What are hot Jupiters made of?
نویسندگان
چکیده
منابع مشابه
Two Classes of Hot Jupiters
We identify two classes of transiting planet, based on their equilibrium temperatures and Safronov numbers. We examine various possible explanations for the dichotomy. It may reflect the influence of planet or planetesimal scattering in determining when planetary migration stops. Another possibility is that some planets lose more mass to evaporation than others. If this evaporation process pref...
متن کاملHot Jupiters: Lands of Plenty
In late August 2005, 80 researchers from more than 15 countries convened for a 4-day conference entitled “The Tenth Anniversary of 51 Peg b: Status and Prospects for Hot Jupiter Studies”. The meeting was held at l’Observatoire de Haute-Provence, the location of the 1.93-m telescope and ELODIE spectrograph used to discover the planetary companion to 51 Peg roughly 10 years ago. I summarize sever...
متن کاملAtmospheric escape from hot Jupiters
The extra-solar planet HD209458b has been found to have an extended atmosphere of escaping atomic hydrogen (Vidal-Madjar et al. 2003), suggesting that “hot Jupiters” closer to their parent stars could evaporate. Here we estimate the atmospheric escape (so called evaporation rate) from hot Jupiters and their corresponding life time against evaporation. The calculated evaporation rate of HD209458...
متن کاملWhat Are Grades Made Of?
T he term “grade inflation” covers a multitude of phenomena, some of which are even alleged to be sins. Continuing increases in average grades have been widely documented in many universities over the last several decades (for example, Sabot and Wakeman-Linn, 1991; Johnson, 2003). Conversely, cases of grade deflation are rare and short-lived, although in some settings, such as first-year law co...
متن کاملObliquity Tides on Hot Jupiters
Obliquity tides are a potentially important source of heat for extrasolar planets on close-in orbits. Although tidal dissipation will usually reduce the obliquity to zero, a nonzero obliquity can persist if the planet is in a Cassini state, a resonance between spin precession and orbital precession. Obliquity tides might be the cause of the anomalously large size of the transiting planet HD 209...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Astronomy and Geophysics
سال: 2002
ISSN: 1366-8781,1468-4004
DOI: 10.1046/j.1468-4004.2002.43421.x