2001A&A...374L..12S


Query : 2001A&A...374L..12S

2001A&A...374L..12S - Astronomy and Astrophysics, volume 374, L12-15 (2001/8-1)

Search for nearby stars among proper motion stars selected by optical-to-infrared photometry. I. Discovery of LHS 2090 at spectroscopic distance of d∼6pc.

SCHOLZ R.-D., MEUSINGER H. and JAHREISS H.

Abstract (from CDS):

We present the discovery of a previously unknown very nearby star - LHS 2090 at a distance of only d=6pc. In order to find nearby (i.e. d<25pc) red dwarfs, we re-identified high proper motion stars (µ>0.18arcsec/yr) from the NLTT catalogue (Luyten, 1979-1980, NLTT catalog, I/98) in optical Digitized Sky Survey data for two different epochs and in the 2MASS data base. Only proper motion stars with large R-Ks colour index and with relatively bright infrared magnitudes (Ks<10) were selected for follow-up spectroscopy. The low-resolution spectrum of LHS 2090 and its large proper motion (0.79arcsec/yr) classify this star as an M6.5 dwarf. The resulting spectroscopic distance estimate from comparing the infrared JHKs magnitudes of LHS 2090 with absolute magnitudes of M6.5 dwarfs is 6.0±1.1pc assuming an uncertainty in absolute magnitude of ±0.4mag.

Abstract Copyright:

Journal keyword(s): astrometry and celestial mechanics: astrometry - astronomical data base: surveys - stars: late-type - stars: low mass, brown dwarfs

Simbad objects: 4

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Number of rows : 4
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2021
#notes
1 APMPM J0237-5928 PM* 02 36 32.4596402682 -59 28 05.545239213       13.961   M4.5V 18 0
2 G 51-15 Er* 08 29 49.3528237575 +26 46 33.626773321   16.87   14.736   M6.5Ve 260 0
3 LP 368-128 PM* 09 00 23.5469323169 +21 50 04.898204213   17.3 16.100 14.09 11.85 M6.5Ve 50 0
4 DENIS J104814.6-395606 LM* 10 48 14.5734267094 -39 56 06.843210566     17.532 15.051 12.67 M8.5Ve: 117 0

    Equat.    Gal    SGal    Ecl

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2021.07.29-16:39:09

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