Now showing items 95-114 of 495

  • Verde, Licia; Bellini, Emilio; Pigozzo, Cassio; Heavens, Alan F.; Jimenez, Raul (Journal article / Tidsskriftartikkel / AcceptedVersion; Peer reviewed, 2017)
    We investigate our knowledge of early universe cosmology by exploring how much additional energy density can be placed in different components beyond those in the ΛCDM model. To do this we use a method to separate early- ...
  • Hodzic, Vedad (Master thesis / Masteroppgave, 2017)
    The Next Generation Transit Survey (NGTS) is an ongoing wide-field exoplanet transit survey at ESO Paranal Observatory, Chile. It is searching for Neptune and super-Earth size planets around nearby stars using 12 robotic ...
  • Falck, Bridget Lynn; McCullagh, N.; Neyrinck, M. C.; Wang, J.; Szalay, A. S. (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2017)
    © 2017. The American Astronomical Society. All rights reserved.
  • Tangvald, Anders (Master thesis / Masteroppgave, 2008)
    Observations of the Cosmic Microwave Background is impaired by other astrophysical sources that also radiate in the microwave spectrum. These other, non-CMB sources are known as foregrounds. In this thesis, three different ...
  • Leenaarts, Jorrit; de la Cruz Rodriguez, Jaime; Kochukhov, Oleg; Carlsson, Mats (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2014)
    The Ca II 854.2 nm spectral line is a common diagnostic of the solar chromosphere. The average line profile shows an asymmetric core, and its bisector shows a characteristic inverse-C shape. The line actually consists of ...
  • Yang, Weiqiang; Pan, Supriya; Xu, Lixin; Mota, David (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2018)
    We study a novel interacting dark energy − dark matter scenario where the anisotropic stress of the large-scale inhomogeneities is considered. The dark energy has a constant equation of state and the interaction model ...
  • Yang, Weiqiang; Nunes, Rafael C.; Pan, Supriya; Mota, David (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2017)
    © 2017 American Physical Society
  • Pereira, Tiago Mendes Domingos; De Pontieu, Bart; Carlsson, Mats (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2013)
    Spicules have been observed on the Sun for more than a century, typically in chromospheric lines such as Hα and Ca II H. Recent work has shown that so-called "type II" spicules may have a role in providing mass to the ...
  • Vissers, Gregal Joan Maria; Rouppe, Van Der Voort Luc; Rutten, Robert; Carlsson, Mats; De Pontieu, Bart Walter (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2015)
    Ellerman bombs (EBs) are transient brightenings of the extended wings of the solar Balmer lines in emerging active regions. We describe their properties in the ultraviolet lines sampled by the Interface Region Imaging ...
  • Rutten, Robert; Rouppe, Van Der Voort Luc; Vissers, Gregal Joan Maria (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. ...
  • Ortiz, Ada; Bellot Rubio, L. R.; Hansteen, Viggo; de la Cruz Rodriguez, Jaime; Rouppe, Van Der Voort Luc (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 ...
  • de la Cruz Rodriguez, Jaime; Hansteen, Viggo; Bellot-Rubio, Luis; Ortiz, Ada (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2015)
    Magnetic flux emergence into the outer layers of the Sun is a fundamental mechanism for releasing energy into the chromosphere and the corona. In this paper, we study the emergence of granular-sized flux concentrations and ...
  • Ortiz, Ada; Hansteen, Viggo; Bellot Rubio, L. R.; de la Cruz Rodriguez, Jaime; De Pontieu, Bart Walter; Carlsson, Mats; Rouppe, Van Der Voort Luc (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2016)
    We study, for the first time, the ascent of granular-sized magnetic bubbles from the solar photosphere through the chromosphere into the transition region and above. Such events occurred in a flux emerging region in NOAA ...
  • Johnson, Jarrett L.; Dijkstra, Mark (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2017)
    We assess the impact of trapped Lyman α cooling radiation on the formation of direct collapse black holes (DCBHs). We apply a one-zone chemical and thermal evolution model, accounting for the photodetachment of H− ions, ...
  • Hammerstrøm, Maria (Master thesis / Masteroppgave, 2017)
    In order to estimate the mass of supermassive black holes found in the centres of active galactic nuclei (AGNs) from spectroscopic data, the contamination from the light emitted by the stars in the surrounding host galaxy ...
  • Maciaszek, T; Ealet, Anne; Jahnke, K.; Prieto, E.; Barbier, R.; Mellier, Y.; Beaumont, Florent; Bon, William; Bonnefoi, Anne; Carle, Michael; Caillat, Amandine; Costille, A.; Dormoy, Doriane; Ducret, F.; Fabron, C.; Febvre, A.; Foulon, B.; Garcia, J.; Gimenez, J.-L.; Grassi, Emmanuel; Laurent, P; Le Mignant, D.; Martin, L.; Rossin, C.; Pamplona, T.; Sanchez, P.; Vives, Sebastien; Clemens, J. C.; Gillard, W.; Niclas, M.; Secroun, A.; Serra, B.; Kubik, B.; Ferriol, Sylvain; Amiaux, J.; Barriere, J. C.; Berthe, M; Rosset, C; Macías-Pérez, J. F.; Auricchio, Natalia; de Rosa, A.; Franceschi, E.; Guizzo, Gian Paolo; Morgante, G; Sortino, F.; Trifoglio, Massimo; Valenziano, L.; Patrizii, Laura; Chiarusi, T.; Fornari, F.; Giacomini, F.; Margiotta, A.; Mauri, N.; Pasqualini, L.; Sirri, G.; Spurio, M.; Tenti, M.; Travaglini, R.; Dusini, S.; Dal Corso, F; Laudisio, F.; Sirignano, C.; Stanco, L.; Ventura, S; Borsato, E; Bonoli, C.; Bortoletto, F.; Balestra, Andrea; D'Alessandro, M.; Medinaceli, E.; Farinelli, Ruben; Corcione, L.; Ligori, S.; Grupp, F.; Wimmer, Carolin; Hormuth, F.; Seidel, G.; Wachter, S.; Padilla, C.; Lamensans, Mikel; Casas, Ricard; Lloro, Ivan; Toledo-Moreo, Rafael; Gomez, Jaime; Colodro-Conde, Carlos; Lizan, David; Diaz, Jose J.; Lilje, Per Barth; Toulouse-Aastrup, C.; Andersen, M. I.; Sørensen, Anton N.; Jakobsen, Peter; Hornstrup, Allan; Jessen, Niels-Christian; Thizy, Cedric; Holmes, W; Israelsson, U; Seiffert, M.; Waczynski, A.; Laureijs, R. J.; Racca, G.; Salvignol, J.-C.; Boenke, Tobias; Strada, P. (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 ...
  • Maciaszek, T; Ealet, A; Jahnke, K.; Prieto, E.; Barbier, R.; Mellier, Y.; Costille, A.; Ducret, F.; Fabron, C.; Gimenez, J.-L.; Grange, R.; Martin, L.; Rossin, C.; Pamplona, T.; Vola, P.; Clemens, J. C.; Smadja, G.; Amiaux, J.; Barriere, J. C.; Berthe, M; De Rosa, A; Franceschi, E.; Morgante, G; Trifoglio, M.; Valenziano, L; Bonoli, C.; Bortoletto, F.; D'Alessandro, M.; Corcione, L.; Ligori, S.; Garilli, B.; Riva, M.; Grupp, F.; Vogel, C.; Hormuth, F.; Seidel, G.; Wachter, S.; Diaz, J. J.; Grañena, F.; Padilla, C.; Toledo, R.; Lilje, Per Barth; Solheim, Bjarte Gees Bokn; Toulouse-Aastrup, C.; Andersen, M.; Holmes, W; Israelsson, U; Seiffert, M.; Weber, C; Waczynski, A.; Laureijs, R. J.; Racca, G.; Salvignol, J.C.; Strada, P. (Journal article / Tidsskriftartikkel / AcceptedVersion; Peer reviewed, 2014)
    The Euclid mission objective is to understand why the expansion of the Universe is accelerating by mapping the geometry of the dark Universe by investigating the distance-redshift relationship and tracing the evolution of ...
  • Vissers, Gregal Joan Maria; Rouppe, Van Der Voort Luc; Carlsson, Mats (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2015)
    Penumbral microjets (PMJs) are short-lived, fine-structured, and bright jets that are generally observed in chromospheric imaging of the penumbra of sunspots. Here we investigate their potential transition region signature ...
  • Tiwari, Sanjiv K.; Moore, Ronald L.; De Pontieu, Bart Walter; Tarbell, Theodore D.; Panesar, Navdeep K.; Winebarger, Amy R.; Sterling, Alphonse C. (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2018)
    A recent study using Hinode (Solar Optical Telescope/Filtergraph [SOT/FG]) data of a sunspot revealed some unusually large penumbral jets that often repeatedly occurred at the same locations in the penumbra, namely, at the ...
  • Mota, David; Schelpe, C. A. O. (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2012)
    In order to satisfy limits on the allowed variation of particle masses from big bang nucleosynthesis until today, the chameleon scalar field is required to reach its attractor solution early on in its cosmological evolution. ...