Multiband GPI Imaging of the HR 4796A Debris Disk
| Autor: | Alycia J. Weinberger, Robert J. De Rosa, Abhijith Rajan, Katherine B. Follette, Timothy J. Rodigas, Gael M. Roudier, Maxwell A. Millar-Blanchaer, Jessica A. Arnold, Paul Kalas, Kimberly Ward-Duong, Jason J. Wang, David J. Wilner, Zachary H. Draper, Glenn Schneider, Pascale Hibon, Elodie Choquet, Jeffrey Chilcote, Thomas M. Esposito, Schuyler Wolff, Franck Marchis, Juan Sebastián Bruzzone, Johan Mazoyer, Gaspard Duchêne, Pauline Arriaga, Marshall D. Perrin, Charles A. Poteet, Justin Hom, Bin Ren, Laurent Pueyo, Christine Chen, Rémi Soummer, Fredrik T. Rantakyrö, Dean C. Hines, Christopher C. Stark, Michael P. Fitzgerald, Vanessa P. Bailey, Jennifer Patience, Julien Milli, Brenda C. Matthews |
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| Přispěvatelé: | Space Telescope Science Institute (STSci), Johns Hopkins University (JHU), Laboratoire d'études spatiales et d'instrumentation en astrophysique (LESIA (UMR_8109)), Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université de Paris (UP), Department of Astronomy [Berkeley], University of California [Berkeley], University of California-University of California, Institut de Planétologie et d'Astrophysique de Grenoble (IPAG), Centre National d'Études Spatiales [Toulouse] (CNES)-Observatoire des Sciences de l'Univers de Grenoble (OSUG ), Institut national des sciences de l'Univers (INSU - CNRS)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Université Grenoble Alpes (UGA)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Université Grenoble Alpes (UGA), Arizona State University [Tempe] (ASU), Department of Physics and Astronomy [UCLA, Los Angeles], University of California [Los Angeles] (UCLA), Caltech Department of Astronomy [Pasadena], California Institute of Technology (CALTECH), Carnegie Institution for Science [Washington], Jet Propulsion Laboratory (JPL), NASA-California Institute of Technology (CALTECH), Physics and Astronomy Department, The University of Western Ontario (UWO), University of Western Ontario (UWO), Department of Physics, University of Notre Dame, Notre Dame, Indiana 46556, Laboratoire d'Astrophysique de Marseille (LAM), Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Aix Marseille Université (AMU)-Centre National d'Études Spatiales [Toulouse] (CNES), European Southern Observatory [Santiago] (ESO), European Southern Observatory (ESO), University of Victoria [Canada] (UVIC), Physics and Astronomy Department, Amherst College, Search for Extraterrestrial Intelligence Institute (SETI), Gemini Observatory [Southern Operations Center], Association of Universities for Research in Astronomy (AURA), Department of Terrestrial Magnetism [Carnegie Institution], Steward Observatory, University of Arizona, Harvard-Smithsonian Center for Astrophysics (CfA), Harvard University [Cambridge]-Smithsonian Institution, Laboratoire d'études spatiales et d'instrumentation en astrophysique = Laboratory of Space Studies and Instrumentation in Astrophysics (LESIA), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité), University of California [Berkeley] (UC Berkeley), University of California (UC)-University of California (UC), Institut national des sciences de l'Univers (INSU - CNRS)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Université Grenoble Alpes (UGA)-Météo-France -Institut national des sciences de l'Univers (INSU - CNRS)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Université Grenoble Alpes (UGA)-Météo-France, Carnegie Institution for Science, Aix Marseille Université (AMU)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS), Harvard University-Smithsonian Institution |
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
010504 meteorology & atmospheric sciences
[SDU.ASTR.EP]Sciences of the Universe [physics]/Astrophysics [astro-ph]/Earth and Planetary Astrophysics [astro-ph.EP] FOS: Physical sciences 01 natural sciences Measure (mathematics) symbols.namesake Debris disks 0103 physical sciences Gemini Planet Imager 010303 astronomy & astrophysics Solar and Stellar Astrophysics (astro-ph.SR) Astrophysics::Galaxy Astrophysics 0105 earth and related environmental sciences Earth and Planetary Astrophysics (astro-ph.EP) Physics Debris disk Scattering [SDU.ASTR.SR]Sciences of the Universe [physics]/Astrophysics [astro-ph]/Solar and Stellar Astrophysics [astro-ph.SR] Astronomy and Astrophysics Markov chain Monte Carlo Function (mathematics) Circumstellar matter Computational physics Wavelength Astrophysics - Solar and Stellar Astrophysics 13. Climate action Space and Planetary Science symbols SPHERES Astrophysics::Earth and Planetary Astrophysics Planetary system formation Coronagraphic imaging Astrophysics - Earth and Planetary Astrophysics |
| Zdroj: | The Astrophysical Journal The Astrophysical Journal, American Astronomical Society, 2020, 898 (1), pp.55. ⟨10.3847/1538-4357/ab9aba⟩ The Astrophysical Journal, 2020, 898 (1), pp.55. ⟨10.3847/1538-4357/ab9aba⟩ The Astrophysical Journal, 898(1), 55 |
| ISSN: | 0004-637X 1538-4357 |
| DOI: | 10.3847/1538-4357/ab9aba⟩ |
| Popis: | We have obtained Gemini Planet Imager (GPI) J-, H-, K1-, and K2-Spec observations of the iconic debris ring around the young, main-sequence star HR 4796A. We applied several point-spread function (PSF) subtraction techniques to the observations (Mask-and-Interpolate, RDI-NMF, RDI-KLIP, and ADI-KLIP) to measure the geometric parameters and the scattering phase function for the disk. To understand the systematic errors associated with PSF subtraction, we also forward-modeled the observations using a Markov Chain Monte Carlo framework and a simple model for the disk. We found that measurements of the disk geometric parameters were robust, with all of our analyses yielding consistent results; however, measurements of the scattering phase function were challenging to reconstruct from PSF-subtracted images, despite extensive testing. As a result, we estimated the scattering phase function using disk modeling. We searched for a dependence of the scattering phase function with respect to the GPI filters but found none. We compared the H-band scattering phase function with that measured by Hubble Space Telescope STIS at visual wavelengths and discovered a blue color at small scattering angles and a red color at large scattering angles, consistent with predictions and laboratory measurements of large grains. Finally, we successfully modeled the SPHERE H2 HR 4796A scattered phase function using a distribution of hollow spheres composed of silicates, carbon, and metallic iron. 34 pages, 30 figures, accepted in ApJ |
| Databáze: | OpenAIRE |
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