Transit light curve and inner structure of close-in planets

被引：26

作者：

Correia, Alexandre C. M. ^{[1
,2
]}

机构：

[1] Univ Aveiro, Dept Fis, I3N, P-3810193 Aveiro, Portugal

[2] UPMC, Observ Paris, ASD, IMCCE CNRS UMR8028, F-75014 Paris, France

来源：

ASTRONOMY & ASTROPHYSICS | 2014年 / 570卷

关键词：

planetary systems; techniques: photometric; planets and satellites: interiors; GIANT PLANETS; EXOPLANETS; OBLATENESS; PARAMETERS; SYSTEMS; MASS; EQUILIBRIUM; SATELLITES; ROTATION; DENSITY;

D O I：

10.1051/0004-6361/201424733

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Planets orbiting very close to their host stars have been found, some of them on the verge of tidal disruption. The ellipsoidal shape of these planets can significantly differ from a sphere, which modifies the transit light curves. Here we present an easy method for taking the effect of the tidal bulge into account in the transit photometric observations. We show that the differences in the light curve are greater than previously thought. When detectable, these differences provide an estimation of the fluid Love number, which is invaluable information on the internal structure of close-in planets. We also derive a simple analytical expression to correct the bulk density of these bodies, that can be 20% smaller than current estimates obtained assuming a spherical radius.

引用

页数：6

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