VLT transit and occultation photometry for the bloated planet CoRoT-1b

被引：67
作者：
Gillon, M. [1 ,2 ]
Demory, B. -O. [2 ]
Triaud, A. H. M. J. [2 ]
Barman, T. [3 ]
Hebb, L. [4 ]
Montalban, J. [1 ]
Maxted, P. F. L. [5 ]
Queloz, D. [2 ]
Deleuil, M. [6 ]
Magain, P. [1 ]
机构：
[1] Univ Liege, Inst Astrophys & Geophys, Liege 1, Belgium
[2] Univ Geneva, Observ Geneve, CH-1290 Sauverny, Switzerland
[3] Lowell Observ, Flagstaff, AZ 86001 USA
[4] Univ St Andrews, Sch Phys & Astron, Haugh KY16 9SS, Fife, Scotland
[5] Keele Univ, Astrophys Grp, Keele ST5 5BG, Staffs, England
[6] Astrophys Lab, UMR 6110, F-13388 Marseille, France
来源：
ASTRONOMY & ASTROPHYSICS | 2009年 / 506卷 / 01期
关键词：
binaries: eclipsing; planetary systems; stars: individual: CoRoT-1; infrared: stars; techniques: photometric; techniques: radial velocities; STELLAR ATMOSPHERE MODELS; LIGHT-CURVE PROJECT; LIMB-DARKENING LAW; SECONDARY ECLIPSE; THERMAL EMISSION; INFRARED OBSERVATIONS; HOT JUPITERS; MASS; SPECTROSCOPY; EVOLUTION;
D O I：
10.1051/0004-6361/200912231
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
We present VLT eclipse photometry for the giant planet CoRoT-1b. We observed a transit in the R-band filter and an occultation in a narrow filter centered on 2.09 mu m. Our analysis of this new photometry and published radial velocities, in combination with stellar-evolutionary modeling, leads to a planetary mass and radius of 1.07(-0.18)(+0.13) M-Jup and 1.45(-0.13)(+0.07) R-Jup, confirming the very low density previously deduced from CoRoT photometry. The large occultation depth that we measure at 2.09 mu m (0.278(-0.066)(+0.043)%) is consistent with thermal emission and is better reproduced by an atmospheric model with no redistribution of the absorbed stellar flux to the night side of the planet.
引用
收藏
页码：359 / 367
页数：9
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