exoALMA. VIII. Probabilistic Moment Maps and Data Products Using Nonparametric Linear Models
The Astrophysical Journal Letters, vol. 984, pp. L13
Abstract
Abstract Extracting robust inferences on physical quantities from disk kinematics measured from Doppler-shifted molecular line emission is challenging due to the data’s size and complexity. In this paper, we develop a flexible linear model of the intensity distribution in each frequency channel, accounting for spatial correlations from the point-spread function. The analytic form of the model’s posterior enables probabilistic data products through sampling. Our method debiases peak intensity, peak velocity, and line width maps, particularly in disk substructures that are only partially resolved. These are needed in order to measure disk mass, turbulence, and pressure gradients and detect embedded planets. We analyze HD 135344B, MWC 758, and CQ Tau, finding velocity substructures 50–200 m s−1 greater than with conventional methods. Additionally, we combine our approach with discminer in a case study of J1842. We find that uncertainties in stellar mass and inclination increase by an order of magnitude due to the more realistic noise model. More broadly, our method can be applied to any problem requiring a probabilistic model of an intensity distribution conditioned on a point-spread function.
Authors 35
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Affiliation as printed
School of Physics and Astronomy, Monash University, VIC 3800, Australia; thomas.hilder@monash.edu
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ASTRO-3D · Flatiron Institute · Monash University
Affiliation as printed
Center for Computational Astrophysics, Flatiron Institute, 162 5th Avenue, NY, USA
Centre of Excellence for Astrophysics in Three Dimensions (ASTRO-3D), Melbourne, VIC, Australia
School of Physics and Astronomy, Monash University, VIC 3800, Australia; thomas.hilder@monash.edu
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Affiliation as printed
School of Physics and Astronomy, Monash University, VIC 3800, Australia; thomas.hilder@monash.edu
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Centre National de la Recherche Scientifique · Institut de Planétologie et d'Astrophysique de Grenoble · Université Grenoble Alpes
Affiliation as printed
University Grenoble Alpes, CNRS, IPAG, F-38000 Grenoble, France
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Leiden University · European Southern Observatory · University of Florida · Leiden Observatory
Affiliation as printed
Department of Astronomy, University of Florida, Gainesville, FL 32611, USA
European Southern Observatory, Karl-Schwarzschild-Str. 2, D-85748 Garching bei München, Germany
Leiden Observatory, Leiden University, P.O. Box 9513, NL-2300 RA Leiden, The Netherlands
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Affiliation as printed
School of Physics and Astronomy, Monash University, VIC 3800, Australia; thomas.hilder@monash.edu
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Affiliation as printed
Department of Astronomy, University of Florida, Gainesville, FL 32611, USA
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Massachusetts Institute of Technology
Affiliation as printed
Department of Earth, Atmospheric, and Planetary Sciences, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
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Centre National de la Recherche Scientifique · Université Côte d'Azur · Max Planck Institute for Astronomy · Lagrange Laboratory · Observatoire de la Côte d’Azur
Affiliation as printed
Max-Planck Institute for Astronomy (MPIA), Königstuhl 17, 69117 Heidelberg, Germany
Université Côte d’Azur, Observatoire de la Côte d’Azur, CNRS, Laboratoire Lagrange, France
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National Astronomical Observatory of Japan
Affiliation as printed
National Astronomical Observatory of Japan, 2–21–1 Osawa, Mitaka, Tokyo 181–8588, Japan
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University of Milan · University of Chile
Affiliation as printed
Departamento de Astronomía, Universidad de Chile, Camino El Observatorio 1515, Las Condes, Santiago, Chile
Dipartimento di Fisica, Università degli Studi di Milano, Via Celoria 16, I-20133 Milano, Italy
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Affiliation as printed
School of Physics & Astronomy, University of St. Andrews, North Haugh, St. Andrews KY16 9SS, UK
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Affiliation as printed
Dipartimento di Fisica, Università degli Studi di Milano, Via Celoria 16, I-20133 Milano, Italy
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Centre National de la Recherche Scientifique · Université Côte d'Azur · Lagrange Laboratory · Observatoire de la Côte d’Azur
Affiliation as printed
Université Côte d’Azur, Observatoire de la Côte d’Azur, CNRS, Laboratoire Lagrange, France
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Max Planck Institute for Astronomy
Affiliation as printed
Max-Planck Institute for Astronomy (MPIA), Königstuhl 17, 69117 Heidelberg, Germany
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National Astronomical Observatory of Japan
Affiliation as printed
National Astronomical Observatory of Japan, 2–21–1 Osawa, Mitaka, Tokyo 181–8588, Japan
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Affiliation as printed
Department of Astronomy, University of Florida, Gainesville, FL 32611, USA
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Affiliation as printed
Center for Simulational Physics, The University of Georgia, Athens, GA 30602, USA
Department of Physics and Astronomy, The University of Georgia, Athens, GA 30602, USA
Institute for Artificial Intelligence, The University of Georgia, Athens, GA 30602, USA
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Affiliation as printed
School of Physics and Astronomy, Monash University, VIC 3800, Australia; thomas.hilder@monash.edu
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Affiliation as printed
Department of Astronomy, Columbia University, 538 W. 120th Street, Pupin Hall, New York, NY 10027, USA
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Affiliation as printed
School of Physics and Astronomy, University of Leeds, Leeds, LS2 9JT, UK
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Affiliation as printed
College of Science, Ibaraki University, 2-1-1 Bunkyo, Mito, Ibaraki 310-8512, Japan
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Centre National de la Recherche Scientifique · Institut de Planétologie et d'Astrophysique de Grenoble · Université Grenoble Alpes
Affiliation as printed
University Grenoble Alpes, CNRS, IPAG, F-38000 Grenoble, France
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University of Milan · University of Cambridge
Affiliation as printed
Dipartimento di Fisica, Università degli Studi di Milano, Via Celoria 16, I-20133 Milano, Italy
Institute of Astronomy, University of Cambridge, Madingley Rd, CB30HA, Cambridge, UK
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National Radio Astronomy Observatory
Affiliation as printed
National Radio Astronomy Observatory, Charlottesville, VA 22903, USA
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Affiliation as printed
College of Science, Ibaraki University, 2-1-1 Bunkyo, Mito, Ibaraki 310-8512, Japan
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Affiliation as printed
Dipartimento di Fisica, Università degli Studi di Milano, Via Celoria 16, I-20133 Milano, Italy
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Centre National de la Recherche Scientifique · Université Côte d'Azur · Institut de Planétologie et d'Astrophysique de Grenoble · Lagrange Laboratory · Observatoire de la Côte d’Azur · Université Grenoble Alpes
Affiliation as printed
University Grenoble Alpes, CNRS, IPAG, F-38000 Grenoble, France
Université Côte d’Azur, Observatoire de la Côte d’Azur, CNRS, Laboratoire Lagrange, France
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Massachusetts Institute of Technology
Affiliation as printed
Department of Earth, Atmospheric, and Planetary Sciences, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
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Institute of Astronomy and Astrophysics, Academia Sinica · Academia Sinica
Affiliation as printed
Academia Sinica Institute of Astronomy & Astrophysics, 11F of Astronomy-Mathematics Building, AS/NTU, No. 1, Sec. 4, Roosevelt Rd., Taipei 10617, Taiwan
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Centre National de la Recherche Scientifique · Institut de Planétologie et d'Astrophysique de Grenoble · Université Grenoble Alpes
Affiliation as printed
University Grenoble Alpes, CNRS, IPAG, F-38000 Grenoble, France
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Centre National de la Recherche Scientifique · Université Côte d'Azur · Max Planck Institute for Astronomy · Lagrange Laboratory · Observatoire de la Côte d’Azur
Affiliation as printed
Max-Planck Institute for Astronomy (MPIA), Königstuhl 17, 69117 Heidelberg, Germany
Université Côte d’Azur, Observatoire de la Côte d’Azur, CNRS, Laboratoire Lagrange, France
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Massachusetts Institute of Technology
Affiliation as printed
Department of Earth, Atmospheric, and Planetary Sciences, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
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The Graduate University for Advanced Studies, SOKENDAI · National Astronomical Observatory of Japan
Affiliation as printed
Department of Astronomical Science, The Graduate University for Advanced Studies, SOKENDAI, 2–21–1 Osawa, Mitaka, Tokyo 181–8588, Japan
National Astronomical Observatory of Japan, 2–21–1 Osawa, Mitaka, Tokyo 181–8588, Japan
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Wesleyan University · Pennsylvania State University
Affiliation as printed
Department of Astronomy & Astrophysics, 525 Davey Laboratory, The Pennsylvania State University, University Park, PA 16802, USA
Department of Astronomy, Van Vleck Observatory, Wesleyan University, 96 Foss Hill Drive, Middletown, CT 06459, USA
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