The radial velocity of the white dwarf Giclas 29-38

Details The radial velocity of the white dwarf Giclas 29-38 The radial velocity of the white dwarf Giclas 29-38

Sep 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992apj...396l..31b&link_type=abstract

Astrophysical Journal, Part 2 - Letters (ISSN 0004-637X), vol. 396, no. 1, Sept. 1, 1992, p. L31-L34.

Astronomy and Astrophysics

Astrophysics

11

Brown Dwarf Stars, Infrared Radiation, Radial Velocity, Stellar Rotation, White Dwarf Stars, Near Infrared Radiation, Stellar Magnitude, Stellar Spectrophotometry

Scientific paper

The white dwarf Giclas 29-38 displays mysterious excess infrared emission at wavelengths between 2 and 10 microns. The radial velocity of G29-38 was measured 15 times during the latter half of 1990 and 5 times during the latter half of 1991. The present data, in combination with those of Graham et al. (1990), which were obtained during the latter half of 1989, imply that the radial velocity of G29-38 is probably varying with a period of about 11.2 months and total amplitude of about 10 km/s. If confirmed, the variation is likely due to either a high-mass brown dwarf or low-mass white dwarf companion.

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