Radial velocity variations of the pulsating subdwarf B star PG 1605+072
Astrophysics
2009-11-07 v1
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.
Keywords
Cite
@article{arxiv.astro-ph/0111225,
title = {Radial velocity variations of the pulsating subdwarf B star PG 1605+072},
author = {Vincent M. Woolf and C. Simon Jeffery and Donald L. Pollacco},
journal= {arXiv preprint arXiv:astro-ph/0111225},
year = {2009}
}
Comments
5 pages, 6 figures