DETERMINATION OF THE INCLINATION OF THE MULTI-PLANET HOSTING STAR HR 8799 USING ASTEROSEISMOLOGY

被引：36

作者：

Wright, D. J. ^{[1
]}

Chene, A. -N. ^{[2
,3
,4
]}

De Cat, P. ^{[1
]}

Marois, C. ^{[5
]}

Mathias, P. ^{[6
]}

Macintosh, B. ^{[7
]}

Isaacs, J. ^{[7
,8
]}

Lehmann, H. ^{[9
]}

Hartmann, M. ^{[9
]}

机构：

[1] Koninklijke Sterrenwacht Belgie, B-1180 Brussels, Belgium

[2] HIA NRC Canada, Canadian Gemini Off, Victoria, BC V9E 2E7, Canada

[3] Univ Concepcion, Dept Astron, Concepcion, Chile

[4] Univ Valparaiso, Fac Ciencia, Dept Fis & Astron, Valparaiso, Chile

[5] Herzberg Inst Astrophys, Natl Res Council Canada, Victoria, BC V9E 2E7, Canada

[6] Univ Toulouse, CNRS, Lab Astrophys Toulouse Tarbes, F-65000 Tarbes, France

[7] Lawrence Livermore Natl Lab, Livermore, CA 94550 USA

[8] Univ Wisconsin, Dept Phys, Madison, WI 53706 USA

[9] Thuringer Landessternwarte Tautenburg, D-07778 Tautenburg, Germany

来源：

ASTROPHYSICAL JOURNAL LETTERS | 2011年 / 728卷 / 01期

关键词：

planetary systems; stars: individual (HR 8799); stars: oscillations (including pulsations); GAMMA-DORADUS CANDIDATES; SYSTEM; CAMPAIGN; BINARY;

D O I：

10.1088/2041-8205/728/1/L20

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Direct imaging of the HR 8799 system was a major achievement in the study of exoplanets. HR 8799 is a gamma Doradus variable and asteroseismology can provide an independent constraint on the inclination. Using 650 high signal-to-noise, high-resolution, full visual wavelength spectroscopic observations obtained over two weeks at Observatoire de Haute Provence with the SOPHIE spectrograph, we find that the main frequency in the radial velocity data is 1.9875 day(-1). This frequency corresponds to the main frequency as found in previous photometric observations. Using the FAMIAS software to identify the pulsation modes, we find that this frequency is a prograde l = 1 sectoral mode and obtain the constraint that inclination i greater than or similar to 40 degrees.

引用

页数：4

共 9 条

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