Uses of linear polarization as a probe of extrasolar planet atmospheres

被引：0
|
作者：
Saar, SH [1 ]
Seager, S [1 ]
机构：
[1] Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA
来源：
SCIENTIFIC FRONTIERS IN RESEARCH ON EXTRASOLAR PLANETS | 2003年 / 294卷
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中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
We point out some advantages of making observations of extrasolar planets in linearly polarized (LP) light. Older cool stars have quite low levels (similar to 10(-4) to 10(-5)) of fractional LP, while extrasolar planets can have relatively high fractional LP (similar to 0.1). Observations in LP light can therefore significantly enhance contrast between the planet and its parent star. Data on LP as a function of planetary orbital phase can be used to diagnose the properties (e.g., composition, size, and shape) of the scatterers in the planetary atmosphere. We discuss the feasibility of LP observations of extrasolar planets.
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页码：529 / 534
页数：6
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