Browsing Institutt for teoretisk astrofysikk by Title

Now showing items 24-43 of 1279

  • A possible sub-kiloparsec dual AGN buried behind the galaxy curtain 
    Severgnini, Paola; Braito, Valentina; Cicone, Claudia; Saracco, P.; Vignali, C.; Serafinelli, Roberto; Della Ceca, R.; Dotti, M.; Cusano, F.; Paris, D.; Pruto, G.; Zaino, A.; Ballo, Lucia; Landoni, M. (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2021)
    Although thousands of galaxy mergers are known, only a handful of sub-kiloparsec-scale supermassive black hole (SMBH) pairs have been confirmed so far, leaving a huge gap between the observed and predicted numbers of such ...
  • A sample of dust attenuation laws for Dark Energy Survey supernova host galaxies 
    Duarte, J.; González-Gaitán, S.; Mourão, A.; Paulino-Afonso, A.; Guilherme-Garcia, P.; Águas, J.; Galbany, L.; Kelsey, L.; Scolnic, D.; Sullivan, M.; Brout, D.; Palmese, A.; Wiseman, P.; Aguena, M.; Alves, O.; Bacon, D.; Bertin, E.; Bocquet, S.; Brooks, D.; Burke, D.L.; Carnero Rosell, A.; Carrasco Kind, M.; Carretero, J.; Costanzi, M.; Pereira, M.E.S.; Davis, T.M.; De Vicente, S.; Desai, S.; Diehl, H.T.; Doel, P.; Everett, S.; Ferrero, Ismael; Friedel, D.; Frieman, J.; García-Bellido, J.; Gatti, M.; Gerdes, D.W.; Gruen, D.; Gruendl, R.A.; Gutierrez, G.; Hinton, S.R.; Hollowood, D.L.; Honscheid, K.; James, D.J.; Kuehn, K.; Kuropatkin, N.; Melchior, P.; Miquel, R.; Paz-Chinchón, F.; Pieres, A.; Plazas Malagón, A.A.; Raveri, M.; Rodriguez-Monroy, M.; Sanchez, E.; Scarpine, V.; Sevilla-Noarbe, I.; Smith, M.; Suchyta, E.; Tarle, G.; To, C.; Weaverdyck, N. (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2023)
    Context. Type Ia supernovae (SNe Ia) are useful distance indicators in cosmology, provided their luminosity is standardized by applying empirical corrections based on light-curve properties. One factor behind these corrections ...
  • A Search of the Full Six Years of the Dark Energy Survey for Outer Solar System Objects 
    Bernardinelli, Pedro H.; Bernstein, Gary M.; Sako, Masao; Yanny, Brian; Aguena, M.; Allam, S.; Andrade-Oliveira, F.; Bertin, E.; Brooks, D.; Buckley-Geer, E.; Burke, D.L.; Carnero Rosell, A.; Carrasco Kind, M.; Carretero, J.; Conselice, C.; Costanzi, M.; da Costa, L.N.; De Vicente, J.; Desai, S.; Diehl, H.T.; Dietrich, J.P.; Doel, P.; Eckert, K.; Everett, S.; Ferrero, Ismael; Flaugher, B.; Fosalba, P.; Frieman, J.; Garciá-Bellido, J.; Gerdes, D.W.; Gruen, D.; Gruendl, R.A.; Gschwend, J.; Hinton, S.R.; Hollowood, D.L.; Honscheid, K.; James, D.J.; Kent, S.; Kuehn, K.; Kuropatkin, N.; Lahav, O.; Maia, M.A.G.; March, M.; Menanteau, F.; Miquel, R.; Morgan, R.; Myles, J.; Ogando, R.L.C.; Palmese, A.; Paz-Chinchón, F.; Pieres, A.; Plazas Malagón, A. A.; Romer, A.K.; Roodman, A.; Sanchez, E.; Scarpine, V.; Schubnell, M.; Serrano, S.; Sevilla-Noarbe, I.; Smith, M.; Soares-Santos, M.; Suchyta, E.; Swanson, M.E.C.; Tarle, G.; To, C.; Varga, T.N.; Walker, A.R. (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2022)
    We present a search for outer solar system objects in the 6 yr of data from the Dark Energy Survey (DES). The DES covered a contiguous 5000 deg2 of the southern sky with ≈80,000 3 deg2 exposures in the grizY filters between ...
  • A sensitive APEX and ALMA CO(1-0), CO(2-1), CO(3-2), and [CI](1-0) spectral survey of 40 local (ultra-)luminous infrared galaxies 
    Montoya Arroyave, Isabel; Cicone, Claudia; Makroleivaditi, E.; Weiss, A.; Lundgren, A.; Severgnini, P.; De Breuck, Carlos; Baumschlager, Bernhard; Schimek, Alice; Shen, Sijing; Aravena, M. (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2023)
    We present a high sensitivity, ground-based spectral line survey of low- J carbon monoxide (CO( J up  →  J up  − 1) with J up  = 1, 2, 3) and neutral carbon [CI] 3 P 1 − 3 P 0 ([CI](1–0)) in 36 local ultra-luminous infrared ...
  • A Simulation-based Method for Correcting Mode Coupling in CMB Angular Power Spectra 
    Leung, Jason S.-Y.; Hartley, J.; Nagy, J.M.; Netterfield, C.B.; Shariff, J.A.; Ade, P.A.R.; Amiri, M.; Benton, S.J.; Bergman, A.S.; Bihary, R.; Bock, J.J.; Bond, J.R.; Bonetti, J.A.; Bryan, S.A.; Chiang, H.C.; Contaldi, C.R.; Doré, O.; Duivenvoorden, A.J.; Eriksen, Hans Kristian Kamfjord; Farhang, M.; Filippini, J.P.; Fraisse, A.A.; Freese, K.; Galloway, Mathew; Gambrel, A.E.; Gandilo, N.N.; Ganga, K.; Gualtieri, R.; Gudmundsson, J.E.; Halpern, M.; Hasselfield, M.; Hilton, G.; Holmes, W.; Hristov, V.V.; Huang, Z.; Irwin, K.D.; Jones, W.C.; Karakci, Ata; Kuo, C.L.; Kermish, Z.D.; Li, S.; Mak, D.S.Y.; Mason, P.V.; Megerian, K.; Moncelsi, L.; Morford, T.A.; Nolta, M.; O'Brient, R.; Osherson, B.; Padilla, I.L.; Racine, Benjamin; Rahlin, A.S.; Reintsema, C.; Ruhl, J.E.; Runyan, M.C.; Ruud, Tone Melvær; Shaw, E.C.; Shiu, C.; Soler, J.D.; Song, X.; Trangsrud, A.; Tucker, C.; Tucker, R.S.; Turner, A.D.; van der List, J.F.; Weber, A.C.; Wehus, Ingunn Kathrine; Wen, S.; Wiebe, D.V.; Young, E.Y. (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2022)
    Modern cosmic microwave background (CMB) analysis pipelines regularly employ complex time-domain filters, beam models, masking, and other techniques during the production of sky maps and their corresponding angular power ...
  • A Statistical Study of IRIS Observational Signatures of Nanoflares and Nonthermal Particles 
    Cho, Kyuhyoun; Testa, Paola; De Pontieu, Bart Walter; Polito, Vanessa (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2023)
    Abstract Nanoflares are regarded as one of the major mechanisms of magnetic energy release and coronal heating in the solar outer atmosphere. We conduct a statistical study on the response of the chromosphere and ...
  • A statistical study of plasmoids associated with a post-CME current sheet 
    Patel, Ritesh; Pant, Vaibhav; Kalugodu, Chandrashekhar; Banerjee, Dipankar (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2020)
    Context. Coronal mass ejections (CMEs) are often observed to be accompanied by flare, current sheets, and plasmoids/plasma blobs. 2D and 3D numerical simulations and observations reported plasmoids moving upward as well ...
  • A Survey of Computational Tools in Solar Physics 
    Bobra, Monica G; Mumford, Stuart J; Hewett, Russell J; Christe, Steven D; Reardon, Kevin P.; Savage, Sabrina L.; Ireland, Jack; Mendes Domingos Pereira, Tiago; Chen, Bin; Pérez-Suárez, David (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2020)
    The SunPy Project developed a 13-question survey to understand the software and hardware usage of the solar-physics community. Of the solar-physics community, 364 members across 35 countries responded to our survey. We ...
  • A unified scenario for the origin of spiral and elliptical galaxy structural scaling laws 
    Ferrero, Ismael; Navarro, Julio F.; Abadi, Mario G.; Benavides, José A.; Mast, Damián (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2021)
    Elliptical (E) and spiral (S) galaxies follow tight, but different, scaling laws that link their stellar masses, radii, and characteristic velocities. Mass and velocity, for example, scale tightly in spirals with little ...
  • Accelerated particle beams in a 3D simulation of the quiet Sun 
    Frogner, Lars; Gudiksen, Boris Vilhelm; Bakke, Helle (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2020)
    Context. Observational and theoretical evidence suggest that beams of accelerated particles are produced in flaring events of all sizes in the solar atmosphere, from X-class flares to nanoflares. Current models of these ...
  • Accelerated particle beams in a 3D simulation of the quiet Sun: Effects of advanced beam propagation modelling 
    Frogner, Lars; Gudiksen, Boris Vilhelm (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2024)
    Context. Charged particles are constantly accelerated to non-thermal energies by the reconnecting magnetic field in the solar atmosphere. Our understanding of the interactions between the accelerated particles and their ...
  • Accelerated particle beams in a 3D simulation of the quiet Sun: Lower atmospheric spectral diagnostics 
    Bakke, Helle; Frogner, Lars; Rouppe van der Voort, Luc; Gudiksen, Boris Vilhelm; Carlsson, Mats (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2023)
    Context. Nanoflare heating through small-scale magnetic reconnection events is one of the prime candidates to explain heating of the solar corona. However, direct signatures of nanoflares are difficult to determine, and ...
  • Accelerating universe in modified teleparallel gravity theory 
    Sahlu, Shambel; Ntahompagaze, Joseph; Abebe, Amare; Mota, David (Journal article / Tidsskriftartikkel / AcceptedVersion; Peer reviewed, 2019)
    Abstract This paper studies the cosmology of accelerating expansion of the universe in modified teleparallel gravity theory. We discuss the cosmology of f ( T, B ) gravity theory and its implication to the new general form ...
  • Acceleration of High-Energy Electrons by Magnetic Reconnection in Coronal Nanoflares 
    Bakke, Helle Merethe (Master thesis / Masteroppgave, 2018)
  • Accurately predicting the escape fraction of ionizing photons using rest-frame ultraviolet absorption lines 
    Chisholm, John; Gazagnes, S; Schaerer, Daniel; Verhamme, Anne; Rigby, Jane R.; Bayliss, Matthew B.; Sharon, Keren; Gladders, Michael D.; Dahle, Håkon (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2018)
    The fraction of ionizing photons that escape high-redshift galaxies sensitively determines whether galaxies reionized the early Universe. However, this escape fraction cannot be measured from high-redshift galaxies because ...
  • Achievements of Hinode in the first eleven years 
    Al-Janabi, Khalid; Antolin, Patrick; Baker, Deborah; Bellot Rubio, Luis R.; Bradley, Louisa; Brooks, David H.; Centeno, Rebecca; Culhane, J. Leonard; Del Zanna, Giulio; Doschek, George A.; Fletcher, Lyndsay; Hara, Hirohiso; Harra, Louise K.; Hillier, Andrew S.; Imada, Shinsuke; Klimchuk, James A.; Mariska, John T.; Mendes Domingos Pereira, Tiago; Reeves, Katharine K.; Sakao, Taro; Sakurai, Takashi; Shimizu, Toshifumi; Shimojo, Masumi; Shiota, Daikou; Solanki, Sami K.; Sterling, Alphonse C.; Su, Yingna; Suematsu, Yoshinori; Tarbell, Theodore D.; Tiwari, Sanjiv K.; Toriumi, Shin; Ugarte-Urra, Ignacio; Warren, Harry P.; Watanabe, Tetsuya; Young, Peter R. (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2019)
    Hinode is Japan’s third solar mission following Hinotori (1981–1982) and Yohkoh (1991–2001): it was launched on 2006 September 22 and is in operation currently. Hinode carries three instruments: the Solar Optical Telescope, ...
  • Acoustic-gravity wave propagation characteristics in three-dimensional radiation hydrodynamic simulations of the solar atmosphere 
    Fleck, Bernhard; Carlsson, Mats; Khomenko, Elena; Rempel, M.; Steiner, Oskar; Vigeesh, G. (Journal article / Tidsskriftartikkel / AcceptedVersion; Peer reviewed, 2020)
    There has been tremendous progress in the degree of realism of three-dimensional radiation magneto-hydrodynamic simulations of the solar atmosphere in the past decades. Four of the most frequently used numerical codes are ...
  • AGN feedback through multiple jet cycles in the Seyfert galaxy NGC 2639 
    Rao, Vaishnav V.; Kharb, P.; Khatun, Rubinur; Silpa, S.; Roy, N.; Sebastian, B.; Singh, V.; Baghel, J.; Manna, S.; Ishwara-Chandra, C.H. (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2023)
  • Alfvén on heating by waves 
    de Moortel, Ineke; Falconer, Isobel; Stack, Robert (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2020)
    Abstract Ineke De Moortel, Isobel Falconer and Robert Stack explore the achievements and influence of Hannes Alfvén, in particular his seminal Monthly Notices paper of 1947 on the heating of the solar corona.
  • ALMA [C II] 158 μm detection of a redshift 7 lensed galaxy behind RX J1347.1-1145 
    Bradač, Maruša; Garcia-Appadoo, Diego; Huang, Kuang-Han; Vallini, Livia; Finney, Emily Quinn; Hoag, Austin; Lemaux, Brian C.; Schmidt, Kasper B.; Treu, Tommaso; Carilli, Chris; Dijkstra, Mark; Ferrara, Andrea; Fontana, Adriano; Jones, Tucker; Ryan, Russell; Wagg, Jeff; Gonzalez, Anthony H. (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2017)
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