Browsing Institutt for teoretisk astrofysikk by Title

Now showing items 76-95 of 1278

  • Bandpass mismatch error for satellite CMB experiments II: correcting for the spurious signal 
    Banerji, Ranajoy; Patanchon, Guillaume; Delabrouille, Jacques; Hazumi, Masashi; Hoang, Duc Thuong; Ishino, Hirokazu; Matsumura, Tomotake (Journal article / Tidsskriftartikkel / AcceptedVersion; Peer reviewed, 2019)
    Future Cosmic Microwave Background (CMB) satellite missions aim at using the B-mode polarisation signal to measure the tensor-to-scalar ratio r with a sensitivity σ(r) of the order of ≤ 10-2. Small uncertainties in the ...
  • Bar resilience to flybys in a cosmological framework 
    Zana, Tommaso; Dotti, Massimo; Capelo, Pedro R.; Mayer, Lucio; Haardt, Francesco; Shen, Sijing; Bonoli, Silivia (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2018)
    It has been proposed that close interactions with satellite galaxies can significantly perturb the morphology of the main galaxy. However, the dynamics of an already formed bar following the interaction with the external ...
  • Barred galaxies in cosmological zoom-in simulations: the importance of feedback 
    Zana, Tommaso; Capelo, Pedro R.; Dotti, Massimo; Mayer, Lucio; Lupi, Alessandro; Haardt, Francesco; Bonoli, Silivia; Shen, Sijing (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2019)
    Bars are a key factor in the long-term evolution of spiral galaxies, in their unique role in redistributing angular momentum and transporting gas and stars on large scales. The Eris-suite simulations are cosmological ...
  • Bayesian Analysis of Hemispherical Power Asymmetry in the Cosmic Microwave Background 
    Hoftuft, Jostein (Master thesis / Masteroppgave, 2009)
    The cosmic microwave background (CMB) radiation at 2.7 K is the leftover radiation from the Big Bang. By studying this radiation we can extract much information about the universe we live in. CMB experiments over the last ...
  • Bayesian Data Analysis for Intensity Mapping and CMB Experiments 
    Ihle, Håvard Tveit (Doctoral thesis / Doktoravhandling, 2021)
    In the developing field of line intensity mapping (LIM), an approach to measuring the aggregate emission from various spectral lines in the early universe, as well as when searching for primordial B-modes in the Cosmic ...
  • Beacons into the Cosmic Dark Ages: Boosted Transmission of Lyα from UV Bright Galaxies at z ≳ 7 
    Mason, Charlotte A.; Treu, Tommaso; De Barros, Stephane; Dijkstra, Mark; Fontana, Adriano; Mesinger, Andrei; Pentericci, Laura; Trenti, Michele; Vanzella, Eros (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2018)
    Recent detections of Lyman alpha (Lyα) emission from z > 7.5 galaxies were somewhat unexpected given a dearth of previous non-detections in this era when the intergalactic medium (IGM) is still highly neutral. But these ...
  • “Beads-on-a-string” Star Formation Tied to One of the Most Powerful Active Galactic Nucleus Outbursts Observed in a Cool-core Galaxy Cluster 
    Omoruyi, Osase; Tremblay, Grant R.; Combes, Francoise; Davis, Timothy A.; Gladders, Michael D.; Vikhlinin, Alexey; Nulsen, Paul; Kharb, Preeti; Baum, Stefi A.; O’Dea, Christopher P.; Sharon, Keren; Terrazas, Bryan A.; Nevin, Rebecca; Schechter, Aimee L.; Zuhone, John A.; McDonald, Michael; Dahle, Håkon; Bayliss, Matthew B.; Connor, Thomas; Florian, Michael; Rigby, Jane R.; Vaddi, Sravani (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2024)
    With two central galaxies engaged in a major merger and a remarkable chain of 19 young stellar superclusters wound around them in projection, the galaxy cluster SDSS J1531+3414 (z = 0.335) offers an excellent laboratory ...
  • Beam electrons as a source of Hα flare ribbons 
    Druett, Malcolm; Scullion, Eamon; Zharkova, Valentina; Matthews, Sarah; Zharkov, Sergei; Rouppe van der Voort, Luc (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2017)
    The observations of solar flare onsets show rapid increase of hard and soft X-rays, ultra-violet emission with large Doppler blue shifts associated with plasma upflows, and Hα hydrogen emission with red shifts up to 1–4 Å. ...
  • Behaviour of molecular hydrogen emission in three solar flares 
    Mulay, Sargam M.; Fletcher, Lyndsay; Hudson, Hugh; Labrosse, Nicolas (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2023)
    ABSTRACT We have systematically investigated ultraviolet (UV) emission from molecular hydrogen (H2) using the Interface Region Imaging Spectrograph (IRIS), during three X-ray flares of C5.1, C9.7, and X1.0 classes ...
  • Being a Bat in Space: Measuring Distances Inside Active Galactic Nuclei Using Reverberation Mapping 
    Sommer, Natalia Eiré (Master thesis / Masteroppgave, 2016)
  • Being KLEVER at cosmic noon: Ionized gas outflows are inconspicuous in low-mass star-forming galaxies but prominent in massive AGN hosts 
    Concas, Alice; Maiolino, Roberto; Curti, Mirko; Hayden-Pawson, Connor; Cirasuolo, Michele; Jones, Gareth C; Mercurio, Amata; Belfiore, Francesco; Cresci, Giovanni; Cullen, Fergus; Mannucci, Filippo; Marconi, Alessandro; Cappellari, Michele; Cicone, Claudia; Peng, Yingjie; Troncoso, Paulina (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2022)
    We investigate the presence of ionized gas outflows in a sample of 141 main-sequence star-forming galaxies at 1.2 < z < 2.6 from the KLEVER (KMOS Lensed Emission Lines and VElocity Review) survey. Our sample covers an ...
  • Beyond the 3rd moment: a practical study of using lensing convergence CDFs for cosmology with DES Y3 
    Anbajagane, D.; Chang, C.; Banerjee, A.; Abel, T.; Gatti, M.; Ajani, V.; Alarcon, A.; Amon, A.; Baxter, E.J.; Bechtol, K.; Becker, M.R.; Bernstein, G.M.; Campos, A.; Carnero Rosell, A.; Carrasco Kind, M.; Chen, R.; Choi, A.; Davis, C.; DeRose, J.; Diehl, H.T.; Dodelson, S.; Doux, C.; Drlica-Wagner, A.; Eckert, K.; Elvin-Poole, J.; Everett, S.; Ferté, A.; Gruen, D.; Gruendl, R.A.; Harrison, I.; Hartley, W.G.; Huff, E.M.; Jain, B.; Jarvis, M.; Jeffrey, N.; Kacprzak, T.; Kokron, N.; Kuropatkin, N.; Leget, P.-F.; MacCrann, N.; McCullough, J.; Myles, J.; Navarro-Alsina, A.; Pandey, S.; Prat, J.; Raveri, M.; Rollins, R.P.; Roodman, A.; Rykoff, E.S.; Sánchez, C.; Secco, L.F.; Sevilla-Noarbe, I.; Sheldon, E.; Shin, T.; Troxel, M.A.; Tutusaus, I.; Whiteway, L.; Yanny, B.; Yin, B.; Zhang, Y.; Abbott, T.M.C.; Allam, S.; Aguena, M.; Alves, O.; Andrade-Oliveira, F.; Annis, J.; Bacon, D.; Blazek, J.; Brooks, D.; Cawthon, R.; da Costa, L.N.; Pereira, M.E.S.; Davis, T.M.; Desai, S.; Doel, P.; Ferrero, Ismael; Frieman, J.; Giannini, G.; Gutierrez, G.; Hinton, S.R.; Hollowood, D.L.; Honscheid, K.; James, D.J.; Kuehn, K.; Lahav, O.; Marshall, J.L.; Mena-Fernández, J.; Menanteau, F.; Miquel, R.; Palmese, A.; Pieres, A.; Plazas Malagón, A.A.; Reil, K.; Sanchez, E.; Smith, M.; Swanson, M.E.C.; Tarle, G.; Wiseman, P. (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2023)
  • BeyondPlanck: I. Global Bayesian analysis of the Planck Low Frequency Instrument data 
    Andersen, Kristian Joten; 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.; Herman, Daniel Christopher; 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 describe the B EYOND P LANCK project in terms of our motivation, methodology, and main products, and provide a guide to a set of companion papers that describe each result in more detail. Building directly on experience ...
  • BeyondPlanck: II. CMB mapmaking through Gibbs sampling 
    Keihänen, Elina; Suur-Uski, A.-S.; Andersen, Kristian Joten; 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.; Herman, Daniel Christopher; Iacobellis, M.; Ieronymaki, M.; Ihle, Håvard Tveit; Jewell, J.B.; Karakci, Ata; Keskitalo, R.; Maggio, G.; Maino, D.; Maris, M.; Mennella, A.; Paradiso, S.; Partridge, B.; Reinecke, M.; San, Metin; Svalheim, Trygve Leithe; Tavagnacco, D.; Thommesen, Harald; Watts, Duncan; Wehus, Ingunn Kathrine; Zacchei, A. (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2023)
    We present a Gibbs sampling solution to the mapmaking problem for cosmic microwave background (CMB) measurements that builds on existing destriping methodology. Gibbs sampling breaks the computationally heavy destriping ...
  • BeyondPlanck: III. Commander3 
    Galloway, Mathew; 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.; 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 describe the computational infrastructure for end-to-end Bayesian cosmic microwave background (CMB) analysis implemented by the BeyondPlanck Collaboration. The code is called Commander3 . It provides a statistically ...
  • BeyondPlanck: IV. Simulations and validation 
    Brilenkov, Maksym; Fornazier, K.S.F.; Hergt, L.T.; Hoerning, G.A.; Marins, A.; Murokoshi, T.; Rahman, F.; Stutzer, Nils-Ole; Zhou, Y.; Abdalla, F.B.; Andersen, Kristian Joten; Aurvik, Ragnhild; Banerji, Ranajoy; Basyrov, Artem; Battista, A.; Bersanelli, M.; Bertocco, S.; Bollanos, S.; 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.; Herman, Daniel Christopher; Hoang, T.D.; 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; Tomasi, M.; Watts, Duncan; Wehus, Ingunn Kathrine; Zacchei, A. (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2023)
    End-to-end simulations play a key role in the analysis of any high-sensitivity cosmic microwave background (CMB) experiment, providing high-fidelity systematic error propagation capabilities that are unmatched by any other ...
  • BeyondPlanck: IX. Bandpass and beam leakage corrections 
    Svalheim, Trygve Leithe; Zonca, A.; 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)
    We discuss the treatment of bandpass and beam leakage corrections in the Bayesian B EYOND P LANCK cosmic microwave background (CMB) analysis pipeline as applied to the Planck LFI measurements. As a preparatory step, we ...
  • BeyondPlanck: V. Minimal ADC Corrections for Planck LFI 
    Herman, Daniel Christopher; Watson, R.A.; 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.; 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.; Reinecke, M.; 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 describe the correction procedure for Analog-to-Digital Converter (ADC) differential non-linearities (DNL) adopted in the Bayesian end-to-end B EYOND P LANCK analysis framework. This method is nearly identical to that ...
  • BeyondPlanck: VI. Noise characterization and modeling 
    Ihle, Håvard Tveit; Bersanelli, M.; Franceschet, C.; Gjerløw, Eirik; Andersen, Kristian Joten; Aurvik, Ragnhild; Banerji, Ranajoy; Bertocco, S.; Brilenkov, Maksym; Carbone, M.; Colombo, L.P.L.; Eriksen, Hans Kristian Kamfjord; Eskilt, Johannes Røsok; Foss, Marie Kristine; Fuskeland, Unni; Galeotta, S.; Galloway, Mathew; Gerakakis, S.; Hensley, B.; Herman, Daniel Christopher; Iacobellis, M.; Ieronymaki, M.; Jewell, J.B.; Karakci, Ata; Keihänen, Elina; Keskitalo, R.; Maggio, G.; Maino, D.; Maris, M.; Mennella, A.; Paradiso, S.; 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 a Bayesian method for estimating instrumental noise parameters and propagating noise uncertainties within the global BEYONDPLANCK Gibbs sampling framework, which we applied to Planck Low Frequency Instrument ...
  • BeyondPlanck: VII. Bayesian estimation of gain and absolute calibration for cosmic microwave background experiments 
    Gjerløw, Eirik; Ihle, Håvard Tveit; Galeotta, S.; 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; Galloway, Mathew; Gerakakis, S.; Hensley, B.; Herman, Daniel Christopher; Iacobellis, M.; Ieronymaki, M.; 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; Watts, Duncan; Wehus, Ingunn Kathrine; Zacchei, A. (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2023)
    We present a Bayesian calibration algorithm for cosmic microwave background (CMB) observations as implemented within the global end-to-end B EYOND P LANCK framework and applied to the Planck Low Frequency Instrument (LFI) ...