studied. From simulations and theory it is expected strong correlations between ...
  • 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 ...
  • 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 ...
  • 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 ...