Evolution of "51 Pegasus b-like" planets

被引:314
作者
Guillot, T [1 ]
Showman, AP
机构
[1] Observ Cote Azur, Lab Cassini, CNRS, UMR 6529, F-06304 Nice 4, France
[2] Univ Arizona, Dept Planetary Sci, Tucson, AZ 85721 USA
[3] Univ Arizona, Lunar & Planetary Lab, Tucson, AZ 85721 USA
关键词
stars; individual; 51; Peg; HD; 209458; planets and satellites : general; stars : planetary systems;
D O I
10.1051/0004-6361:20011624
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
About one-quarter of the extrasolar giant planets discovered so far have orbital distances smaller than 0.1 AU. These "51 Peg b-like" planets can now be directly characterized, as shown by the planet transiting in front the star HD 209458. We review the processes that affect their evolution. We apply our work to the case of HD 209458b, whose radius has been recently measured. We argue that its radius can be reproduced only when the deep atmosphere is assumed to be unrealistically hot. When using more realistic atmospheric temperatures, an energy source appears to be missing in order to explain HD 209458b's large size. The most likely source of energy available is not in the planet's spin or orbit, but in the intense radiation received from the parent star. We show that the radius of HD 209458b can be reproduced if a small fraction (similar to 1%) of the stellar flux is transformed into kinetic energy in the planetary atmosphere and subsequently converted to thermal energy by dynamical processes at pressures of tens of bars.
引用
收藏
页码:156 / 165
页数:10
相关论文
共 37 条
[1]   LOW-TEMPERATURE ROSSELAND OPACITIES [J].
ALEXANDER, DR ;
FERGUSON, JW .
ASTROPHYSICAL JOURNAL, 1994, 437 (02) :879-891
[2]   Irradiated planets [J].
Barman, TAS ;
Hauschildt, PH ;
Allard, F .
ASTROPHYSICAL JOURNAL, 2001, 556 (02) :885-895
[3]   Models of the in situ formation of detected extrasolar giant planets [J].
Bodenheimer, P ;
Hubickyj, O ;
Lissauer, JJ .
ICARUS, 2000, 143 (01) :2-14
[4]   On the tidal inflation of short-period extrasolar planets [J].
Bodenheimer, P ;
Lin, DNC ;
Mardling, RA .
ASTROPHYSICAL JOURNAL, 2001, 548 (01) :466-472
[5]   Hubble Space Telescope time-series photometry of the transiting planet of HD 209458 [J].
Brown, TM ;
Charbonneau, D ;
Gilliland, RL ;
Noyes, RW ;
Burrows, A .
ASTROPHYSICAL JOURNAL, 2001, 552 (02) :699-709
[6]   A nongray theory of extrasolar giant planets and brown dwarfs [J].
Burrows, A ;
Marley, M ;
Hubbard, WB ;
Lunine, JI ;
Guillot, T ;
Saumon, D ;
Freedman, R ;
Sudarsky, D ;
Sharp, C .
ASTROPHYSICAL JOURNAL, 1997, 491 (02) :856-875
[7]   On the radii of close-in giant planets [J].
Burrows, A ;
Guillot, T ;
Hubbard, WB ;
Marley, MS ;
Saumon, D ;
Lunine, JI ;
Sudarsky, D .
ASTROPHYSICAL JOURNAL, 2000, 534 (01) :L97-L100
[8]   The near-infrared and optical spectra of methane dwarfs and brown dwarfs [J].
Burrows, A ;
Marley, MS ;
Sharp, CM .
ASTROPHYSICAL JOURNAL, 2000, 531 (01) :438-446
[9]   Detection of planetary transits across a sun-like star [J].
Charbonneau, D ;
Brown, TM ;
Latham, DW ;
Mayor, M .
ASTROPHYSICAL JOURNAL, 2000, 529 (01) :L45-L48
[10]   A radiative equilibrium model of 51 Peg b [J].
Goukenleuque, C ;
Bézard, B ;
Joguet, B ;
Lellouch, E ;
Freedman, R .
ICARUS, 2000, 143 (02) :308-323