Now showing items 683-702 of 731

  • hong, Jie; Li, Ying; Ding, M. D.; Carlsson, Mats (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2019)
    The solar Lyα line is the strongest line in the ultraviolet waveband, and is greatly enhanced during solar flares. Here we present radiative hydrodynamic simulations of solar flares under different heating models, and ...
  • Hagala, Robert; Llinares, Claudio; Mota, David (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2019)
    Context: There are currently no reliable methods to measure the transverse velocities of galaxies. This is an important piece of information that is lacking in galaxy catalogues, and it could allow us to probe the physics ...
  • Jafarzadeh, Shahin; Wedemeyer, Sven; Szydlarski, Mikolaj Marcin; De Pontieu, Bart Walter; Rezaei, Rezza; Carlsson, Mats (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2019)
    Solar observations with the Atacama Large Millimeter/submillimeter Array (ALMA) provide us with direct measurements of the brightness temperature in the solar chromosphere. We study the temperature distributions obtained ...
  • Müller, Daniel; St. Cyr, O. C.; Zouganelis, Ioannis; Gilbert, Holly R.; Marsden, R.; Nieves-Chinchilla, T.; Antonucci, E.; Auchère, Frédéric; Berghmans, D.; Horbury, T. S.; Howard, R. A.; Krucker, S.; Maksimovic, M.; Owen, Christopher J.; Rochus, P.; Rodriguez-Pacheco, J.; Romoli, M.; Solanki, Sami K.; Bruno, R.; Carlsson, Mats; Fludra, A.; Harra, Louise K.; Hassler, D.M.; Livi, S.; Louarn, Philippe; Peter, Hardi; Schüle, U.; Teriaca, L.; del Toro Iniesta, J. C.; Wimmer-Schweingruber, Robert F.; Marsch, E.; Velli, M.; De Groof, A.; Walsh, A.; Williams, D. (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2020)
    Aims. Solar Orbiter, the first mission of ESA’s Cosmic Vision 2015–2025 programme and a mission of international collaboration between ESA and NASA, will explore the Sun and heliosphere from close up and out of the ecliptic ...
  • Anderson, Mark; Appourchaux, T.; Auchère, Frédéric; Aznar Cuadrado, R.; Barbay, J.; Baudin, F.; Beardsley, S.; Bocchialini, Karine; Borgo, B.; Bruzzi, D.; Buchlin, E.; Burton, G.; Büchel, V.; Caldwell, M.; Caminade, S.; Carlsson, Mats; Curdt, W.; Davenne, J.; Davila, J.; DeForest, C. E.; Del Zanna, Giulio; Drummond, D.; Dubau, J.; Dumesnil, C.; Dunn, G.; Eccleston, P.; Fludra, A.; Fredvik, Terje; Gabriel, A.; Giunta, A.; Gottwald, A.; Griffin, D.; Grundy, T.; Guest, S.; Gyo, M.; Haberreiter, M.; Hansteen, Viggo; Harrison, R.; Hassler, D. M.; Haugan, Stein Vidar Hagfors; Howe, C.; Janvier, M.; Klein, R.; Koller, S.; Kucera, T. A.; Kouliche, D.; Marsch, E.; Marshall, A.; Marshall, G.; Matthews, Sharon A.; McQuirk, C.; Meining, S.; Mercier, C.; Morris, N.; Morse, T.; Munro, G.; Parenti, S.; Pastor-Santos, C.; Peter, H.; Pfiffner, D.; Phelan, P.; Philippon, A.; Richards, A.; Rogers, K.; Sawyer, C.; Schlatter, P.; Schmutz, W.; Schüle, U.; Shaughnessy, B.; Sidher, S.; Solanki, Sami K.; Speight, R.; Spescha, M.; Szwec, N.; Tamiatto, C.; Teriaca, L.; Thompson, W.; Tosh, I.; Tustain, S.; Vial, J.-C.; Walls, B.; Waltham, N.; Wimmer-Schweingruber, Robert F.; Woodward, S.; Young, P.; De Groof, A.; Pacros, A.; Williams, D.; Müller, Daniel (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2020)
    Aims. The Spectral Imaging of the Coronal Environment (SPICE) instrument is a high-resolution imaging spectrometer operating at extreme ultraviolet wavelengths. In this paper, we present the concept, design, and pre-launch ...
  • Braito, Valentina; Reeves, J. N.; Severgnini, Paola; Della Ceca, R.; Ballo, Lucia; Cicone, Claudia; Matzeu, Gabriele A.; Serafinelli, Roberto; Sirressi, Mattia (Journal article / Tidsskriftartikkel / AcceptedVersion; Peer reviewed, 2020)
    Past Suzaku, XMM–Newton, and NuSTAR observations of the nearby (z = 0.03233) bright Seyfert 2 galaxy MCG-03-58-007 revealed the presence of two deep and blue-shifted iron K-shell absorption line profiles. These could be ...
  • Eklund, Henrik; Wedemeyer, Sven; Szydlarski, Mikolaj Marcin; Jafarzadeh, Shahin; Guevara Gomez, Juan Camilo (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2020)
    Context. Solar observations with the Atacama Large Millimeter/sub-millimeter Array (ALMA) facilitate studies of the atmosphere of the Sun at chromospheric heights at high spatial and temporal resolution at millimeter ...
  • Barnes, Will T.; Bobra, Monica G; Christe, Steven D; Freij, N.; Hayes, Laura A.; Ireland, Jack; Mumford, Stuart; Pérez-Suárez, David; Ryan, Daniel F.; Shih, Albert Y.; Chanda, Prateek; Glogowski, Kolja; Hewett, Russell J; Hughitt, V. Keith; Hill, Andrew; Hiware, Kaustubh; Inglis, Andrew; Kirk, Michael S. F.; Konge, Sudarshan; Mason, James Paul; Maloney, Shane Anthony; Murray, Sophie A.; Panda, Asish; Park, Jongyeob; Mendes Domingos Pereira, Tiago; Reardon, K.; Savage, Sabrina L.; Sipocz, Brigitta M.; Stansby, David; Jain, Yash; Taylor, Garrison; Yadav, Tannmay; Rajul, .; Dang, Trung Kien (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2020)
    The goal of the SunPy project is to facilitate and promote the use and development of community-led, free, and open source data analysis software for solar physics based on the scientific Python environment. The project ...
  • Herman, Daniel Christopher (Master thesis / Masteroppgave, 2019)
  • Wedemeyer, Sven; Kučinskas, Arūnas; Klevas, Jonas; Ludwig, Hans-Günter (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2017)
    Aims. Although observational data unequivocally point to the presence of chromospheres in red giant stars, no attempts have been made so far to model them using 3D hydrodynamical model atmospheres. We therefore compute an ...
  • Bjørgen, Johan pires; Sukhorukov, Andrii V.; Leenaarts, Jorrit; Carlsson, Mats; de la Cruz Rodriguez, Jaime; Scharmer, Göran B.; Hansteen, Viggo (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2018)
    Context: CHROMIS, a new imaging spectrometer at the Swedish 1-m Solar Telescope (SST), can observe the chromosphere in the H and K lines of Ca II at high spatial and spectral resolution. Accurate modeling as well as an ...
  • Stepan, J.; Trujillo Bueno, J.; Leenaarts, Jorrit; Carlsson, Mats (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2015)
    Probing the magnetism of the upper solar chromosphere requires measuring and modeling the scattering polarization produced by anisotropic radiation pumping in UV spectral lines. Here we apply PORTA ( a novel radiative ...
  • Dahle, Håkon; Gladders, M. D.; Sharon, K.; Bayliss, M. B.; Rigby, J. R. (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2015)
    We report fi rst results from an ongoing monitoring campaign to measure time delays between the six images of the quasar SDSS J2222 + 2745, gravitationally lensed by a galaxy cluster. The time delay between A and B, the ...
  • Dyrland, Karianne (Master thesis / Masteroppgave, 2019)
  • Martinez-Sykora, Juan; De Pontieu, Bart Walter; Hansteen, Viggo; Gudiksen, Boris Vilhelm (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2016)
    The properties of nonstatistical equilibrium ionization of silicon and oxygen ions are analyzed in this work. We focus on five solar targets (quiet Sun; coronal hole; plage; quiescent active region, AR; and flaring AR) as ...
  • San, Metin (Master thesis / Masteroppgave, 2020)
  • Mouland, Maria (Master thesis / Masteroppgave, 2009)
    I have investigated the total energy of Friedmann-Robertson-Walker universes. This is an interesting issue, because if the energy of the universe turns out not to be conserved, it will be in conflict with our common ...
  • Eide, Marius Berge (Master thesis / Masteroppgave, 2015)
  • Biswas, T.; Gerwick, E.; Koivisto, Tomi Sebastian; Mazumdar, A. (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 ...
  • Christensen, Charlotte R.; Davé, Romeel; Brooks, Alyson M.; Quinn, Thomas; Shen, Sijing (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2018)
    We analyze the metal accumulation in dwarf and spiral galaxies by following the history of metal enrichment and outflows in a suite of 20 high-resolution simulated galaxies. These simulations agree with the observed stellar ...