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.
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收藏
页码：L5 / L8
页数：4
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