| Issue |
Astron. Astrophys. Suppl. Ser.
Volume 137, Number 3, June II 1999
|
|
|---|---|---|
| Page(s) | 445 - 449 | |
| DOI | https://doi.org/10.1051/aas:1999257 | |
| Published online | 15 June 1999 | |
The new period determination and mode identification of δ Scuti star HR 5437
Beijing Astronomical Observatory, Chinese Academy of Sciences, 100012 Beijing, China Internet: lzl@class1.bao.ac.cn
Send offprint request to: Liu Zong-Li
Received:
4
December
1998
Accepted:
12
March
1999
The δ Scuti variable star HR 5437 was observed with
the 85 cm telescope at the Xinglong Station of Beijing Astronomical
Observatory from 1997 to 1998. Period analyses were made for our data
set, the data set obtained by Li and Jiang in 1991 and the combined data set
(1991–1998). From the combined data set two frequencies were obtained:
11.3484 and 6.9840 cd-1. We calculated the evolution sequences of
a star with 1.0-2.0 solar mass and all pulsation modes of each evolution
phase. Among all the modes calculated from the 140th evolution phase of
a star with 1.90 solar mass we found two frequencies which are almost
the same as the two observed frequencies. So, we tend to suggest that
HR 5437 pulsates in two modes: a radial p mode with 
, 
and
another nonradial p modes with 
, 
.
Key words: stars: δ Scuti / stars: oscillations / stars: individual: HR 5437
© European Southern Observatory (ESO), 1999