Browsing Institutt for teoretisk astrofysikk by Title

Now showing items 197-216 of 1279

  • Constraints on the spectral index of polarized synchrotron emission from WMAP and Faraday-corrected S-PASS data 
    Fuskeland, Unni; Andersen, Kristian Joten; Aurlien, Ragnhild; Banerji, Ranajoy; Brilenkov, Maksym; Eriksen, Hans Kristian Kamfjord; Galloway, Mathew; Gjerløw, Eirik; Næss, S.K.; Svalheim, Trygve Leithe; Wehus, Ingunn Kathrine (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2021)
    We constrain the spectral index of polarized synchrotron emission, β s , by correlating the recently released 2.3 GHz S -Band Polarization All Sky Survey ( S -PASS) data with the 23 GHz 9-year Wilkinson Microwave Anisotropy ...
  • Constraints to Dark Energy Using PADE Parameterizations 
    Rezaei, M.; Malekjani, M.; Basilakos, S.; Mehrabi, A.; Mota, David (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2017)
    © 2017. The American Astronomical Society. All rights reserved.
  • Construction of a large diameter reflective half-wave plate modulator for millimeter wave applications 
    Eimer, Joseph R.; Brewer, Michael K.; Chuss, David T.; Karakla, John; Shi, Rui; Appel, John W.; Bennett, Charles L.; Cleary, Joseph; Dahal, Sumit; Datta, Rahul; Essinger-Hileman, Thomas; Marriage, Tobias A.; Núñez, Carolina; Petroff, Matthew A.; Watts, Duncan; Wollack, Edward J.; Xu, Zhilei (Journal article / Tidsskriftartikkel / AcceptedVersion; Peer reviewed, 2022)
    Polarization modulation is a powerful technique to increase the stability of measurements by enabling the distinction of a polarized signal from dominant slow system drifts and unpolarized foregrounds. Furthermore, when ...
  • Control and systems software for the Cosmology Large Angular Scale Surveyor (CLASS) 
    Petroff, Matthew A.; Appel, John W.; Bennett, Charles L.; Brewer, Michael K.; Chan, Manwei; Chuss, David T.; Cleary, Joseph; Couto, Jullianna Denes; Dahal, Sumit; Eimer, Joseph R.; Essinger-Hileman, Thomas; Fluxá Rojas, Pedro; Harrington, Kathleen; Iuliano, Jeffrey; Marriage, Tobias A.; Miller, Nathan J.; Nunes Valle, Deniz Augusto; Watts, Duncan; Xu, Zhilei (Journal article / Tidsskriftartikkel / AcceptedVersion; Peer reviewed, 2020)
    The Cosmology Large Angular Scale Surveyor (CLASS) is an array of polarization-sensitive millimeter wave telescopes that observes ∼ 70% of the sky at frequency bands centered near 40 GHz, 90 GHz, 150 GHz, and 220 GHz from ...
  • COOL-LAMPS. Discovery of COOL J0335-1927, a Gravitationally Lensed Quasar at z=3.27 with an Image Separation of 23".3 
    Napier, Kate; Gladders, Michael D.; Sharon, Keren; Dahle, Håkon; Cloonan, Aidan P.; Mahler, Guillaume; Escapa, Isaiah; Garza, Josh; Kisare, Andrew; Malagon, Natalie; Mork, Simon; Niu, Kunwanhui; Rosener, Riley; Sullivan jr., Jamar; Tagliavia, Marie; Tamargo-Arizmendi, Marcos; Teixeira, Raul; Tsiane, Kabelo; Wagner, Grace; Zhang, Yunchong; Zhao, Megan (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2023)
  • COOL-LAMPS. II. Characterizing the Size and Star Formation History of a Bright Strongly Lensed Early-type Galaxy at Redshift 1.02 
    Sukay, Ezra; Khullar, Gourav; Gladders, Michael D.; Sharon, Keren; Mahler, Guillaume; Napier, Kate; Bleem, Lindsey E.; Dahle, Håkon; Florian, Michael K.; Gozman, Katya; Lin, Jason J.; Martinez, Michael N.; Matthews Acuña, Owen S.; Medina, Elisabeth; Merz, Kaiya; Sanchez, Jorge A.; Sisco, Emily E.; Stein, Daniel J. Kavin; Tavangar, Kiyan; Whitaker, Katherine E. (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2022)
    We present COOL J1323+0343, an early-type galaxy at z = 1.0153 ± 0.0006, strongly lensed by a cluster of galaxies at z = 0.353 ± 0.001. This object was originally imaged by DECaLS and noted as a gravitational lens by ...
  • COOL-LAMPS. III. Discovery of a 25″.9 Separation Quasar Lensed by a Merging Galaxy Cluster 
    Martinez, Michael N.; Napier, Kate A.; Cloonan, Aidan P.; Sukay, Ezra; Gozman, Katya; Merz, Kaiya; Khullar, Gourav; Lin, Jason J.; Matthews Acuña, Owen S.; Medina, Elisabeth; Sanchez, Jorge A.; Sisco, Emily E.; Kavin Stein, Daniel J.; Tavangar, Kiyan; González, Juan Remolina; Mahler, Guillaume; Sharon, Keren; Dahle, Håkon; Gladders, Michael D. (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2023)
  • COOL-LAMPS. IV. A Sample of Bright Strongly Lensed Galaxies at 3 < z < 4 
    Zhang, Yunchong; Manwadkar, Viraj; Gladders, Michael D.; Khullar, Gourav; Dahle, Håkon; Napier, Kate A.; Mahler, Guillaume; Sharon, Keren; Matthews Acuña, Owen S.; Ashmead, Finian; Cerny, William; Gonzàlez, Juan Remolina; Gozman, Katya; Levine, Benjamin C.; Marohnic, Daniel; Martinez, Michael N.; Merz, Kaiya; Pan, Yue; Sanchez, Jorge A.; Sierra, Isaac; Sisco, Emily E.; Sukay, Ezra; Tavangar, Kiyan; Zaborowski, Erik (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2023)
  • COOL-LAMPS. VI. Lens Model and New Constraints on the Properties of COOL J1241+2219, a Bright z = 5 Lyman Break Galaxy and its z = 1 Cluster Lens 
    Klein, Maxwell; Sharon, Keren; Napier, Kate; Gladders, Michael D.; Khullar, Gourav; Bayliss, Matthew; Dahle, Håkon; Owens, M. Riley; Stark, Antony; Brownsberger, Sasha; Kim, Keunho J.; Kuchta, Nicole; Mahler, Guillaume; Smith, Grace; Walker, Ryan; Gozman, Katya; Martinez, Michael N.; Matthews Acuña, Owen S.; Merz, Kaiya; Sanchez, Jorge A.; Stein, Daniel J. Kavin; Sukay, Ezra O.; Tavangar, Kiyan (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2024)
  • Coordination within the remote sensing payload on the Solar Orbiter mission 
    Auchère, Frédéric; Andretta, V.; Antonucci, E.; Bach, N.; Battaglia, M.; Bemporad, Alberto; Berghmans, D.; Buchlin, Éric; Caminade, S.; Carlsson, Mats; Carlyle, J.; Cerullo, J. J.; Chamberlin, P. C.; Colaninno, R. C.; Davila, J. M.; De Groof, A.; Etesi, L.; Fahmy, S.; Fineschi, S.; Fludra, A.; Gilbert, Holly R.; Giunta, A.; Grundy, T.; Haberreiter, M.; Harra, Louise K.; Hassler, D. M.; Hirzberger, J.; Howard, R. A.; Hurford, G.; Kleint, L.; Kolleck, M.; Krucker, S.; Lagg, A.; Landini, F.; Long, D. M.; Lefort, J.; Lodiot, S.; Mampaey, B.; Maloney, S.; Marliani, F.; Martinez-Pillet, V.; McMullin, D. R.; Müller, Daniel; Nicolini, G.; Orozco Suarez, D.; Pacros, A.; Pancrazzi, M.; Parenti, S.; Peter, Hardi; Philippon, A.; Plunkett, S.; Rich, N.; Rochus, P.; Rouillard, A.; Romoli, M.; Sanchez, L.; Schüle, U.; Sidher, S.; Solanki, Sami K.; Spadaro, D.; St. Cyr, O. C.; Straus, T.; Tanco, I.; Teriaca, L.; Thompson, W. T.; del Toro Iniesta, J. C.; Verbeeck, C.; Vourlidas, A.; Watson, C.; Wiegelmann, T.; Williams, D.; Woch, J.; Zhukov, A. N.; Zouganelis, Iannis (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2020)
    Context. To meet the scientific objectives of the mission, the Solar Orbiter spacecraft carries a suite of in-situ (IS) and remote sensing (RS) instruments designed for joint operations with inter-instrument communication ...
  • Core-collapse supernovae in the Dark Energy Survey: luminosity functions and host galaxy demographics 
    Grayling, M.; Gutiérrez, C.P.; Sullivan, M.; Wiseman, P.; Vincenzi, M.; Galbany, L.; Möller, A.; Brout, D.; Davis, T.M.; Frohmaier, C.; Graur, O.; Kelsey, L.; Lidman, C.; Popovic, B.; Smith, M.; Toy, M.; Tucker, B.E.; Zontos, Z.; Abbott, T.M.C.; Aguena, M.; Allam, S.; Andrade-Oliveira, F.; Annis, J.; Asorey, J.; Bacon, D.; Bertin, E.; Bocquet, S.; Brooks, D.; Carnero Rosell, A.; Carollo, D.; Carrasco Kind, M.; Carretero, J.; Costanzi, M.; da Costa, L.N.; Pereira, M.E.S.; De Vicente, J.; Desai, S.; Diehl, H.T.; Doel, P.; Everett, S.; Ferrero, Ismael; Friedel, D.; Frieman, J.; García-Bellido, J.; Gatti, M.; Gruen, D.; Gschwend, J.; Gutierrez, G.; Hinton, S.R.; Hollowood, D.L.; Honscheid, K.; James, D.J.; Kuehn, K.; Kuropatkin, N.; Lewis, G.F.; Malik, U.; March, M.; Menanteau, F.; Miquel, R.; Morgan, R.; Ogando, R.L.C.; Palmese, A.; Paz-Chinchón, F.; Pieres, A.; Plazas Malagón, A.A.; Rodriguez-Monroy, M.; Romer, A.K.; Roodman, A.; Sanchez, E.; Scarpine, V.; Sevilla-Noarbe, I.; Suchyta, E.; Tarle, G.; To, C.; Tucker, D.L.; Varga, T.N. (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2023)
    ABSTRACT We present the luminosity functions and host galaxy properties of the Dark Energy Survey (DES) core-collapse supernova (CCSN) sample, consisting of 69 Type II and 50 Type Ibc spectroscopically and ...
  • Coronal Abundances in an Active Region: Evolution and Underlying Chromospheric and Transition Region Properties 
    Testa, Paola; Martinez-Sykora, Juan; De Pontieu, Bart Walter (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2023)
    Abstract The element abundances in the solar corona and solar wind are often different from those of the solar photosphere, typically with a relative enrichment of elements with low first ionization potential ...
  • Coronal and transition region intensities as seen in 3d numerical models and from Hinode/EIS 
    Olluri, Kosovare (Master thesis / Masteroppgave, 2008)
  • Coronal Heating by Magnetic Reconnection - Calculations of Quasi-Separatrix Layers 
    Grav, Bjarne (Master thesis / Masteroppgave, 2016)
    Several decades ago it was discovered that the outer layers of the Sun are much hotter than the photosphere. The mechanism or mechanisms heating the outer solar layers are not known, so this is known as the coronal heating ...
  • Coronal Heating by MHD Waves 
    Van Doorsselaere, Tom; Srivastava, Abhishek; Antolin, Patrick; Magyar, Norbert; Vasheghani Farahani, Soheil; Tian, Hui; Kolotkov, Dmitrii; Ofman, Leon; Guo, Mingzhe; Arregui, Iñigo; de Moortel, Ineke; Pascoe, David D. (Journal article / Tidsskriftartikkel / AcceptedVersion; Peer reviewed, 2020)
    The heating of the solar chromosphere and corona to the observed high temperatures, imply the presence of ongoing heating that balances the strong radiative and thermal conduction losses expected in the solar atmosphere. ...
  • Coronal Magnetic Field Extrapolation and Topological Analysis of Fine-scale Structures during Solar Flare Precursors 
    He, Wen; Jing, Ju; Wang, Haimin; Nayak, Sushree S.; Prasad, Avijeet (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2023)
    Abstract Magnetic field plays an important role in various solar eruption phenomena. The formation and evolution of the characteristic magnetic field topology in solar eruptions are critical problems that will ...
  • The Coronal Monsoon: Thermal Nonequilibrium Revealed by Periodic Coronal Rain 
    Auchère, Frédéric; Froment, Clara; Soubrie, Elie; Antolin, Patrick; Oliver, Ramon; Pelouze, Gabriel (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2018)
    We report on the discovery of periodic coronal rain in an off-limb sequence of Solar Dynamics Observatory/Atmospheric Imaging Assembly images. The showers are co-spatial and in phase with periodic (6.6 hr) intensity ...
  • Coronal properties of low-Accreting AGNs using Swift, XMM-Newton, and NuSTAR observations 
    Jana, Arghajit; Chatterjee, Arka; Chang, Hsiang-Kuang; Nandi, Prantik; Khatun, Rubinur; Kumari, Neeraj; Naik, Sachindra; Safi-Harb, Samar; Ricci, Claudio (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2023)
  • Coronal Seismology Using Damping of Propagating Kink Waves 
    Pascoe, D.J.; Van Doorsselaere, T.; de Moortel, Ineke (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2022)
    We consider the use of propagating kink waves, such as those observed by the Coronal Multi-channel Polarimeter, as a diagnostic technique. The transverse structuring of the plasma may be inferred by the frequency-dependent ...
  • Cosmic Acceleration from a Two-Component Dark Matter Superfluid 
    Ziegenhorn, Alexander Christopher (Master thesis / Masteroppgave, 2020)
    We investigate the cosmological implications of a two-component dark matter superfluid as proposed by Ferreira et al. (2019). Through contact interactions between the axion-like particles in these components, a late-time ...