SIMBAD references

2009ApJ...695.1183M - Astrophys. J., 695, 1183-1190 (2009/April-3)

Visual orbit of the low-mass binary GJ 164 AB.

MARTINACHE F., ROJAS-AYALA B., IRELAND M.J., LLOYD J.P. and TUTHILL P.G.

Abstract (from CDS):

We report seven successful observations of the astrometric binary GJ 164 AB system with aperture masking interferometry. The companion, with a near-infrared contrast of 5:1 was detected beyond the formal diffraction limit. Combined with astrometric observations from the literature, these observations fix the parallax of the system, and allow a model-independent mass determination of both components. We find the mass of GJ 164 B to be 0.096±0.008 M. With data taken with the newly commissioned TripleSpec spectrograph, we examine GJ 164's near-infrared spectral features and compare them to a sample of M dwarfs of known metallicity. Models are not consistent with color and mass, requiring a very young age to accommodate a secondary too luminous, a scenario ruled out by the kinematics.

Abstract Copyright:

Journal keyword(s): stars: low-mass, brown dwarfs - techniques: high angular resolution - techniques: spectroscopic

Simbad objects: 8

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2020.08.03-20:56:26

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