2021MNRAS.501..911F

Query : 2021MNRAS.501..911F

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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Number of rows : 1
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 WISE J163940.83-684738.6 BD* 16 39 40.83744 -68 47 38.6376           Y0pec 24 0

Query : 2021MNRAS.501..911F

Basic data :
WISE J163940.83-684738.6 -- Brown Dwarf
Other object types: otypes_help 		BD* (2012ApJ), MIR (WISEA,WISE), * (CNS5)
ICRS coord. (ep=J2000) : 		16 39 40.83744 -68 47 38.6376 (Middle-IR) [ 1000 1000 90 ] D 2012yCat.2311....0C
FK4 coord. (ep=B1950 eq=1950) : 		16 34 21.43283 -68 39 08.0283 [ 1000 1000 90 ]
Gal coord. (ep=J2000) : 		321.20426910 -14.48101739 [ 1000 1000 90 ]
Proper motions mas/yr : 		579.090 -3104.54 [12.52 12.25 90] D 2018ApJ...867..109M
Parallaxes (mas): 		202.3 [3.1] D 2014ApJ...796...39T
Spectral type: 		Y0pec D 2015ApJ...804...92S
Fluxes (2) :
J 20.57 [0.05] C 2014ApJ...796...39T
H 20.59 [0.11] D 2017ApJ...842..118L
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Identifiers (3) :
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CNS5 4091 WISEA J163940.84-684739.4 WISE J163940.83-684738.6

References (24 between 1850 and 2026) (Total 24)
Simbad bibliographic survey began in 1850 for stars (at least bright stars) and in 1983 for all other objects (outside the solar system).
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Distance : 1    Plx : 2    PM : 2   

   

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WISEA J163940.84-684739.4 WISE J163940.83-684738.6

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