The search for an atmospheric signature of the transiting exoplanet HD 149026b

被引：3

作者：

Bozorgnia, Nassim ^{[1
]}

Fortney, Jonathan J.

McCarthy, Chris

Fischer, Debra A.

Marcy, Geoffrey W.

机构：

[1] San Francisco State Univ, Dept Phys & Astron, 1600 Holloway Ave, San Francisco, CA 94132 USA

[2] NASA, Ames Res Ctr, Space Sci & Astrobiol Div, Moffett Field, CA 94035 USA

[3] SETI Inst, Mountain View, CA 94043 USA

[4] Univ Calif Berkeley, Dept Astron, Berkeley, CA 94720 USA

来源：

PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF THE PACIFIC | 2006年 / 118卷 / 847期

关键词：

D O I：

10.1086/508237

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

HD 149026b is a short-period, Saturn-mass planet that transits a metal-rich star. The planet's radius, determined by photometry, is remarkably small compared to other known transiting planets, with a heavy-element core that apparently comprises similar to 70% of the total planet mass. Time-series spectra were obtained at Keck before and during transit in order to model the Rossiter-McLaughlin effect. Here we make use of these observations to carry out a differential comparison of spectra obtained in and out of transit to search for signatures of neutral atomic lithium and potassium from the planet atmosphere. No signal was detected at the 2% level; we therefore place upper limits on the column density of these atoms.

引用

页码：1252 / 1259

页数：8

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