Hot Jupiters in Binary Star Systems
| Autor: | Norman Murray, J. Michael Ramsahai, Yanqin Wu |
|---|---|
| Rok vydání: | 2007 |
| Předmět: |
Physics
010308 nuclear & particles physics Astrophysics (astro-ph) FOS: Physical sciences Astronomy and Astrophysics Astrophysics 01 natural sciences Kozai mechanism Radial velocity Orbit 13. Climate action Space and Planetary Science Planet 0103 physical sciences Hot Jupiter Binary star Astrophysics::Earth and Planetary Astrophysics Tidal acceleration 010303 astronomy & astrophysics Jupiter mass |
| Zdroj: | The Astrophysical Journal. 670:820-825 |
| ISSN: | 1538-4357 0004-637X |
| Popis: | Radial velocity surveys find Jupiter mass planets with semi-major axes a less than 0.1 AU around ~1% of solar-type stars; counting planets with $a$ as large as 5 AU, the fraction of stars having planets reaches ~ 10% {Marcy,Butler}. An examination of the distribution of semi-major axes shows that there is a clear excess of planets with orbital periods around 3 or 4 days, corresponding to a~0.03$ AU, with a sharp cutoff at shorter periods (see Figure 1). It is believed that Jupiter mass planets form at large distances from their parent stars; some fraction then migrate in to produce the short period objects. We argue that a significant fraction of the `hot Jupiters' (a accepted to ApJ main journal, added one figure and expanded discussions |
| Databáze: | OpenAIRE |
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