A Spitzer study of dusty disks in the Scorpius-Centaurus OB Association
Jan, 2005
12 pages
Published in:
- Astrophys.J. 623 (2005) 493-501
e-Print:
- astro-ph/0501103 [astro-ph]
DOI:
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Abstract: (arXiv)
We have obtained Spitzer Space Telescope MIPS observations of 40 F- and G-type common proper motion members of the Scorpius-Centaurus OB Association with ages between 5 and 20 Myr at 24 micron and 70 micron. We report the detection of fourteen objects which possess 24 micron fluxes >30% larger than their predicted photospheres, tentatively corresponding to a disk fraction of >35%, including seven objects which also possess 70 micron excesses >100 times larger than their predicted photospheres. The 24 micron plus 70 micron excess sources possess high fractional infrared luminosities, LIR/L* = 7.0e-4 - 3.0e-3: either they possess optically thin, dusty beta Pictoris-like disks or compact, opaque HD 98800-like disks.- circumstellar matter
- open clusters and associations: individual (Sco-Cen Association)
- planetary systems: formation
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