Near-Infrared Photometry and the Nature of Gliese 105C

Details Near-Infrared Photometry and the Nature of Gliese 105C Near-Infrared Photometry and the Nature of Gliese 105C

Feb 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996apj...458l..41r&link_type=abstract

Astrophysical Journal Letters v.458, p.L41

Astronomy and Astrophysics

Astronomy

6

Stars: Low-Mass, Brown Dwarfs

Scientific paper

In this Letter we present infrared measurements of Gl 105C, the faint, low-mass companion of Gl 105A that was only recently imaged in the visible using optical coronagraphic techniques. Working in the J, H, and K bandpasses and using short exposures (specklegrams), we were able to observe Gl 105C directly, separating it from its nearby, and much brighter, companion. The absolute magnitudes at J, H, and K we determined for this object are 10.57, 9.77, and 9.23, respectively. These magnitudes indicate a mass of 0.095 M&sun;, a value that is sufficient to sustain hydrogen burning. It is probable that Gl 105C is a true star rather than a brown dwarf.

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