A 25 micron search for Vega-like disks around main-sequence stars with ISO

Free access article

Issue		A&A Volume 387, Number 1, May III 2002


Page(s)		285 - 293
Section		Formation and evolution of planetary systems
DOI		http://dx.doi.org/10.1051/0004-6361:20020366

A&A 387, 285-293 (2002)
DOI: 10.1051/0004-6361:20020366

A 25 micron search for Vega-like disks around main-sequence stars with ISO

R. J. Laureijs¹, M. Jourdain de Muizon^{2, 3}, K. Leech¹, R. Siebenmorgen⁴, C. Dominik⁵, H. J. Habing⁶, N. Trams⁷ and M. F. Kessler¹

¹ ISO Data Centre, ESA Astrophysics Division, Villafranca del Castillo, PO Box 50727, 28080 Madrid, Spain
² LAEFF-INTA, ESA VILSPA, PO Box 50727, 28080 Madrid, Spain
³ DESPA, Observatoire de Paris, 92190 Meudon, France
⁴ ESO, K. Schwarzschildstr. 2, 85748 Garching bei München, Germany
⁵ Astr. Inst. Anton Pannekoek, Univ. Amsterdam, Kruislaan 403, 1098 SJ, Amsterdam, The Netherlands
⁶ Leiden Observatory, PO Box 9513, 2300 RA Leiden, The Netherlands
⁷ Integral Science Operations, ESA ESTEC, Keplerlaan 1, 2201 AZ Noordwijk, The Netherlands

(Received 10 August 2001 / Accepted 8 March 2002 )

Abstract
We present an ISO 25 $\mu$ m photometric survey of a sample of 81 nearby main-sequence stars in order to determine the incidence of "warm" dust disks. All stars were detected by ISO. We used an empirical relation to estimate the photospheric flux of the stars at 25 $\mu$ m. We find 5 stars (6%) with excess above the photospheric flux which we attribute to a Vega-like disk. These stars show disk temperatures not warmer than 120 K. Our study indicates that warm disks are relatively rare. Not a single star in our sample older than 400 Myr has a warm disk. We find an upper limit of $M_{\rm disk}\,=~2\times 10^{-5}~M_{\oplus}$ for the mass of the disks which we did not detect.

Key words: stars: planetary systems -- stars: general -- infrared: stars

Offprint request: R. J. Laureijs, Rene.Laureijs@esa.int

SIMBAD Objects

What is OpenURL?

The OpenURL standard is a protocol for transmission of metadata describing the resource that you wish to access. An OpenURL link contains article metadata and directs it to the OpenURL server of your choice. The OpenURL server can provide access to the resource and also offer complementary services (specific search engine, export of references...). The OpenURL link can be generated by different means.

If your librarian has set up your subscription with an OpenURL resolver, OpenURL links appear automatically on the abstract pages.
You can define your own OpenURL resolver with your EDPS Account. In this case your choice will be given priority over that of your library.
You can use an add-on for your browser (Firefox or I.E.) to display OpenURL links on a page (see http://www.openly.com/openurlref/). You should disable this module if you wish to use the OpenURL server that you or your library have defined.