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

被引：52

作者：

Laureijs, RJ

de Muizon, MJ

Leech, K

Siebenmorgen, R

Dominik, C

Habing, HJ

Trams, N

Kessler, MF

机构：

[1] ESTEC, ESA, Integral Sci Operat, NL-2201 AZ Noordwijk, Netherlands

[2] ISO Data Ctr, ESA Astrophys Div, Madrid 28080, Spain

[3] ESA VILSPA, INTA, LAEFF, Madrid 28080, Spain

[4] Observ Paris, DESPA, F-92190 Meudon, France

[5] ESO, D-85748 Garching, Germany

[6] Univ Amsterdam, Astron Inst Anton Pannekoek, NL-1098 SJ Amsterdam, Netherlands

[7] Leiden Observ, NL-2300 RA Leiden, Netherlands

来源：

ASTRONOMY & ASTROPHYSICS | 2002年 / 387卷 / 01期

关键词：

stars : planetary systems; stars : general; infrared : stars;

D O I：

10.1051/0004-6361:20020366

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We present an ISO 25 mum 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 mum. 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-disk = 2 x 10(5) M+ for the mass of the disks which we did not detect.

引用

页码：285 / 293

页数：9

共 24 条

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