Excess infrared radiation from a white dwarf - an orbiting brown dwarf?

Details Excess infrared radiation from a white dwarf - an orbiting brown dwarf? Excess infrared radiation from a white dwarf - an orbiting brown dwarf?

Nov 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987natur.330..138z&link_type=abstract

Nature (ISSN 0028-0836), vol. 330, Nov. 12, 1987, p. 138-140. NSF-supported research.

Physics

125

Brown Dwarf Stars, Infrared Radiation, Planetary Systems, White Dwarf Stars, Radiant Flux Density, Stellar Luminosity

Scientific paper

The white dwarf star Giclas 29-38 appears to emit substantial radiation at wavelengths between 2 and 5 microns, far in excess of that expected from an extrapolation of the visual and near-infrared spectrum of the star. The infrared color temperature of the excess radiation is 1.200 + or - 200 K and, at the distance of G29-38, corresponds to a total luminosity of 0.00005 solar luminosities. If the excess 3.5-micron radiation is emitted by a single spherical body at 1,200 K, then its radius is 0.15 solar radii. These characteristics are similar to those that have been calculated for substellar objects called brown dwarfs. The most natural interpretation of the observations is that there is a substellar, somewhat Jupiter-like brown dwarf in orbit around G29-38.

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