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          Institute: MPI für Astronomie     Collection: Publikationen_mpia     Display Documents

ID: 421538.0, MPI für Astronomie / Publikationen_mpia
Evolution of mid-infrared excess around Sun-like stars: constraints on models of terrestrial planet formation
Authors:Meyer, M. R.; Carpenter, J. M.; Mamajek, E. E.; Hillenbrand, L. A.; Hollenbach, D.; Moro-Martin, A.; Kim, J. S.; Silverstone, M. D.; Najita, J.; Hines, D. C.; Pascucci, I.; Stauffer, J. R.; Bouwman, J.; Backman, D. E.
Date of Publication (YYYY-MM-DD):2008
Title of Journal:The Astrophysical Journal
Start Page:L181
End Page:L184
Review Status:Peer-review
Audience:Experts Only
Abstract / Description:We report observations from the Spitzer Space Telescope regarding the frequency of 24 mum excess emission toward Sun-like stars. Our unbiased sample is composed of 309 stars with masses 0.7-2.2 Msolar and ages from <3 Myr to >3 Gyr that lack excess emission at wavelengths <=8 mum. We identify 30 stars that exhibit clear evidence of excess emission from the observed 24 mum/8 mum flux ratio. The implied 24 mum excesses of these candidate debris disk systems range from 13% (the minimum detectable) to more than 100% compared to the expected photospheric emission. The frequency of systems with evidence for dust debris emitting at 24 mum ranges from 8.5%-19% at ages <300 Myr to <4% for older stars. The results suggest that many, perhaps most, Sun-like stars might form terrestrial planets.
Free Keywords:Stars: Circumstellar Matter; Infrared: Stars; Stars: Planetary Systems: Formation
External Publication Status:published
Document Type:Article
Communicated by:N. N.
Affiliations:MPI für Astronomie
Identifiers:URL:http://adsabs.harvard.edu/abs/2008ApJ...673L.181M [ID No:1]
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