The serendipitous discovery of a debris disk around the A dwarf HD 46190

G. C. Sloan, V. Charmandaris, S. B. Fajardo-Acosta, D. L. Shupe, P. W. Morris, K. Y.L. Su, D. C. Hines, J. Rho, C. W. Engelbracht

Research output: Contribution to journalReview articlepeer-review

10 Scopus citations

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 languageEnglish (US)
Pages (from-to)L77-L80
JournalAstrophysical Journal
Volume614
Issue number1 II
DOIs
StatePublished - Oct 10 2004
Externally publishedYes

Keywords

  • Circumstellar matter
  • Infrared: Stars
  • Stars: Individual (HD 46190)

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

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