Debris Disks around Solar-Type Stars: Observations of the Pleiades with Spitzer Space Telescope
| Autor: | George Rieke, J. M. Sierchio, N. Gorlova, Kate Y. L. Su, John Stauffer, Peter Plavchan |
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| Rok vydání: | 2010 |
| Předmět: |
Physics
Earth and Planetary Astrophysics (astro-ph.EP) Planetesimal Stellar rotation Flux FOS: Physical sciences Astronomy and Astrophysics Astrophysics Astrophysics::Cosmology and Extragalactic Astrophysics Debris Stars Spitzer Space Telescope Space and Planetary Science Astrophysics::Solar and Stellar Astrophysics Astrophysics::Earth and Planetary Astrophysics Pleiades Astrophysics::Galaxy Astrophysics Open cluster Astrophysics - Earth and Planetary Astrophysics |
| DOI: | 10.48550/arxiv.1003.0351 |
| Popis: | We present Spitzer MIPS observations at 24 um of 37 solar-type stars in the Pleiades and combine them with previous observations to obtain a sample of 71 stars. We report that 23 stars, or 32 +/- 6.8%, have excesses at 24 um at least 10% above their photospheric emission. We compare our results with studies of debris disks in other open clusters and with a study of A stars to show that debris disks around solar-type stars at 115 Myr occur at nearly the same rate as around A-type stars. We analyze the effects of binarity and X-ray activity on the excess flux. Stars with warm excesses tend not to be in equal-mass binary systems, possibly due to clearing of planetesimals by binary companions in similar orbits. We find that the apparent anti-correlations in the incidence of excess and both the rate of stellar rotation and also the level of activity as judged by X-ray emission are statistically weak. Comment: 34 pages; accepted for publication in ApJ; new version included corrections of typos, etc to match published version |
| Databáze: | OpenAIRE |
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