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Astrometric Discovery of GJ 164B

Show simple item record Pravdo, Steven H. Shaklan, Stuart B. Henry, Todd Benedict, G. Fritz 2008-06-13T21:43:12Z 2008-06-13T21:43:12Z 2004-12-20
dc.identifier.citation The Astrophysical Journal, 617:1323–1329, en_US
dc.description.abstract We discovered a low-mass companion to the M dwarf GJ 164 with the CCD-based imaging system of the Stellar Planet Survey astrometric program. The existence of GJ 164B was confirmed with Hubble Space Telescope NICMOS imaging observations. A high-dispersion spectral observation in V sets a lower limit of Deltam > 2.2 mag between the two components of the system. Based on our parallax value of 82 +/- 8 mas, we derive the following orbital parameters: P = 2.04 +/- 0.03 yr, a = 103 +/- 0.03, and M-total 0.265 +/- 0.020 M-circle dot. The component masses are M-A = 0.170 +/- 0.015 M-circle dot and M-B = 0.095 +/- 0/015 M-circle dot. Based on its mass, colors, and spectral properties, GJ 164B has spectral type M6-M8 V. en_US
dc.description.sponsorship NASA/JPL en_US
dc.language.iso en_US en_US
dc.publisher American Astronomical Society en_US
dc.subject astrometry en_US
dc.subject brown dwarfs en_US
dc.title Astrometric Discovery of GJ 164B en_US
dc.type Article en_US

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