K. R. Stapelfeldt et al. 2004 ApJS 154 458 doi:10.1086/423135
K. R. Stapelfeldt1, E. K. Holmes1,2,3, C. Chen1,2, G. H. Rieke4, K. Y. L. Su4, D. C. Hines4,5, M. W. Werner1, C. A. Beichman1, M. Jura6, D. L. Padgett7, J. A. Stansberry4, G. Bendo4, J. Cadien4, M. Marengo8, T. Thompson1, T. Velusamy1, C. Backus1, M. Blaylock4, E. Egami4, C. W. Engelbracht4, D. T. Frayer7, K. D. Gordon4, J. Keene1,7, W. B. Latter7, T. Megeath8, K. Misselt4, J. E. Morrison4, J. Muzerolle4, A. Noriega-Crespo7, J. Van Cleve9 and E. T. Young4
Show affiliationsWe present Spitzer Space Telescope early release observations of Fomalhaut, a nearby A-type star with dusty circumstellar debris. The disk is spatially resolved at 24, 70, and 160 μm using the Multiband Imaging Photometer for Spitzer (MIPS). While the disk orientation and outer radius are comparable to values measured in the submillimeter, the disk inner radius cannot be precisely defined: the central hole in the submillimeter ring is at least partially filled with emission from warm dust, seen in Spitzer Infrared Spectrograph (IRS) 17.5-34 μm spectra and MIPS 24 μm images. The disk surface brightness becomes increasingly asymmetric toward shorter wavelengths, with the south-southeast ansa always brighter than the north-northwest one. This asymmetry may reflect perturbations on the disk by an unseen interior planet.
circumstellar matter; infrared: stars; planetary systems; stars: individual (Fomalhaut)
Issue 1 (2004 September)
Received 2004 April 1, accepted for publication 2004 June 7
K. R. Stapelfeldt et al. 2004 ApJS 154 458
R. A. Pinto and S. Flach 2007 EPL 79 66002
C. H. Chen et al. 2007 ApJ 666 466
C. H. Chen et al. 2005 ApJ 623 493
Larry Kirby 2009 ApJ 694 1056
V. Belokurov et al. 2007 ApJ 654 897
M Velli and F Pruneti 1997 Plasma Phys. Control. Fusion 39 B317
M R Benoit et al 2008 Phys. Biol. 5 046007
Derek Vollmer 2009 Environ. Res. Lett. 4 024003
V R Chechetkin and A Y Turygin 1994 J. Phys. A: Math. Gen. 27 4875