The detection of multimodal oscillations on α Ursae Majoris

被引：64

作者：

Buzasi, D ^{[1
]}

Catanzarite, J

Laher, R

Conrow, T

Shupe, D

Gautier, TN

Kreidl, T

Everett, D

机构：

[1] Univ Calif Berkeley, Space Sci Lab, Berkeley, CA 94720 USA

[2] CALTECH, Ctr Infrared Proc & Anal, Pasadena, CA 91125 USA

[3] CALTECH, Jet Prop Lab, Pasadena, CA 91125 USA

[4] No Arizona Univ, Informat Technol Serv, Flagstaff, AZ 86011 USA

[5] No Arizona Univ, Dept Phys & Astron, Flagstaff, AZ 86011 USA

[6] NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA

来源：

ASTROPHYSICAL JOURNAL | 2000年 / 532卷 / 02期

关键词：

stars : individual (alpha Ursae Majoris); stars : oscillations;

D O I：

10.1086/312573

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We have used the star camera on the Wide-Field Infrared Explorer satellite to observe the K0 III star alpha UMa, and we report the apparent detection of 10 oscillation modes. The lowest frequency mode is at 1.82 mu Hz, and it appears to be the fundamental mode. The mean spacing between the mode frequencies is 2.94 mu Hz, which implies that all detected modes are radial. The mode frequencies are consistent with the physical parameters of a K0 III star, if we assume that only radial modes are excited. Mode amplitudes are 100-400 mu mag, which is consistent with the scaling relation of Kjeldsen & Bedding.

引用

页码：L133 / L136

页数：4

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