Detection of Solar-like oscillations in the G7 giant star ξ Hya

被引：150

作者：

Frandsen, S

Carrier, F

Aerts, C

Stello, D

Maas, T

Burnet, M

Bruntt, H

Teixeira, TC

de Medeiros, JR

Bouchy, F

Kjeldsen, H

Pijpers, F

Christensen-Dalsgaard, J

机构：

[1] Aarhus Univ, Inst Fys & Astron, DK-8000 Aarhus C, Denmark

[2] Observ Geneva, CH-1290 Sauverny, Switzerland

[3] Katholieke Univ Leuven, Inst Sterrenkunde, B-3001 Louvain, Belgium

[4] Univ Porto, Ctr Astrofis, Oporto, Portugal

[5] Univ Fed Rio Grande Norte, Dept Fis, BR-59072970 Natal, RN, Brazil

[6] Danmarks Grundforskningsfond, Teoret Astrofys Ctr, Aarhus, Denmark

来源：

ASTRONOMY & ASTROPHYSICS | 2002年 / 394卷 / 01期

关键词：

asteroseismology; solar type oscillations; giant stars;

D O I：

10.1051/0004-6361:20021281

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We report the firm discovery of solar-like oscillations in a giant star. We monitored the star xi Hya (G7III) continuously during one month with the CORALIE spectrograph attached to the 1.2 m Swiss Euler telescope. The 433 high-precision radial-velocity measurements clearly reveal multiple oscillation frequencies in the range 50-130 muHz, corresponding to periods between 2.0 and 5.5 hours. The amplitudes of the strongest modes are slightly smaller than 2 m s(-1). Current model calculations are compatible with the detected modes.

引用

页码：L5 / L8

页数：4

共 20 条

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