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http://hdl.handle.net/20.500.12386/33004
Titolo: | The Y dwarf population with HST: unlocking the secrets of our coolest neighbours - I. Overview and first astrometric results | Autori: | Fontanive, C. BEDIN, Luigi Bardalez Gagliuffi, D. C. |
Data pubblicazione: | 2021 | Rivista: | MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | Numero: | 501 | Fascicolo: | 1 | Da pagina:: | 911 | Abstract: | In this paper, we present our project that aims at determining accurate distances and proper motions for the Y brown dwarf population using the Hubble Space Telescope. We validate the program with our first results, using a single new epoch of observations of the Y0pec dwarf WISE J163940.83-684738.6. These new data allowed us to refine its proper motion and improve the accuracy of its parallax by a factor of three compared to previous determinations, now constrained to ϖ = 211.11 ± 0.56 mas. This newly derived absolute parallax corresponds to a distance of 4.737 ± 0.013 pc, an exquisite and unprecedented precision for faint ultracool Y dwarfs. | URI: | http://hdl.handle.net/20.500.12386/33004 | URL: | https://academic.oup.com/mnras/article/501/1/911/6017306 http://arxiv.org/abs/2011.13873v1 |
ISSN: | 0035-8711 | DOI: | 10.1093/mnras/staa3732 | Bibcode ADS: | 2021MNRAS.501..911F | Fulltext: | open |
È visualizzato nelle collezioni: | 1.01 Articoli in rivista |
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