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

October 2004 • 2004ApJ...614L..77S

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

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.

Links

• SIMBAD http://simbad.u-strasbg.fr/simbo.pl?bibcode=2004ApJ...614L..77S
• DATA https://irsa.ipac.caltech.edu/bibdata/2004/S/2004ApJ...614L..77S.html
• ELECTR https://doi.org/10.1086%2F425324