Browsing Institutt for teoretisk astrofysikk by Title

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  • BeyondPlanck: VIII. Efficient sidelobe convolution and corrections through spin harmonics 
    Galloway, Mathew; Reinecke, M.; Andersen, Kristian Joten; Aurvik, Ragnhild; Banerji, Ranajoy; Bersanelli, M.; Bertocco, S.; Brilenkov, Maksym; Carbone, M.; Colombo, L.P.L.; Eriksen, Hans Kristian Kamfjord; Eskilt, Johannes Røsok; Foss, Marie Kristine; Franceschet, C.; Fuskeland, Unni; Galeotta, S.; Gerakakis, S.; Gjerløw, Eirik; Hensley, B.; Herman, Daniel Christopher; Iacobellis, M.; Ieronymaki, M.; Ihle, Håvard Tveit; Jewell, J.B.; Karakci, Ata; Keihänen, Elina; Keskitalo, R.; Maggio, G.; Maino, D.; Maris, M.; Mennella, A.; Paradiso, S.; Partridge, B.; San, Metin; Suur-Uski, A.-S.; Svalheim, Trygve Leithe; Tavagnacco, D.; Thommesen, Harald; Watts, Duncan; Wehus, Ingunn Kathrine; Zacchei, A. (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2023)
    We introduce a new formulation of the Conviqt convolution algorithm in terms of spin harmonics, and apply this to the problem of sidelobe correction for B EYOND P LANCK , the first end-to-end Bayesian Gibbs sampling framework ...
  • BeyondPlanck: X. Planck Low Frequency Instrument frequency maps with sample-based error propagation 
    Basyrov, Artem; Suur-Uski, A.-S.; Colombo, L.P.L.; Eskilt, Johannes Røsok; Paradiso, S.; Andersen, Kristian Joten; Aurvik, Ragnhild; Banerji, Ranajoy; Bersanelli, M.; Bertocco, S.; Brilenkov, Maksym; Carbone, M.; Eriksen, Hans Kristian Kamfjord; Foss, Marie Kristine; Franceschet, C.; Fuskeland, Unni; Galeotta, S.; Galloway, Mathew; Gerakakis, S.; Gjerløw, Eirik; Hensley, B.; Herman, Daniel Christopher; Iacobellis, M.; Ieronymaki, M.; Ihle, Håvard Tveit; Jewell, J.B.; Karakci, Ata; Keihänen, Elina; Keskitalo, R.; Maggio, G.; Maino, D.; Maris, M.; Partridge, B.; Reinecke, M.; Svalheim, Trygve Leithe; Tavagnacco, D.; Thommesen, Harald; Watts, Duncan; Wehus, Ingunn Kathrine; Zacchei, A. (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2023)
    We present Planck Low Frequency Instrument (LFI) frequency sky maps derived within the B EYOND P LANCK framework. This framework draws samples from a global posterior distribution that includes instrumental, astrophysical, ...
  • BeyondPlanck: XI. Bayesian CMB analysis with sample-based end-to-end error propagation 
    Colombo, L.P.L.; Eskilt, Johannes Røsok; Paradiso, S.; Thommesen, Harald; Andersen, Kristian Joten; Aurvik, Ragnhild; Banerji, Ranajoy; Basyrov, Artem; Bersanelli, M.; Bertocco, S.; Brilenkov, Maksym; Carbone, M.; Eriksen, Hans Kristian Kamfjord; Foss, Marie Kristine; Franceschet, C.; Fuskeland, Unni; Galeotta, S.; Galloway, Mathew; Gerakakis, S.; Gjerløw, Eirik; Hensley, B.; Herman, Daniel Christopher; Iacobellis, M.; Ieronymaki, M.; Ihle, Håvard Tveit; Jewell, J.B.; Karakci, Ata; Keihänen, Elina; Keskitalo, R.; Maggio, G.; Maino, D.; Maris, M.; Partridge, B.; Reinecke, M.; Suur-Uski, A.-S.; Svalheim, Trygve Leithe; Tavagnacco, D.; Watts, Duncan; Wehus, Ingunn Kathrine; Zacchei, A. (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2023)
  • BeyondPlanck: XII. Cosmological parameter constraints with end-to-end error propagation 
    Paradiso, S.; Colombo, L.P.L.; Andersen, Kristian Joten; Aurvik, Ragnhild; Banerji, Ranajoy; Basyrov, Artem; Bersanelli, M.; Bertocco, S.; Brilenkov, Maksym; Carbone, M.; Eriksen, Hans Kristian Kamfjord; Eskilt, Johannes Røsok; Foss, Marie Kristine; Franceschet, C.; Fuskeland, Unni; Galeotta, S.; Galloway, Mathew; Gerakakis, S.; Gjerløw, Eirik; Hensley, B.; Herman, Daniel Christopher; Iacobellis, M.; Ieronymaki, M.; Ihle, Håvard Tveit; Jewell, J.B.; Karakci, Ata; Keihänen, Elina; Keskitalo, R.; Maggio, G.; Maino, D.; Maris, M.; Partridge, B.; Reinecke, M.; San, Metin; Suur-Uski, A.-S.; Svalheim, Trygve Leithe; Tavagnacco, D.; Thommesen, Harald; Watts, Duncan; Wehus, Ingunn Kathrine; Zacchei, A. (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2023)
    We present cosmological parameter constraints estimated using the Bayesian B EYOND P LANCK analysis framework. This method supports seamless end-to-end error propagation from raw time-ordered data onto final cosmological ...
  • BeyondPlanck: XIII. Intensity foreground sampling, degeneracies, and priors 
    Andersen, Kristian Joten; Herman, Daniel Christopher; Aurvik, Ragnhild; Banerji, Ranajoy; Basyrov, Artem; Bersanelli, M.; Bertocco, S.; Brilenkov, Maksym; Carbone, M.; Colombo, L.P.L.; Eriksen, Hans Kristian Kamfjord; Eskilt, Johannes Røsok; Foss, Marie Kristine; Franceschet, C.; Fuskeland, Unni; Galeotta, S.; Galloway, Mathew; Gerakakis, S.; Gjerløw, Eirik; Hensley, B.; Iacobellis, M.; Ieronymaki, M.; Ihle, Håvard Tveit; Jewell, J.B.; Karakci, Ata; Keihänen, Elina; Keskitalo, R.; Lunde, Jonas Gahr Sturtzel; Maggio, G.; Maino, D.; Maris, M.; Mennella, A.; Paradiso, S.; Partridge, B.; Reinecke, M.; San, Metin; Stutzer, Nils-Ole; Suur-Uski, A.-S.; Svalheim, Trygve Leithe; Tavagnacco, D.; Thommesen, Harald; Watts, Duncan; Wehus, Ingunn Kathrine; Zacchei, A. (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2023)
    We present the intensity foreground algorithms and model employed within the B EYOND P LANCK analysis framework. The B EYOND P LANCK analysis is aimed at integrating component separation and instrumental parameter sampling ...
  • BeyondPlanck: XIV. Polarized foreground emission between 30 and 70 GHz 
    Svalheim, Trygve Leithe; Andersen, Kristian Joten; Aurvik, Ragnhild; Banerji, Ranajoy; Bersanelli, M.; Bertocco, S.; Brilenkov, Maksym; Carbone, M.; Colombo, L.P.L.; Eriksen, Hans Kristian Kamfjord; Foss, Marie Kristine; Franceschet, C.; Fuskeland, Unni; Galeotta, S.; Galloway, Mathew; Gerakakis, S.; Gjerløw, Eirik; Hensley, B.; Herman, Daniel Christopher; Iacobellis, M.; Ieronymaki, M.; Ihle, Håvard Tveit; Jewell, J.B.; Karakci, Ata; Keihänen, Elina; Keskitalo, R.; Maggio, G.; Maino, D.; Maris, M.; Paradiso, S.; Partridge, B.; Reinecke, M.; Suur-Uski, A.-S.; Tavagnacco, D.; Thommesen, Harald; Watts, Duncan; Wehus, Ingunn Kathrine; Zacchei, A. (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2023)
    Using the Planck Low Frequency Instrument (LFI) and WMAP data within the global Bayesian B EYOND P LANCK framework, we constrained the polarized foreground emission between 30 and 70 GHz. We combined, for the first time, ...
  • BeyondPlanck: XV. Limits on large-scale polarized anomalous microwave emission from Planck LFI and WMAP 
    Herman, Daniel Christopher; Hensley, B.; Andersen, Kristian Joten; Aurvik, Ragnhild; Banerji, Ranajoy; Bersanelli, M.; Bertocco, S.; Brilenkov, Maksym; Carbone, M.; Colombo, L.P.L.; Eriksen, Hans Kristian Kamfjord; Foss, Marie Kristine; Fuskeland, Unni; Galeotta, S.; Galloway, Mathew; Gerakakis, S.; Gjerløw, Eirik; Iacobellis, M.; Ieronymaki, M.; Ihle, Håvard Tveit; Jewell, J.B.; Karakci, Ata; Keihänen, Elina; Keskitalo, R.; Maggio, G.; Maino, D.; Maris, M.; Paradiso, S.; Partridge, B.; Reinecke, M.; Suur-Uski, A.-S.; Svalheim, Trygve Leithe; Tavagnacco, D.; Thommesen, Harald; Wehus, Ingunn Kathrine; Zacchei, A. (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2023)
    We constrained the level of polarized anomalous microwave emission (AME) on large angular scales using Planck Low-Frequency Instrument (LFI) and WMAP polarization data within a Bayesian cosmic microwave background (CMB) ...
  • Biased tracers as a probe of beyond-ΛCDM cosmologies 
    Hassani, Farbod; Adamek, Julian; Durrer, Ruth; Kunz, Martin (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2022)
    Cosmological models beyond ΛCDM, such as those featuring massive neutrinos or modifications of gravity, often display a characteristic change (scale-dependent suppression or enhancement) in the matter power spectrum when ...
  • Bimetric variational principle for general relativity 
    Jimenez, Jose Beltran; Golovnev, A.; Karčiauskas, Mindaugas; Koivisto, Tomi Sebastian (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2012)
    The bimetric variational principle is a subtle reinterpretation of general relativity that assumes the spacetime connection to be generated by an independent metric. Unlike the so-called Palatini formalism that promotes ...
  • Black holes with scalar hair in light of the Event Horizon Telescope 
    Khodadi, Mohsen; Allahyari, Alireza; Vagnozzi, Sunny; Mota, David (Journal article / Tidsskriftartikkel / AcceptedVersion; Peer reviewed, 2020)
    Searching for violations of the no-hair theorem (NHT) is a powerful way to test gravity, and more generally fundamental physics, particularly with regards to the existence of additional scalar fields. The first observation ...
  • Bombs and Flares at the Surface and Lower Atmosphere of the Sun 
    Hansteen, Viggo; Archontis, Vasilis; Mendes Domingos Pereira, Tiago; Carlsson, Mats; Rouppe van der Voort, Luc; Leenaarts, Jorrit (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2017)
    A spectacular manifestation of solar activity is the appearance of transient brightenings in the far wings of the Hα line, known as Ellerman bombs (EBs). Recent observations obtained by the Interface Region Imaging ...
  • Breaking cosmic degeneracies: Disentangling neutrinos and modified gravity with kinematic information 
    Hagstotz, Steffen; Gronke, Max Balthasar; Mota, David; Baldi, Marco (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2019)
    Searches for modified gravity in the large-scale structure try to detect the enhanced amplitude of density fluctuations caused by the fifth force present in many of these theories. Neutrinos, on the other hand, suppress ...
  • Breaking degeneracies with the Sunyaev-Zeldovich full bispectrum 
    Ravenni, Andrea; Rizzato, Matteo; Radinovic, Sladana; Liguori, Michele; Lacasa, Fabien; Sellentin, Elena (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2021)
    Non-Gaussian (NG) statistics of the thermal Sunyaev-Zeldovich (tSZ) effect carry significant information which is not contained in the power spectrum. Here, we perform a joint Fisher analysis of the tSZ power spectrum and ...
  • Breaking the Vainshtein screening in clusters of galaxies 
    Salzano, Vincenzo; Mota, David; Capoziello, S.; Donahue, Megan (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2017)
    © 2017 American Physical Society
  • Bridging the gap: Capturing the Lyα Counterpart of a Type-II Spicule and its Heating Evolution with VAULT2.0 and IRIS Observations 
    Chintzoglou, G.; De Pontieu, Bart Walter; Martinez-Sykora, Juan; Pereira, Tiago Mendes Domingos; Vourlidas, A.; Beltran, Samuel Tun (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2018)
    We present results from an observing campaign in support of the VAULT2.0 sounding rocket launch on 2014 September 30. VAULT2.0 is a Lyα (1216 Å) spectroheliograph capable of providing spectroheliograms at high cadence. Lyα ...
  • A bright-lensed galaxy at z = 5.4 with strong Ly α emission 
    McGreer, Ian D; Clément, Benjamin; Mainali, Ramesh; Stark, Daniel P.; Gronke, Max Balthasar; Dijkstra, Mark; Fan, Xiaohui; Bian, Fuyan; Frye, Brenda; Jiang, Linhua; Kneib, Jean-Paul; Limousin, Marceau; Walth, Gregory (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2018)
    We present a detailed study of an unusually bright, lensed galaxy at z = 5.424 discovered within the CFHTLS imaging survey. With an observed flux ofiAB =23.0, J141446.82+544631.9 is one of the brightest galaxies known at ...
  • Bright-Moon sky as a wide-field linear Polarimetric flat source for calibration 
    Maharana, S.; Kiehlmann, S.; Blinov, D.; Pelgrims, V.; Pavlidou, V.; Tassis, K.; Kypriotakis, J.A.; Ramaprakash, A.N.; Anche, R.M.; Basyrov, Artem; Deka, K.; Eriksen, Hans Kristian Kamfjord; Ghosh, T.; Gjerløw, Eirik; Mandarakas, N.; Ntormousi, E.; Panopoulou, G.V.; Papadaki, A.; Pearson, T.; Potter, S.B.; Readhead, A.C.S.; Skalidis, R.; Wehus, Ingunn Kathrine (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2023)
    Context. Next-generation wide-field optical polarimeters such as Wide-Area Linear Optical Polarimeters (WALOPs) have a field of view (FoV) of tens of arcminutes. Wide-field polarimetric flat sources are essential to the ...
  • C III] Emission in Star-forming Galaxies Near and Far 
    Rigby, J. R.; Bayliss, M. B.; Gladders, M. D.; Sharon, K.; Wuyts, E; Dahle, Håkon; Johnson, T.; Peña-Guerrero, M. (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2015)
    We measure [C iii] 1907, C iii] 1909 Å emission lines in 11 gravitationally lensed star-forming galaxies at z ~ 1.6–3, finding much lower equivalent widths than previously reported for fainter lensed galaxies. While it is ...
  • C/2014 UN271 (Bernardinelli-Bernstein): The Nearly Spherical Cow of Comets 
    Bernardinelli, Pedro H.; Bernstein, Gary M.; Montet, Benjamin T.; Weryk, Robert; Wainscoat, Richard; Aguena, Michel; Allam, Sahar; Andrade-Oliveira, F.; Annis, J.; Avila, S.; Bertin, E.; Brooks, D.; Burke, David L.; Carnero Rosell, Aurelio; Carrasco Kind, Matias; Carretero, Jorge; Cawthon, R.; Conselice, Christopher; Costanzi, M.; da Costa, L. N.; Pereira, Maria Elidaiana da Silva; De Vicente, J.; Diehl, Herman T.; Everett, S.; Ferrero, Ismael; Flaugher, B.; Frieman, J.; García-Bellido, Juan; Gaztañaga, Enrique; Gerdes, David W.; Gruen, Daniel; Gruendl, Robert A.; Gschwend, J.; Gutierrez, G.; Hinton, Samuel R.; Hollowood, Devon L.; Honscheid, Klaus; James, D. J.; Kuehn, Kyler; Kuropatkin, Nikolay; Lahav, Ofer; Maia, Marcio A. G.; Marshall, Jennifer L.; Menanteau, Felipe; Miquel, Ramon; Morgan, Robert; Ogando, Ricardo L. C.; Paz-Chinchón, Francisco; Pieres, Adriano; Plazas Malagón, A. A.; Rodriguez-Monroy, M.; Romer, A. K.; Roodman, A.; Sanchez, E.; Schubnell, M.; Serrano, S.; Sevilla-Noarbe, Ignacio; Smith, M.; Soares-Santos, Marcelle; Suchyta, E.; Swanson, Molly E. C.; Tarlé, Gregory; To, Chun-Hao; Troxel, M. A.; Varga, T. N.; Walker, A. R.; Zhang, Y. (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2021)
  • Calibration of Transition-edge Sensor (TES) Bolometer Arrays with Application to CLASS 
    Appel, John W.; Bennett, Charles L.; Brewer, Michael K.; Bustos, Ricardo; Chan, Manwei; Chuss, David T.; Cleary, Joseph; Couto, Jullianna D.; Dahal, Sumit; Datta, Rahul; Denis, Kevin; Eimer, Joseph; Essinger-Hileman, Thomas; Harrington, Kathleen; Iuliano, Jeffrey; Li, Yunyang; Marriage, Tobias A.; Núñez, Carolina; Osumi, Keisuke; Padilla, Ivan L.; Petroff, Matthew A.; Rostem, Karwan; Valle, Deniz A. N.; Watts, Duncan; Weiland, Janet L.; Wollack, Edward J.; Xu, Zhilei (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2022)
    The current and future cosmic microwave background (CMB) experiments fielding kilopixel arrays of transition-edge sensor (TES) bolometers require accurate and robust gain calibration methods. We simplify and refactor the ...