Hubble Space Telescope Observations of the Very Low Mass Companion to Gliese 105A

Details Hubble Space Telescope Observations of the Very Low Mass Companion to Gliese 105A Hubble Space Telescope Observations of the Very Low Mass Companion to Gliese 105A

Oct 1995

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995apj...452l.125g&link_type=abstract

Astrophysical Journal Letters v.452, p.L125

Astronomy and Astrophysics

Astronomy

10

Stars: Binaries: Close, Stars: Low-Mass, Brown Dwarfs, Stars: Individual Name: Gliese 105A

Scientific paper

Hubble Space Telescope images of the astrometric binary Gl 105A confirm the previous ground-based detection of a faint, very red companion (Gl 105C) located 3."39 from Gl 105A at P.A. 290 deg. The instrumental magnitudes of Gl 105C are V555 = 16.86 and I814 = 13.54. The observed position of Gl 105C differs significantly from the positions expected from current astrometric solutions. No other companions brighter than I814 = 20.3 are seen between 1" and 13."5 from Gl 105A. Using the M dwarf model atmospheres of Allard and Hauschildt, we obtain for Gl 105C a standard color of V - I = 4.6, which suggests a spectral type of M7 V.

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