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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
Astrophysical journal/The Astrophysical journal, 02/2008, Letnik: 673, Številka: 2Journal Article
We report observations from the Spitzer Space Telescope regarding the frequency of 24 mu m excess emission toward Sun-like stars. Our unbiased sample is composed of 309 stars with masses 0.7-2.2 M unk and ages from <3 Myr to >3 Gyr that lack excess emission at wavelengths less than or equal to 8 mu m. We identify 30 stars that exhibit clear evidence of excess emission from the observed 24 mu m/8 mu m flux ratio. The implied 24 mu m 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 mu m 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.
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Leto | Faktor vpliva | Izdaja | Kategorija | Razvrstitev | ||||
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JCR | SNIP | JCR | SNIP | JCR | SNIP | JCR | SNIP |
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Vir: Osebne bibliografije
in: SICRIS
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