COMPREHENSIVE ANALYSIS OF HD 105, A YOUNG SOLAR SYSTEM ANALOG - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue The Astrophysical journal letters Année : 2018

COMPREHENSIVE ANALYSIS OF HD 105, A YOUNG SOLAR SYSTEM ANALOG

Résumé

HD 105 is a nearby, pre-main sequence G0 star hosting a moderately bright debris disc (L dust /L ∼ 2.6 × 10 −4). HD 105 and its surroundings might therefore be considered an analogue of the young Solar System. We refine the stellar parameters based on an improved Gaia parallax distance, identify it as a pre-main sequence star with an age of 50 ± 16 Myr. The circumstellar disc 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 disc. We also present HST/NICMOS and VLT/SPHERE near-infrared images, where we recover the disc in scattered light at the ≥ 5-σ level. This was achieved by employing a novel annular averaging technique, and is the first time this has been achieved for a disc in scattered light. Simultaneous modelling of the available photometry, disc architecture, and detection in scattered light allow better determination of the disc'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.
Fichier principal
Vignette du fichier
1811.06440.pdf (1.22 Mo) Télécharger le fichier
Origine : Fichiers produits par l'(les) auteur(s)
Loading...

Dates et versions

hal-02118183 , version 1 (02-05-2019)

Identifiants

Citer

J. P. Marshall, J. Milli, E. Choquet, C. Del Del Burgo, G. M Kennedy, et al.. COMPREHENSIVE ANALYSIS OF HD 105, A YOUNG SOLAR SYSTEM ANALOG. The Astrophysical journal letters, 2018, 869 (1), pp.10. ⟨10.3847/1538-4357/aaec6a⟩. ⟨hal-02118183⟩
38 Consultations
50 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More