FIRST HST FOC IMAGES OF THE LOW-MASS COMPANION OF THE ASTROMETRIC BINARY GLIESE-623/

Authors
BARBIERI C DEMARCHI G NOTA A CORRAIN G HACK W RAGAZZONI R MACCHETTO D
Citation
C. Barbieri et al., FIRST HST FOC IMAGES OF THE LOW-MASS COMPANION OF THE ASTROMETRIC BINARY GLIESE-623/, Astronomy and astrophysics, 315(3), 1996, pp. 418-420
Citations number
12
Categorie Soggetti
Astronomy & Astrophysics
Journal title
Astronomy and astrophysics → ACNP
ISSN journal
00046361
Volume
315
Issue
3
Year of publication
1996
Pages
418 - 420
Database
ISI
SICI code
0004-6361(1996)315:3<418:FHFIOT>2.0.ZU;2-F
Abstract
We have resolved the astrometric binary Gliese 623 into two components , by direct imaging in the visible band, with the COSTAR corrected FOG . The images clearly show the faint companion Gliese 623B, with a deri ved absolute magnitude of M(V) = 16.17 +/- 0.10, at a distance of 0.33 '' from the primary (namely at 2.51 AU, assuming a parallax of pi = 0 ''.132, i.e. a distance of 7.6 pc). From the mass-luminosity relation ship of Henry and McCarthy (1993), the photometric mass of the seconda ry is 0.098 solar masses.