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2021MNRAS.501..911F - Mon. Not. R. Astron. Soc., 501, 911-915 (2021/February-2)
The Y dwarf population with HST: unlocking the secrets of our coolest neighbours - I. Overview and first astrometric results.
FONTANIVE C., BEDIN L.R. and BARDALEZ GAGLIUFFI D.C.
Abstract (from CDS):
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 p = 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.
Abstract Copyright: © 2020 The Author(s) Published by Oxford University Press on behalf of Royal Astronomical Society
Journal keyword(s): brown dwarfs - stars: individual: WISE J163940.83-684738.6
Simbad objects: 1
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