Browsing Institutt for teoretisk astrofysikk by Title

Now showing items 627-646 of 1278

  • Kepler Object of Interest Network: I. First results combining ground- and space-based observations of Kepler systems with transit timing variations 
    von Essen, Carolina; Ofir, A.; Dreizler, S.; Agol, E.; Freudenthal, J.; Hernández, J.; Wedemeyer, Sven; Parkash, V.; Deeg, H. J.; Hoyer, S.; Morris, B. M.; Becker, A. C.; Sun, L.; Gu, S. H.; Herrero, E.; Tal-Or, L.; Poppenhaeger, K.; Mallonn, M.; Albrecht, S.; Khalafinejad, S.; Boumis, P.; Delgado-Correal, C.; Fabrycky, D. C.; Janulis, R.; Lalitha, S.; Liakos, A.; Mikolaitis, Š.; Moyano D’Angelo, M. L.; Sokov, E.; Pakštienė, E.; Popov, A.; Krushinsky, V.; Ribas, I.; Rodríguez S., M. M.; Rusov, S.; Sokova, I.; Tautvaišienė, G.; Wang, X. (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2018)
    During its four years of photometric observations, the Kepler space telescope detected thousands of exoplanets and exoplanet candidates. One of Kepler’s greatest heritages has been the confirmation and characterization of ...
  • Kepler Object of Interest Network: II. Photodynamical modelling of Kepler-9 over 8 years of transit observations 
    Freudenthal, Jantje; von Essen, Carolina; Dreizler, Stefan; Wedemeyer, Sven; Agol, Eric; Morris, Brett M.; Becker, Andrew C.; Mallonn, Matthias; Hoyer, Sergio; Ofir, Aviv; Tal-Or, Lev; Deeg, Hans Jörg; Herrero, Enrique; Ribas, Ignasi; Khalafinejad, Sara; Hernández, Jesús V.; Rodríguez, Silvio M.M. (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2018)
    Context: The Kepler Object of Interest Network (KOINet) is a multi-site network of telescopes around the globe organised to follow up transiting planet-candidate Kepler objects of interest (KOIs) with large transit timing ...
  • Kepler Object of Interest Network: III. Kepler-82f: a new non-transiting 21 M⊕ planet from photodynamical modelling 
    Freudenthal, J.; von Essen, Carolina; Ofir, A.; Dreizler, S.; Agol, E.; Wedemeyer, Sven; Morris, B. M.; Becker, A. C.; Deeg, H. J.; Hoyer, S.; Mallonn, M.; Poppenhaeger, K.; Herrero, E.; Ribas, I.; Boumis, P.; Liakos, A. (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2019)
    Context. The Kepler Object of Interest Network (KOINet) is a multi-site network of telescopes around the globe organised for follow-up observations of transiting planet candidate Kepler objects of interest with large transit ...
  • KiDS and Euclid: Cosmological implications of a pseudo angular power spectrum analysis of KiDS-1000 cosmic shear tomography 
    Loureiro, Arthur; Whittaker, L.; Spurio Mancini, A.; Joachimi, B.; Cuceu, A.; Asgari, M.; Stölzner, B.; Tröster, T.; Wright, A.H.; Bilicki, M.; Dvornik, A.; Giblin, B.; Heymans, C.; Hildebrandt, H.; Shan, H.; Amara, A.; Auricchio, N.; Bodendorf, C.; Bonino, D.; Branchini, E.; Brescia, Massimo; Capobianco, V.; Carbone, C.; Carretero, J.; Castellano, M.; Cavuoti, Stefano; Cimatti, A.; Cledassou, R.; Congedo, G.; Conversi, L.; Copin, Y.; Corcione, L.; Cropper, M.; Da Silva, A.; Douspis, M.; Dubath, F.; Duncan, C.A.J.; Dupac, X.; Dusini, S.; Farrens, S.; Ferriol, S.; Fosalba, P.; Frailis, M.; Franceschi, E.; Fumana, M.; Garilli, B.; Gillis, B.; Giocoli, C.; Grazian, A.; Grupp, F.; Haugan, Stein Vidar Hagfors; Holmes, W.; Hormuth, F.; Jahnke, K.; Kümmel, M.; Kermiche, S.; Kiessling, A.; Kilbinger, M.; Kitching, T.; Kuijken, K.; Kunz, M.; Kurki-Suonio, Hannu; Ligori, S.; Lilje, Per Barth; Lloro, I.; Mansutti, O.; Marggraf, O.; Markovic, K.; Marulli, F.; Massey, Richard; Meneghetti, M.; Meylan, G.; Moresco, M.; Morin, B.; Moscardini, L.; Munari, E.; Niemi, S.M.; Padilla, C.; Paltani, S.; Pasian, F.; Pedersen, K.; Pettorino, V.; Pires, S.; Poncet, M.; Popa, L.; Raison, F.; Rhodes, J.; Rix, H.; Roncarelli, M.; Saglia, R.; Schneider, P.; Secroun, A.; Serrano, S.; Sirignano, C.; Sirri, G.; Stanco, L.; Starck, J.L.; Tallada-Crespí, P.; Taylor, A.N.; Tereno, I.; Toledo-Moreo, R.; Torradeflot, F.; Valentijn, E.A.; Wang, Y.; Welikala, N.; Weller, J.; Zamorani, G.; Zoubian, J.; Andreon, S.; Baldi, M.; Camera, S.; Farinelli, R.; Polenta, G.; Tessore, N. (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2022)
    We present a tomographic weak lensing analysis of the Kilo Degree Survey Data Release 4 (KiDS-1000), using a new pseudo angular power spectrum estimator (pseudo- C ℓ ) under development for the ESA Euclid mission. Over ...
  • Kinematic Sunyaev-Zel'dovich effect with ACT, DES, and BOSS: A novel hybrid estimator 
    Mallaby-Kay, M.; Amodeo, S.; Hill, J.C.; Aguena, M.; Allam, S.; Alves, O.; Annis, J.; Battaglia, N.; Battistelli, E.S.; Baxter, E.J.; Bechtol, K.; Becker, M.R.; Bertin, E.; Bond, J.R.; Brooks, D.; Calabrese, E.; Carnero Rosell, A.; Carrasco Kind, M.; Carretero, J.; Choi, A.; Crocce, M.; da Costa, L.N.; Pereira, M.E.S.; De Vicente, J.; Desai, S.; Dietrich, J.P.; Doel, P.; Doux, C.; Drlica-Wagner, A.; Dunkley, J.; Elvin-Poole, J.; Everett, S.; Ferraro, S.; Ferrero, Ismael; Frieman, J.; Gallardo, P.A.; García-Bellido, J.; Giannini, G.; Gruen, D.; Gruendl, R.A.; Gutierrez, G.; Hinton, S.R.; Hollowood, D.L.; James, D.J.; Kosowsky, A.; Kuehn, K.; Lokken, M.; Louis, T.; Marshall, J.L.; McMahon, J.; Mena-Fernández, J.; Menanteau, F.; Miquel, R.; Moodley, K.; Mroczkowski, T.; Næss, Sigurd Kirkevold; Niemack, M.D.; Ogando, R.L.C.; Page, L.; Pandey, S.; Pieres, A.; Plazas Malagón, A.A.; Raveri, M.; Rodriguez-Monroy, M.; Rykoff, E.S.; Samuroff, S.; Sanchez, E.; Schaan, E.; Sevilla-Noarbe, I.; Sheldon, E.; Sifón, C.; Smith, M.; Soares-Santos, M.; Sobreira, F.; Suchyta, E.; Tarle, G.; To, C.; Vargas, C.; Vavagiakis, E.M.; Weaverdyck, N.; Weller, J.; Wiseman, P.; Yanny, B. (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2023)
    The kinematic and thermal Sunyaev-Zel’dovich (kSZ and tSZ) effects probe the abundance and thermodynamics of ionized gas in galaxies and clusters. We present a new hybrid estimator to measure the kSZ effect by combining ...
  • Kinematics of Magnetic Bright Features in the Solar Photosphere 
    Jafarzadeh, Shahin; Solanki, S. K.; Cameron, R. H.; Barthol, P.; Blanco Rodriguez, J.; del Toro Iniesta, J. C.; Gandorfer, A.; Gizon, L; Hirzberger, J.; Knölker, M.; Martinez Pillet, V.; Orozco Suarez, D.; Riethmüller, T. L.; Schmidt, W.; van Noort, M. (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2017)
    © 2017. The American Astronomical Society. All rights reserved.
  • Kinetic screening of fields and stability of NEC violating configurations 
    Forfang, Peder (Master thesis / Masteroppgave, 2017)
    Following the discovery of the late-time acceleration, a multitude of extensions to General Relativity have been developed, seeking to shed light on this new phenomenon. Some of these models involve couplings to ordinary ...
  • Kosmologi og vekselvirkninger mellom baryoner, mørk materie og mørk energi 
    Oppen, Henrik (Master thesis / Masteroppgave, 2014)
    Studier av vekselvirkningsmodeller for baryonsk materie, mørk materie og mørk energi. Hovedfokus på stabilitet for universmodeller, sammenligning med observasjonelle data og konsekvenser for strukturformasjoner.
  • Large format imaging spectrograph for the Large Submillimeter Telescope (LST) 
    Kohno, Kotaro; Kawabe, Ryohei; Tamura, Yoichi; Endo, Akira; Baselmans, Jochem J. A.; Karatsu, Kenichi; Inoue, Akio K.; Moriwaki, Kana; Hayatsu, Natsuki H.; Yoshida, Naoki; Yoshimura, Yuki; Hatsukade, Bunyo; Umehata, Hideki; Oshima, Tai; Takekoshi, Tatsuya; Taniguchi, Akio; Klaassen, Pamela D.; Mroczkowski, Tony; Cicone, Claudia; Bertoldi, Frank; Dannerbauer, Helmut; Tosaki, Tomoka (Journal article / Tidsskriftartikkel / AcceptedVersion; Peer reviewed, 2020)
    We present a conceptual study of a large format imaging spectrograph for next-generation large (50-m class) single-dish telescopes, i.e., the Large Submillimeter Telescope (LST) and Atacama Large Aperture Submillimeter ...
  • Large scale coherent magnetohydrodynamic oscillations in a sunspot 
    Stangalini, Marco; Verth, G.; Fedun, V.; Aldhafeeri, A.A.; Jess, D.B.; Jafarzadeh, Shahin; Keys, P.H.; Fleck, B.; Terradas, J.; Murabito, M.; Ermolli, I.; Soler, R.; Giorgi, F.; MacBride, C.D. (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2022)
    Abstract Although theoretically predicted, the simultaneous excitation of several resonant modes in sunspots has not been observed. Like any harmonic oscillator, a solar magnetic flux tube can support a variety of resonances, ...
  • Large-scale structure with massive neutrinos and modified gravity: A simulation-based approach 
    Mauland-Hus, Renate (Doctoral thesis / Doktoravhandling, 2023)
    Massive neutrinos and alternative theories of gravity are two seemingly different aspects of cosmological study. On one hand, we have actual particles known to exist, and on the other, a proposed change to the description ...
  • Late Kinetic Decoupling of Dark Matter 
    Ihle, Håvard Tveit (Master thesis / Masteroppgave, 2016)
    If dark matter, after it has become non-relativistic, scatters elastically with a relativistic heat bath particle, then the resulting pressure leads to acoustic oscillations that suppress the growth of overdensities in the ...
  • The length of the low-redshift standard ruler 
    Verde, Licia; Bernal, José Luis; Heavens, Alan F.; Jimenez, Raul (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2017)
    © 2017 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society
  • Lens Model and Source Reconstruction Reveal the Morphology and Star Formation Distribution in the Cool Spiral LIRG SGAS J143845.1+145407 
    Dunham, Samuel J.; Sharon, Keren; Florian, Michael K.; Rigby, Jane R.; Gladders, Michael D.; Bayliss, Matthew B.; Dahle, Håkon; Johnson, Traci L.; Murray, Katherine; Whitaker, Katherine E.; Wuyts, Eva (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2019)
    We present Hubble Space Telescope (HST) imaging and grism spectroscopy of a strongly lensed LIRG at z = 0.816, SGAS 143845.1+145407, and use the magnification boost of gravitational lensing to study the distribution of ...
  • Lens model and time delay predictions for the sextuply lensed quasar SDSS J2222+2745 
    Sharon, Keren; Bayliss, Matthew B.; Dahle, Håkon; Florian, Michael K.; Gladders, Michael D.; Johnson, Traci L.; Paterno-Mahler, Rachel; Rigby, Jane R.; Whitaker, Katherine E.; Wuyts, Eva (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2017)
    SDSS J2222+2745 is a galaxy cluster at z = 0.49, strongly lensing a quasar at z = 2.805 into six widely separated images. In recent Hubble Space Telescope imaging of the field, we identify additional multiply lensed galaxies ...
  • Lensing without borders – I. A blind comparison of the amplitude of galaxy–galaxy lensing between independent imaging surveys 
    Leauthaud, Alexie; Amon, Alexandra; Singh, S.; Gruen, Daniel; Lange, Johannes Ulf; Huang, Song; Robertson, N. C.; Varga, Tamas Norbert; Luo, Yifei; Heymans, Catherine; Hildebrandt, Helmut; Blake, C.; Aguena, Michel; Allam, Sahar; Andrade-Oliveira, F.; Annis, James; Bertin, Emmanuel; Bhargava, S.; Blazek, J.; Bridle, Sarah L.; Brooks, D.; Burke, David L.; Carnero Rosell, Aurelio; Carrasco Kind, Matias; Carretero, Jorge; Castander, F. J.; Cawthon, Ross; Choi, A.; Costanzi, Matteo; da Costa, L. N.; Pereira, Maria Elidaiana da Silva; Davis, Christopher; De Vicente, Juan; DeRose, J.; Diehl, Herman T.; Dietrich, Jörg P.; Doel, P.; Eckert, K.; Everett, S.; Evrard, August E.; Ferrero, Ismael; Flaugher, B.; Fosalba, Pablo; García-Bellido, Juan; Gatti, M.; Gaztañaga, Enrique; Gruendl, Robert A.; Gschwend, J.; Hartley, William G.; Hollowood, Devon L.; Honscheid, Klaus; Jain, Bhuvnesh; James, D. J.; Jarvis, M.; Joachimi, Benjamin; Kannawadi, A.; Kim, Alex G.; Krause, E.; Kuehn, Kyler; Kuijken, Konrad; Kuropatkin, Nikolay; Lima, M.; MacCrann, Niall; Maia, Marcio A. G.; Makler, Martin; March, Marisa; Marshall, Jennifer L.; Melchior, Peter; Menanteau, Felipe; Miquel, Ramon; Miyatake, Hironao; Mohr, Joseph J.; Moraes, B.; More, S.; Surhud, M.; Morgan, R.; Myles, Justin; Ogando, Ricardo L. C.; Palmese, Antonella; Paz-Chinchón, Francisco; Plazas Malagón, Andrés A.; Prat, Judit; Rau, Markus Michael; Rhodes, Jason D.; Rodriguez-Monroy, Martin; Roodman, A.; Ross, Ashley J.; Samuroff, Simon; Sánchez, Carles; Sanchez, E.; Scarpine, V.; Schlegel, David J.; Schubnell, M.; Serrano, S.; Sevilla-Noarbe, Ignacio; Sifón, Cristóbal; Smith, Mathew; Speagle, J. S.; Suchyta, Eric; Tarlé, Gregory; Thomas, Daniel; Tinker, Jeremy; To, Chun-Hao; Troxel, Michael A.; Van Waerbeke, L.; Vielzeuf, P.; Wright, Angus H. (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2021)
    ABSTRACT Lensing without borders is a cross-survey collaboration created to assess the consistency of galaxy–galaxy lensing signals (ΔΣ) across different data sets and to carry out end-to-end tests of systematic ...
  • Lessons learned from the two largest Galaxy morphological classification catalogues built by convolutional neural networks 
    Cheng, Ting-Yun; Domínguez Sánchez, Helena; Vega-Ferrero, Jesús; Conselice, Christopher J.; Siudek, M.; Aragón-Salamanca, Alfonso; Bernardi, M.; Cooke, Ryan; Ferreira, l.; Huertas-Company, M.; Krywult, J.; Palmese, Antonella; Pieres, Adriano; Plazas Malagón, Andrés A.; Carnero Rosell, Aurelio; Gruen, D.; Thomas, Daniel; Bacon, D.; Brooks, D.; James, David J.; Hollowood, Devon L.; Friedel, D.; Suchyta, Eric; Sanchez, E.; Menanteau, Felipe; Paz-Chinchón, Francisco; Gutierrez, G.; Tarlé, Gregory; Sevilla-Noarbe, Ignacio; Ferrero, Ismael; Annis, J.; Frieman, Josh; García-Bellido, Juan; Mena-Fernández, J.; Honscheid, Klaus; Kuehn, K.; da Costa, Luiz N.; Gatti, M.; Raveri, M.; Pereira, Maria Elidaiana da Silva; Rodríguez-Monroy, M.; Smith, Mathew; Carrasco Kind, Matias; Aguena, Michel; Swanson, Molly E. C.; Weaverdyck, Noah; Doel, P.; Miquel, R.; Ogando, Ricardo L. C.; Gruendl, Robert A.; Allam, Sahar; Hinton, Samuel R.; Dodelson, Scott; Bocquet, S.; Desai, S.; Everett, S.; Scarpine, V. (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2022)
    ABSTRACT We compare the two largest galaxy morphology catalogues, which separate early- and late-type galaxies at intermediate redshift. The two catalogues were built by applying supervised deep learning ...
  • The Light of the TARDIS 
    Hauge, Lars Christian (Master thesis / Masteroppgave, 2015)
    In 2013 a new metric called TARDIS was introduced. This metric was published by Tippet and Tsang, and described a time machine. This thesis uses numerical methods to explore properties of this new metric. We start by ...
  • Line formation in the magnetized solar chromosphere 
    Moe, Thore Espedal (Doctoral thesis / Doktoravhandling, 2023)
    The theme of this thesis has been the use of forward modeling to study the formation of spectral lines in the solar atmosphere, with a particular focus on the chromospheric Ca II 854.2 nm line which is important for magnetic ...
  • Line formation of He I D3 and He I 10 830 Å in a small-scale reconnection event 
    Libbrecht, Tine; Bjørgen, Johan Pires; Leenaarts, Jorrit; de la Cruz Rodríguez, Jaime; Hansteen, Viggo Haraldson; Joshi, Jayant (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2021)
    Context. Ellerman bombs (EBs) and UV bursts are small-scale reconnection events that occur in the region of the upper photosphere to the chromosphere. It has recently been discovered that these events can have emission ...