PG 1613+426:: A new sdB pulsator

被引：10

作者：

Bonanno, A

Catalano, S

Frasca, A

Mignemi, G

Paternò, L

机构：

[1] Osserv Astrofis Catania, INAF, I-95123 Catania, Italy

[2] Univ Catania, Dipartimento Fis & Astron, Sez Astrofis, I-95123 Catania, Italy

来源：

ASTRONOMY & ASTROPHYSICS | 2003年 / 398卷 / 01期

关键词：

stars : subdwarfs; stars : oscillations; stars : individual : PG 1613+426;

D O I：

10.1051/0004-6361:20021664

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We report the detection of short period oscillations in the hot subdwarf B (sdB) star PG 1613+426 from time-series photometry carried out with the 91-cm Cassegrain telescope of the Catania Astrophysical Observatory. This star, which is brighter than the average of the presently known sdB pulsators, with B = 14.14 mag, has T-eff = 34 400 K and log g = 5.97, its position is near the hot end of the sdB instability strip, and it is a pulsator with a well observed peak in the power spectrum at 144.18 +/- 0.06 s. This star seems to be well suited for high precision measurements, which could detect a possible multi-mode pulsation behaviour.

引用

页码：283 / 285

页数：3

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