Radial velocity variations of the pulsating subdwarf B star PG 1605+072
arXiv:astro-ph/0111225 · doi:10.1046/j.1365-8711.2002.04995.x
Abstract
We present an analysis of high-speed spectroscopy of the pulsating subdwarf B star PG 1605+072. Periodic radial motions are detected at frequencies similar to those reported for photometric variations in the star, with amplitudes of up to 6 km/s. Differences between relative strengths for given frequency peaks for our velocity data and previously measured photometry are probably a result of shifting of power between modes over time. Small differences in the detected frequencies may also indicate mode-shifting. We report the detection of line-shape variations using the moments of the cross correlation function profiles. It may be possible to use the moments to identify the star's pulsation modes.
5 pages, 6 figures
References in corpus (2)
Cited by in corpus (11)
- Mode identification for Balloon 090100001 using combined multicolour photometry and spectroscopy
- Time-series Spectroscopy of Pulsating sdB Stars II: Velocity Analysis of PG1605+072
- Time-series Spectroscopy of Pulsating sdB stars III: Line Indices of PG1605+072
- Simultaneous time-series spectroscopy and multi-band photometry of the sdBV PG 1605+072
- The MultiSite Spectroscopic Telescope campaign: 2m spectroscopy of the V361 Hya variable PG1605+072
- First Attempt at Spectroscopic Detection of Gravity Modes in a Long-Period Pulsating Subdwarf B Star -- PG 1627+017
- Time-resolved FUSE Photometric and Spectroscopic Observations: PG1219+534, PG1605+072, and PG1613+426
- The MSST Campaign: II.Effective temperature and gravity variations in the multi-periodic pulsating subdwarf B star PG1605+072
- Time-series Spectroscopy and Photometry of the Pulsating Subdwarf B Star PG 1219+534 (KY UMa)
- MSST observations of the pulsating sdB star PG1605+072
- Amplitude variation and multiplet structures: Is PG1605+072 a slow rotator?