Observations of G29 - 38 at 10 microns

Journal Article · Sun Jul 01 04:00:00 EDT 1990 · Astrophysical Journal; (USA)

DOI:https://doi.org/10.1086/185769· OSTI ID:6577672

Telesco, C M; Joy, M; Sisk, C ^[1]

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1. NASA, Marshall Space Flight Center, Huntsville, AL (USA)

The white dwarf G29 - 38 was shown by Zuckerman and Becklin (1987) to have an IR excess at 1-5 microns, possibly due to a spatially unresolved brown dwarf companion. Using the NASA-MSFC 20-pixel bolometer array at the IRTF, a 10.8-micron flux density of 9.5 + or - 3.1 mJy is detected from G29 - 38. This value, combined with more recent 10-micron data obtained by others, implies that 10-micron emission from G29 - 38 is at least twice that expected from a brown dwarf having an effective temperature in the range 1100-1500 K, as previously estimated. The possibility that the IR excess is emitted by dust rather than a brown dwarf is therefore strengthened. 10 refs.

• OSTI ID: 6577672
• Journal Information: Astrophysical Journal; (USA), Journal Name: Astrophysical Journal; (USA) Vol. 358; ISSN ASJOA; ISSN 0004-637X
• Country of Publication: United States
• Language: English

Related Subjects

640102* -- Astrophysics & Cosmology-- Stars & Quasi-Stellar
Radio & X-Ray Sources
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
BINARY STARS
BOLOMETERS
COSMIC DUST
DUSTS
DWARF STARS
ELECTROMAGNETIC RADIATION
ENERGY SPECTRA
FLUX DENSITY
INFRARED RADIATION
INTERSTELLAR SPACE
MEASURING INSTRUMENTS
ORIGIN
RADIATIONS
SPACE
SPECTRA
STARS
WHITE DWARF STARS