The Serendipitous Discovery of a Debris Disk around the A Dwarf HD 46190

Details The Serendipitous Discovery of a Debris Disk around the A Dwarf HD 46190 The Serendipitous Discovery of a Debris Disk around the A Dwarf HD 46190

Oct 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004apj...614l..77s&link_type=abstract

The Astrophysical Journal, Volume 614, Issue 1, pp. L77-L80.

Astronomy and Astrophysics

Astronomy

8

Stars: Circumstellar Matter, Infrared: Stars, Stars: Individual: Henry Draper Number: Hd 46190

Scientific paper

The Infrared Spectrograph on the Spitzer Space Telescope has observed several A dwarfs as potential standards and cross-calibrators, and one of these stars, HD 46190, shows the spectroscopic signature of a debris disk. The disk produces a spectral excess that can be fitted with a cool blackbody of ~81 K. If the emitting particles are spherical blackbodies, they would lie at a distance of ~82 AU from the central star. The spectrum from the disk can also be fitted with a spectrum rising proportionally with wavelength, and this spectral behavior is consistent with material falling into the inner disk as a result of Poynting-Robertson drag.

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