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arxiv: 1005.3543 · v1 · pith:JUE2J7QBnew · submitted 2010-05-19 · 🌌 astro-ph.EP

The Vega Debris Disc: A view from Herschel

B. Sibthorpe , B.Vandenbussche , J. S.Greaves , E. Pantin , G.Olofsson , B.Acke , M. J. Barlow , J.A.D. L. Blommaert
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J. Bouwman A. Brandeker M.Cohen W.DeMeester W.R. F.Dent J.Di Francesco C.Dominik M. Fridlund W.K.Gear A.M.Glauser H. L.Gomez P. C.Hargrave P.M.Harvey Th. Henning A.M.Heras M. R.Hogerheijde W. S.Holland R. J. Ivison S. J. Leeks T. L. Lim R. Liseau B. C.Matthews D.A.Naylor G. L. Pilbratt E. T. Polehampton S.Regibo P.Royer A. Sicilia-Aguilar B.M. Swinyard C.Waelkens H. J.Walker R.Wesson
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keywords discstructuredebrisherschelrangevegawavelengthangular
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We present five band imaging of the Vega debris disc obtained using the Herschel Space Observatory. These data span a wavelength range of 70-500 um with full-width half-maximum angular resolutions of 5.6-36.9". The disc is well resolved in all bands, with the ring structure visible at 70 and 160 um. Radial profiles of the disc surface brightness are produced, and a disc radius of 11" (~ 85 AU) is determined. The disc is seen to have a smooth structure thoughout the entire wavelength range, suggesting that the disc is in a steady state, rather than being an ephemeral structure caused by the recent collision of two large planetesimals.

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