Comprehensive Analysis of HD 105, A Young Solar System Analog

Marshall, J. P. and Milli, J. and Choquet, E. and del Burgo, C. and Kennedy, G. M. and Matra, L. and Ertel, S. and Boccaletti, A. (2018) Comprehensive Analysis of HD 105, A Young Solar System Analog. The Astrophysical Journal, 869 (1). pp. 1-12. ISSN 0004-637X


Abstract

HD 105 is a nearby, pre-main-sequence G0 star hosting a moderately bright debris disk (Ldust/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.


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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Faculty/School / Institute/Centre: Historic - Computational Engineering and Science Research Centre (CESRC) (1 Jul 2013 - 31 Jul 2018)
Faculty/School / Institute/Centre: Historic - Computational Engineering and Science Research Centre (CESRC) (1 Jul 2013 - 31 Jul 2018)
Date Deposited: 06 Jul 2022 02:56
Last Modified: 12 Jul 2022 01:19
Uncontrolled Keywords: circumstellar matter; planetary systems; stars: individual (HD 105)
Fields of Research (2008): 02 Physical Sciences > 0201 Astronomical and Space Sciences > 020110 Stellar Astronomy and Planetary Systems
02 Physical Sciences > 0201 Astronomical and Space Sciences > 020108 Planetary Science (excl. Extraterrestrial Geology)
02 Physical Sciences > 0201 Astronomical and Space Sciences > 020101 Astrobiology
Fields of Research (2020): 51 PHYSICAL SCIENCES > 5199 Other physical sciences > 519999 Other physical sciences not elsewhere classified
51 PHYSICAL SCIENCES > 5101 Astronomical sciences > 510109 Stellar astronomy and planetary systems
51 PHYSICAL SCIENCES > 5101 Astronomical sciences > 510101 Astrobiology
Identification Number or DOI: https://doi.org/10.3847/1538-4357
URI: http://eprints.usq.edu.au/id/eprint/49414

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