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The Apparent Absence of Forward Scattering in the HD 53143 Debris DiskHD 53143 is a mature Sun-like star and host to a broad disk of dusty debris, including a cold outer ring of planetesimals near 90 au. Unlike most other inclined debris disks imaged at visible wavelengths, the cold disk around HD 53143 appears as disconnected "arcs" of material, with no forward-scattering side detected to date. We present new, deeper Hubble Space Telescope Imaging Spectrograph coronagraphic observations of the HD 53143 debris disk and show that the forward-scattering side of the disk remains undetected. By fitting our KLIP-reduced observations via forward modeling with an optically thin disk model, we show that fitting the visible wavelength images with an azimuthally symmetric disk with unconstrained orientation results in an unphysical edge-on orientation that is at odds with recent ALMA observations, while constraining the orientation to that observed by ALMA results in nearly isotropically scattering dust. We show that the HD 53143 host star exhibits significant stellar variations due to spot rotation and revisit age estimates for this system.
Document ID
20230006868
Acquisition Source
Goddard Space Flight Center
Document Type
Reprint (Version printed in journal)
Authors
Christopher C Stark
(Goddard Space Flight Center Greenbelt, Maryland, United States)
Bin Ren ORCID
(Grenoble Alpes University Saint-Martin-d'Hères, France)
Meredith A MacGregor ORCID
(University of Colorado Boulder Boulder, Colorado, United States)
Ward S Howard ORCID
(University of Colorado Boulder Boulder, Colorado, United States)
Spencer A Hurt ORCID
(University of Oregon Eugene, Oregon, United States)
Alycia J Weinberger ORCID
(Carnegie Institution for Science Washington D.C., District of Columbia, United States)
Glenn Schneider ORCID
(University of Arizona Tucson, Arizona, United States)
Elodie Choquet ORCID
(Aix-Marseille University Marseille, France)
Date Acquired
May 4, 2023
Publication Date
March 14, 2023
Publication Information
Publication: The Astrophysical Journal
Publisher: American Astronomical Society
Volume: 945
Issue: 2
Issue Publication Date: March 14, 2023
ISSN: 0004-637X
e-ISSN: 1538-4357
Subject Category
Astrophysics
Funding Number(s)
WBS: 411672
CONTRACT_GRANT: NAS 526555
Distribution Limits
Public
Copyright
Portions of document may include copyright protected material.
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