Browsing Institutt for teoretisk astrofysikk by Title

Now showing items 664-683 of 1306

  • Line-Intensity Mapping with COMAP 
    Levén, Erik Alexander (Master thesis / Masteroppgave, 2019)
  • Linear Polarization Features in the Quiet-Sun Photosphere: Structure and Dynamics 
    Kianfar, S; Jafarzadeh, Shahin; Mirtorabi, MT; Riethmüller, T. L. (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2018)
    We present detailed characteristics of linear polarization features (LPFs) in the quiet-Sun photosphere from high-resolution observations obtained with SUNRISE/IMaX. We explore differently treated data with various noise ...
  • Linking the Sun to the Heliosphere Using Composition Data and Modelling: A Test Case with a Coronal Jet 
    Parenti, Susanna; Chifu, Iulia; Del Zanna, Giulio; Edmondson, Justin; Giunta, Alessandra; Hansteen, Viggo Haraldson; Higginson, Aleida; Laming, J. Martin; Lepri, Susan T.; Lynch, Benjamin J.; Rivera, Yeimy J.; von Steiger, Rudolf; Wiegelmann, Thomas; Wimmer-Schweingruber, Robert F.; Zambrana Prado, Natalia; Pelouze, Gabriel (Journal article / Tidsskriftartikkel / AcceptedVersion; Peer reviewed, 2021)
    Our understanding of the formation and evolution of the corona and the heliosphere is linked to our capability of properly interpret the data from remote sensing and in-situ observations. In this respect, being able to ...
  • Listening to the sound of dark sector interactions with gravitational wave standard sirens 
    Yang, Weiqiang; Vagnozzi, Sunny; Di Valentino, Eleonora; Nunes, Rafael C.; Pan, Supriya; Mota, David (Journal article / Tidsskriftartikkel / AcceptedVersion; Peer reviewed, 2019)
    We consider two stable Interacting Dark Matter-Dark Energy models and confront them against current Cosmic Microwave Background data from the Planck satellite. We then generate luminosity distance measurements from Script ...
  • LiteBIRD satellite: JAXA's new strategic L-class mission for all-sky surveys of cosmic microwave background polarization 
    Hazumi, Masashi; Ade, Peter A.R.; Adler, A.; Allys, E.; Arnold, K; Auguste, D.; Aumont, J.; Aurlien, Ragnhild; Austermann, J; Baccigalupi, Carlo; Banday, Anthony J.; Banerji, Ranajoy; Barreiro, R. B.; Basak, S.; Beall, J.; Beck, D.; Beckman, S; Bermejo, J.; de Bernardis, P.; Bersanelli, Marco; Bonis, J; Borrill, J.; Boulanger, F.; Bounissou, S.; Brilenkov, Maksym; Brown, M.; Bucher, Martin; Calabrese, E.; Campeti, P.; Carones, A.; Casas, F. J.; Challinor, A.; Chan, V.; Cheung, K.; Chinone, Y.; Cliche, J.-F.; Colombo, Loris; Columbro, F; Cubas, J.; Cukierman, A; Curtis, D; D'Alessandro, G; Dachlythra, N.; De Petris, M; Dickinson, C.; Diego-Palazuelos, P.; Dobbs, M; Dotani, T; Duband, L.; Duff, S.; Duval, J. M.; Ebisawa, K; Elleflot, T; Eriksen, Hans Kristian Kamfjord; Errard, J; Essinger-Hileman, T.; Finelli, Fabio; Flauger, R; Franceschet, C; Fuskeland, Unni; Galloway, Mathew; Ganga, K.; Gao, J. R.; Génova-Santos, R. T.; Gerbino, M.; Gervasi, M.; Ghigna, T; Gjerløw, Eirik; Gradziel, M. L.; Grain, J.; Grupp, F.; Gruppuso, A.; Gudmundsson, Jon E.; de Haan, T; Halverson, Nils W.; Hargrave, P; Hasebe, T; Hasegawa, M.; Hattori, M.; Henrot-Versillé, S.; Herman, Daniel Christopher; Herranz, D.; Hill, C. A.; Hilton, G.; Hirota, Y; Hivon, E.; Hlozek, R. A.; Hoshino, Y.; de la Hoz, E.; Hubmayr, J.; Ichiki, K; Iida, T; Imada, H; Ishimura, K.; Ishino, H; Jaehnig, G; Kaga, T.; Kashima, S; Katayama, N; Kato, A.; Kawasaki, T; Keskitalo, R.; Kisner, T; Kobayashi, Y; Kogiso, N; Kogut, A.; Kohri, K; Komatsu, E.; Komatsu, K; Konishi, K; Krachmalnicoff, N.; Kreykenbohm, I; Kuo, C. L.; Kushino, A; Lamagna, L; Lanen, J. V.; Lattanzi, M; Lee, A. T.; Leloup, C.; Levrier, F.; Linder, E; Louis, T.; Luzzi, G.; Maciaszek, T; Maffei, B; Maino, D.; Maki, M; Mandelli, S.; Martínez-González, E.; Masi, S; Matsumura, T; Mennella, A; Migliaccio, M.; Minami, Y; Mitsuda, K; Montgomery, J.; Montier, L; Morgante, G; Mot, B; Murata, Y.; Murphy, J. A.; Nagai, M.; Nagano, Y.; Nagasaki, T; Nagata, R; Nakamura, S; Namikawa, T; Natoli, P; Nerval, S.; Nishibori, T; Nishino, H.; Noviello, F; O'Sullivan, C.; Ogawa, H; Ogawa, H.; Oguri, S; Ohsaki, H; Ohta, I. S.; Okada, N; Okada, N.; Pagano, L.; Paiella, A; Paoletti, D.; Patanchon, G.; Peloton, J.; Piacentini, F; Pisano, G; Polenta, G.; Poletti, D; Prouvé, T.; Puglisi, G; Rambaud, D; Raum, C; Realini, S; Reinecke, M.; Remazeilles, M.; Ritacco, A.; Roudil, G.; Rubiño-Martín, J. A.; Russel, M; Sakurai, H.; Sakurai, Y; Sandri, M; Sasaki, M.; Savini, G; Scott, Douglas; Seibert, J.; Sekimoto, Y; Sherwin, B; Shinozaki, K; Shiraishi, M; Shirron, P.; Signorelli, G; Smecher, G.; Stever, S.; Stompor, R.; Sugai, H; Sugiyama, S.; Suzuki, A; Suzuki, J; Svalheim, Trygve Leithe; Switzer, E.; Takaku, R; Takakura, H.; Takakura, S; Takase, Y; Takeda, Y.; Tartari, A; Taylor, E.; Terao, Y; Thommesen, Harald; Thompson, K. L.; Thorne, B; Toda, T; Tomasi, M.; Tominaga, M; Trappe, N; Tristram, M.; Tsuji, M; Tsujimoto, M; Tucker, C.; Ullom, J.; Vermeulen, G; Vielva, P.; Villa, F.; Vissers, M.; Vittorio, N.; Wehus, Ingunn Kathrine; Weller, Jochen; Westbrook, B; Wilms, J; Winter, B; Wollack, E. J.; Yamasaki, N. Y.; Yoshida, T.; Yumoto, J; Zannoni, M; Zonca, A. (Journal article / Tidsskriftartikkel / AcceptedVersion; Peer reviewed, 2020)
    LiteBIRD, the Lite (Light) satellite for the study of B-mode polarization and Inflation from cosmic background Radiation Detection, is a space mission for primordial cosmology and fundamental physics. JAXA selected LiteBIRD ...
  • LiteBIRD: A Satellite for the Studies of B-Mode Polarization and Inflation from Cosmic Background Radiation Detection 
    Hazumi, M.; Ade, Peter A.R.; Akiba, Y; Alonso, D; Arnold, K; Aumont, J.; Baccigalupi, Carlo; Barron, D; Basak, S.; Beckman, S; Borrill, J.; Boulanger, F.; Bucher, Martin; Calabrese, E.; Chinone, Y.; Cho, S; Cukierman, A; Curtis, D. W.; de Haan, T; Dobbs, M; Dominjon, A; Dotani, T; Duband, L.; Ducout, A.; Dunkley, J.; Duval, J. M.; Elleflot, T; Eriksen, Hans Kristian Kamfjord; Errard, J; Fischer, J.; Fujino, T; Funaki, T; Fuskeland, Unni; Ganga, K.; Goeckner-Wald, N; Grain, J.; Halverson, Nils W.; Hamada, T; Hasebe, T; Hasegawa, M.; Hattori, K; Hattori, M.; Hayes, L.; Hidehira, N; Hill, C. A.; Hilton, G.; Hubmayr, J.; Ichiki, K; Iida, T; Imada, H; Inoue, M; Inoue, Y.; Irwin, K. D.; Ishino, H; Jeong, O; Kanai, H; Kaneko, D; Kashima, S; Katayama, N; Kawasaki, T; Kernasovskiy, S. A.; Keskitalo, R.; Kibayashi, A; Kida, Y; Kimura, K; Kisner, T; Kohri, K; Komatsu, E.; Komatsu, K; Kuo, C. L.; Kurinsky, N. A.; Kusaka, A.; Lazarian, A; Lee, A. T.; Li, D; Linder, E; Maffei, B; Mangilli, A; Maki, M; Matsumura, T; Matsuura, S; Meilhan, D; Mima, S; Minami, Y; Mitsuda, K; Montier, L; Nagai, M.; Nagasaki, T; Nagata, R; Nakajima, M; Nakamura, S; Namikawa, T; Naruse, M; Nishino, H.; Nitta, T; Noguchi, T; Ogawa, H; Oguri, S; Okada, N; Okamoto, A; Okamura, T; Otani, C; Patanchon, G.; Pisano, G; Rebeiz, G; Remazeilles, M.; Richards, P. L.; Sakai, S.; Sakurai, Y; Sato, Y; Sato, N.; Sawada, M; Segawa, Y; Sekimoto, Y; Seljak, U.; Sherwin, B. D.; Shimizu, T.; Shinozaki, K; Stompor, R.; Sugai, H; Sugita, H.; Suzuki, A; Suzuki, J; Tajima, O.; Takada, S; Takaku, R; Takakura, S; Takatori, S; Tanabe, D; Taylor, E.; Thompson, K. L.; Thorne, B; Tomaru, T; Tomida, T; Tomita, N.; Tristram, M.; Tucker, C.; Turin, P; Tsujimoto, M; Uozumi, S; Utsunomiya, S; Uzawa, Y; Vansyngel, F.; Wehus, Ingunn Kathrine; Westbrook, B; Willer, M; Whitehorn, N; Yamada, Y.; Yamamoto, R; Yamasaki, N; Yamashita, T.; Yoshida, M. (Journal article / Tidsskriftartikkel / AcceptedVersion; Peer reviewed, 2019)
  • Local observables in a landscape of infrared gauge modes 
    Thorsrud, Mikjel; Mota, David; Urban, Federico (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2014)
    Cosmological local observables are at best statistically determined by the fundamental theory describing inflation. When the scalar inflaton is coupled uniformly to a collection of subdominant massless gauge vectors, ...
  • Long-timescale stability in CMB observations at multiple frequencies using front-end polarization modulation 
    Cleary, Joseph; Datta, Rahul; Appel, John W.; Bennett, Charles L.; Chuss, David T.; Couto, Jullianna Denes; Dahal, Sumit; Espinoza, Francisco; Essinger-Hileman, Thomas; Harrington, Kathleen; Iuliano, Jeffrey; Li, Yunyang; Marriage, Tobias A.; Núñez, Carolina; Petroff, Matthew A.; Reeves, Rodrigo; Shi, Rui; Watts, Duncan; Wollack, Edward J.; Xu, Zhilei (Journal article / Tidsskriftartikkel / AcceptedVersion; Peer reviewed, 2022)
    The Cosmology Large Angular Scale Surveyor (CLASS) is a telescope array observing the Cosmic Microwave Background (CMB) at frequency bands centered near 40, 90, 150, and 220 GHz. CLASS measures the CMB polarization on the ...
  • Low-level Data Analysis, Calibration, and Ground Modeling with COMAP 
    Lunde, Jonas Gahr Sturtzel (Master thesis / Masteroppgave, 2021)
    The CO Mapping Array Project (COMAP) is a line intensity mapping experiment currently in its Pathfinder phase, where it is targeting CO emissions at redshifts z=2.4-3.4. A main goal of the Pathfinder phase is to build a ...
  • Lyman α-emitting galaxies in the epoch of reionization 
    Laursen, Peter; Sommer-Larsen, Jesper; Milvang-Jensen, Bo; Fynbo, Johan P. U.; Razoumov, Alexei O. (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2019)
    With a total integration time of 168 h and a narrowband filter tuned to Lyα emission from z = 8.8, the UltraVISTA survey has set out to find some of the most distant galaxies, on the verge of the epoch of reionization. ...
  • Lyman-Werner escape fractions from the first galaxies 
    Schauer, Anna T. P.; Agarwal, B.; Glover, Simon C. O.; Klessen, Ralf S.; Latif, Muhammad A.; Mas Ribas, Lluis; Rydberg, Claes-Erik; Whalen, Daniel J.; Zackrisson, Erik (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2017)
    Direct collapse black holes forming in pristine, atomically cooling haloes at z ≈ 10–20 may act as the seeds of supermassive black holes (BHs) at high redshifts. In order to create a massive BH seed, the host halo needs ...
  • Lyα Profile, Dust, and Prediction of Lyα Escape Fraction in Green Pea Galaxies 
    Yang, Huan; Malhotra, Sangeeta; Gronke, Max Balthasar; Rhoads, James E.; Leitherer, Claus; Wofford, Aida; Jiang, Tianxing; Dijkstra, Mark; Tilvi, V.; Wang, Junxian (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2017)
    © 2017. The American Astronomical Society. All rights reserved.
  • The Lyα Reference Sample. VIII. Characterizing Lyα Scattering in Nearby Galaxies 
    Bridge, Joanna S.; Hayes, Matthew; Melinder, Jens; Östlin, Göran; Gronwall, Caryl; Ciardullo, Robin; Atek, Hakim; Cannon, John M.; Gronke, Max Balthasar; Guaita, Lucia; Hagen, Alex; Herenz, Edmund Christian; Kunth, Daniel; Laursen, Peter; Mas-Hesse, J. Miguel; Pardy, Stephen A. (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2017)
    © 2017. The American Astronomical Society. All rights reserved.
  • The Lyα-LyC connection: evidence for an enhanced contribution of UV-faint galaxies to cosmic reionization 
    Dijkstra, Mark; Gronke, Max Balthasar; Venkatesan, Aparna (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2016)
    The escape of ionizing Lyman continuum (LyC) photons requires the existence of low-NH I sightlines, which also promote escape of Lyα. We use a suite of 2500 Lyα Monte-Carlo radiative transfer simulations through models of ...
  • Machine Learning for Searching the Dark Energy Survey for Trans-Neptunian Objects 
    Henghes, Ben; Lahav, Ofer; Gerdes, David W.; Lin, H. W.; Morgan, R.; Abbott, T. M. C.; Aguena, M.; Allam, S.; Annis, J.; Avila, S.; Bertin, E.; Brooks, D.; 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.; Doel, P.; Everett, S.; Ferrero, Ismael; Frieman, J.; García-Bellido, Juan; Gaztanaga, E.; Gruen, D.; Gruendl, Robert A.; Gschwend, J.; Gutierrez, G.; Hartley, W. G.; Hinton, S. R.; Honscheid, K.; Hoyle, B.; James, D. J.; Kuehn, K.; Kuropatkin, N.; Marshall, Jennifer L.; Melchior, P.; Menanteau, F.; Miquel, R.; Ogando, R. L. C.; Palmese, Antonella; Paz-Chinchón, Francisco; Plazas, Andrés A.; Romer, A. K.; Sánchez, C.; Sanchez, E.; Scarpine, V.; Schubnell, M.; Serrano, S.; Smith, M.; Soares-Santos, M; Suchyta, E.; Tarle, G.; To, C.; Wilkinson, R. D. (Journal article / Tidsskriftartikkel / AcceptedVersion; Peer reviewed, 2020)
    In this paper we investigate how implementing machine learning could improve the efficiency of the search for Trans-Neptunian Objects (TNOs) within Dark Energy Survey (DES) data when used alongside orbit fitting. The ...
  • Machine learning initialization to accelerate Stokes profile inversions 
    Gafeira, Ricardo; Orozco Suarez, D.; Milić, Ivan; Quintero Noda, Carlos; Ruiz Cobo, Basilio; Uitenbroek, Han (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2021)
    Context. At present, an exponential growth in scientific data from current and upcoming solar observatories is expected. Most of the data consist of high spatial and temporal resolution cubes of Stokes profiles taken in ...
  • The Magellan Evolution of Galaxies Spectroscopic and Ultraviolet Reference Atlas (MegaSaura). I. the Sample and the Spectra 
    Rigby, J. R.; Bayliss, M. B.; Sharon, K.; Gladders, M. D.; Chisholm, J.; Dahle, Håkon; Johnson, Traci; Paterno-Mahler, Rachel; Wuyts, E; Kelson, D. D. (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2018)
    We introduce Project MegaSaura: the Magellan Evolution of Galaxies Spectroscopic and Ultraviolet Reference Atlas. MegaSaura comprises medium-resolution, rest-frame ultraviolet spectroscopy of N = 15 bright gravitationally ...
  • The Magellan Evolution of Galaxies Spectroscopic and Ultraviolet Reference Atlas (MegaSaura). II. Stacked Spectra 
    Rigby, J. R.; Bayliss, M. B.; Chisholm, J.; Bordoloi, Rongmon; Sharon, K.; Gladders, M. D.; Johnson, T.; Paterno-Mahler, Rachel; Wuyts, E; Dahle, Håkon; Acharyya, A. (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2018)
    We stack the rest-frame ultraviolet spectra of N = 14 highly magnified gravitationally lensed galaxies at redshifts $1.6\lt z\lt 3.6$. The resulting new composite spans $900\lt {\lambda }_{\mathrm{rest}}\lt 3000$ Å, with ...
  • Magnetic characteristics of quiet Sun nanoflares: How to find order out of a tangled mess 
    Robinson, Rebecca A. (Doctoral thesis / Doktoravhandling, 2023)
    Nanoflares are tiny, energetic explosions on the Sun—and we accidentally simulated one. This work focuses on the development and characteristics of a nanoflare-scale magnetic reconnection event that was simulated using our ...
  • Magnetic field variations associated with umbral flashes and penumbral waves 
    Joshi, Jayant; de la Cruz Rodriguez, Jaime (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2018)
    Context: Umbral flashes (UF) and running penumbral waves (RPWs) in sunspot chromospheres leave a dramatic imprint in the intensity profile of the Ca II 8542 Å line. Recent studies have focussed on also explaining the ...