The multiperiodic δ Scuti star 4 Canum Venaticorum:: 1997 APT photometry

被引：24

作者：

Breger, M ^{[1
]}

Hiesberger, F ^{[1
]}

机构：

[1] Univ Vienna, Inst Astron, A-1180 Vienna, Austria

来源：

ASTRONOMY & ASTROPHYSICS SUPPLEMENT SERIES | 1999年 / 135卷 / 03期

关键词：

stars : delta Sct; stars : oscillations; stars : individual : 4 CVn; techniques : photometric;

D O I：

10.1051/aas:1999187

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

204 hours of high-quality measurements of 4 CVn during 32 nights were obtained with the 0.75 m Automatic Photolectric Telescope (APT). The two comparison stars measured agreed to +/-2.7 mmag per single measurement in Stromgren y and +/-3.0 mmag in v. It is shown that APT's can be used successfully for the study of stellar nonradial pulsation at the millimag level. An analysis of the multiperiodicity of 4 CVn revealed the presence of 19 simultaneously excited pulsation frequencies. This presents a considerable increase from the 7 frequencies found during a previous campaign of the Delta Scuti Network. The previously known frequencies were confirmed with amplitude variability on a time scale of years.

引用

页码：547 / 553

页数：7