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Comprehensive analysis of HD 105, a young solar system analog

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Marshall, J. P., Milli, J., Choquet, É., Burgo, C. del, Kennedy, Grant M., Matrà, L., Ertel, S. and Boccaletti, A. (2018) Comprehensive analysis of HD 105, a young solar system analog. The Astrophysical Journal, 869 (1). 10. doi:10.3847/1538-4357/aaec6a

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Official URL: http://dx.doi.org/10.3847/1538-4357/aaec6a

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Abstract

HD 105 is a nearby, pre-main-sequence G0 star hosting a moderately bright debris disk (L dust/L ⋆ ∼ 2.6 × 10‑4). The star and its surroundings might therefore be considered an analog of the young solar system. We refine the stellar parameters based on an improved Gaia parallax distance and identify it as a pre-main-sequence star with an age of 50 ± 16 Myr. The circumstellar disk was marginally resolved by Herschel/PACS imaging at far-infrared wavelengths. Here, we present an archival ALMA observation at 1.3 mm, revealing the extent and orientation of the disk. We also present Hubble Space Telescope (HST)/NICMOS and VLT/SPHERE near-infrared images, where we recover the disk in scattered light at the ≥5σ level. This was achieved by employing a novel annular averaging technique and is the first time this has been achieved for a disk in scattered light. Simultaneous modeling of the available photometry, disk architecture, and detection in scattered light allow better determination of the disk’s architecture, and dust grain minimum size, composition, and albedo. We measure the dust albedo to lie between 0.19 and 0.06, the lower value being consistent with Edgeworth–Kuiper Belt objects.

Item Type: Journal Article
Subjects: Q Science > QB Astronomy
Divisions: Faculty of Science > Physics
Library of Congress Subject Headings (LCSH): Circumstellar matter, Planetary systems
Journal or Publication Title: The Astrophysical Journal
Publisher: Institute of Physics Publishing, Inc.
ISSN: 0004-637X
Official Date: 6 December 2018
Dates:
DateEvent
6 December 2018Published
25 October 2018Accepted
Date of first compliant deposit: 7 January 2019
Volume: 869
Number: 1
Article Number: 10
DOI: 10.3847/1538-4357/aaec6a
Status: Peer Reviewed
Publication Status: Published
Publisher Statement: © 2018. The American Astronomical Society. All rights reserved.
Access rights to Published version: Restricted or Subscription Access
RIOXX Funder/Project Grant:
Project/Grant IDRIOXX Funder NameFunder ID
MOST104-2628-M-001-004-MY3Ministry of Science and Technology, Taiwanhttp://dx.doi.org/10.13039/501100004663
MOST107-2119-M- 001-031-MY3Ministry of Science and Technology, Taiwanhttp://dx.doi.org/10.13039/501100004663
AS-IA-106- M03Academia Sinicahttp://dx.doi.org/10.13039/501100001869
HF2-51355[NASA] National Aeronautics and Space Administrationhttp://dx.doi.org/10.13039/100000104
NAS5-26555[NASA] National Aeronautics and Space Administrationhttp://dx.doi.org/10.13039/100000104
HST-AR-12652[NASA] National Aeronautics and Space Administrationhttp://dx.doi.org/10.13039/100000104
HST-GO-11136[NASA] National Aeronautics and Space Administrationhttp://dx.doi.org/10.13039/100000104
HST-GO-13855[NASA] National Aeronautics and Space Administrationhttp://dx.doi.org/10.13039/100000104
HST-GO-13331[NASA] National Aeronautics and Space Administrationhttp://dx.doi.org/10.13039/100000104
CB-2012-183007Consejo Nacional de Ciencia y Tecnologíahttp://dx.doi.org/10.13039/501100003141
UNSPECIFIED[RS] Royal Societyhttp://dx.doi.org/10.13039/501100000288
UNSPECIFIEDSmithsonian Institutionhttp://dx.doi.org/10.13039/100000014
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