Abstract
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.
Original language | English (US) |
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Pages (from-to) | L77-L80 |
Journal | Astrophysical Journal |
Volume | 614 |
Issue number | 1 II |
DOIs | |
State | Published - Oct 10 2004 |
Externally published | Yes |
Keywords
- Circumstellar matter
- Infrared: Stars
- Stars: Individual (HD 46190)
ASJC Scopus subject areas
- Astronomy and Astrophysics
- Space and Planetary Science