The slowly pulsating sdB star EC 21324−1346
نویسندگان
چکیده
منابع مشابه
53 Persei : a slowly pulsating B star ?
A new investigation of the behaviour of the star 53 Per was performed. New photometric observations allow to confirm twodominant periods p1=2.16 d, p2= 1.67 d.A third one p3= 3.64 d is detected. These long period variations are present in our radial velocities data and in old equivalent width data. The amplitude of the p1 = 2.16 d period increases from 1977 to 1991, while the amplitude of the 1...
متن کاملPG 1618 + 563 B : A new bright pulsating sdB star ?
The results of two runs of time-series photometry made at the Nordic Optical Telescope clearly show that the sdB star PG 1618+563B is a new member of the EC 14026 class of sdB pulsators. Its power spectrum shows a doublet of frequencies at about 6.95 and 7.18 mHz (P ∼ 144 and 139 s respectively), which produce a modulation effect in the light curve with a beat period of about 1.2 hours. The amp...
متن کاملMode Identification of the Slowly Pulsating F 0 V Star
We have investigated the F0V star V398Aurigae (= 9 Aur) under the assumption that it is undergoing non-radial gravity mode oscillations and that the two principal periods given by Krisciunas et al. (1995) are correct. We find that the two periods are manifestations of an l = 3, |m| = 1 spheroidal mode and its toroidal corrections due to the rotation of the star. As far as we know, this is the f...
متن کاملTowards Asteroseismology of the Non-radial Pulsating Sdb Star Pg 1605+072
The recently discovered new class of sdB pulsators (sdBV) offers a powerful possibility for the investigation of their interior and thus their evolutionary history. The first step towards applying asteroseismologic tools is the identification of pulsation modes. The best target for such an investigation is PG 1605+072 because of its outstanding properties among the sdBVs: it is the brightest ob...
متن کاملTime-resolved Spectroscopy and Spectrophotometry of the Pulsating Sdb Star Pg 1605+072
We present the latest results from our analysis of time resolved spectroscopy of PG 1605+072, a high amplitude pulsating sdB star. The star is believed to have evolved off the extreme horizontal branch, and it is uncertain whether it pulsates in por g-modes. Previous studies of PG 1605+072 have found amplitude variation and/or very closely spaced frequencies. We compare our velocity measurement...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Monthly Notices of the Royal Astronomical Society
سال: 2007
ISSN: 0035-8711,1365-2966
DOI: 10.1111/j.1365-2966.2007.11382.x