Time-series Spectroscopy of Pulsating sdB stars III: Line Indices of PG1605+072
arXiv:astro-ph/0212220 · doi:10.1046/j.1365-8711.2003.06343.x
Abstract
We present the detection and analysis of line index variations in the pulsating sdB star PG 1605+072. We have found a strong dependence of line index amplitude on Balmer line order, with high-order Balmer line amplitudes up to 10 times larger than H-beta. Using a simple model, we have found that the line index may not only be dependent on temperature, as is usually assumed for oscillating stars, but also on surface gravity. This information will provide another set of observables that can be used for mode identification of sdBs.
8 pages, 9 figures, to appear in MNRAS. A high resolution version of Figure 3 can be found at http://www.sternwarte.uni-erlangen.de/~ai25/MC852-fig3.eps
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Cited by in corpus (8)
- Mode identification for Balloon 090100001 using combined multicolour photometry and spectroscopy
- 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
- Asteroseismology of the G8 subgiant beta Aquilae with SONG-Tenerife, SONG-Australia and TESS