Infrared observations of the remarkable main-sequence star HD 98800

Details Infrared observations of the remarkable main-sequence star HD 98800 Infrared observations of the remarkable main-sequence star HD 98800

Mar 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993apj...406l..25z&link_type=abstract

Astrophysical Journal, Part 2 - Letters (ISSN 0004-637X), vol. 406, no. 1, p. L25-L28.

Astronomy and Astrophysics

Astronomy

47

Infrared Astronomy, Infrared Stars, Late Stars, Main Sequence Stars, Stellar Envelopes, Stellar Spectrophotometry, Cosmic Dust, Stellar Luminosity, Stellar Spectra

Scientific paper

We verified that the IRAS source near HD 98800 is, in fact, coincident with this K5 V star to better than 1 arcsec at a wavelength of 10 micron. Thus about 10 percent of the energy of the multiple-star system HD 98800 emerges at IRAS wavelengths. This percentage is the largest known at any main-sequence star, and the implied mass in dust particles orbiting a few AU from HD 98800 is about six orders of magnitude greater than the mass of the zodiacal dust in the inner solar system. We suggest a few mechanisms that might account for the particles, but, basically, their origin and maintenance are not understood. In many ways, HD 98800 is the most unusual source in the IRAS catalogs.

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