Astron. Astrophys. 315, L233-L236 (1996)
First results from a photometric infrared survey for Vega-like disksaround nearby main-sequence stars*
H.J. Habing1, P. Bouchet2, C. Dominik1, Th. Encrenaz3, A. Heske4, M. Jourdain de Muizon3,5, M.F. Kessler4, R. Laureijs4, K. Leech4, L. Metcalfe4, A. Salama4, R. Siebenmorgen4, N. Trams4, C. Waelkens6, and L.B.F.M. Waters7,8
1 Sterrewacht, Leiden, P.O. Box 9513, 2300 RA Leiden,
Received 30 July 1996 / Accepted 15 August 1996
Abstract. We have undertaken a survey for Vega-like disks around nearby main-sequence stars by making photometric measurements with ISOPHOT at four wavelengths between 25 and 180 m. Our goal is to establish how common Vega-like disks are, and how their presence depends on the fundamental properties of main-sequence stars (mass, age, rotation etc.). Here we present first results that concern Vega itself and g Lup. We confirm the results obtained by IRAS and give new fluxes at 135 and 180 m. We also present a first table of measurements on a larger sample. Vega-like disks are common, but not a general feature of all main-sequence stars with masses above 0.9 .
Key words: stars: planetary systems - stars: general - stars: individual: Vega, g Lup - infrared: stars
* Based on observations with ISO, an ESA project with instruments funded by ESA Member States (especially the PI countries: France, Germany, The Netherlands and the United Kingdom) and with the participation of ISAS and NASA.
Last change: December 16, 1996