Time resolved spectroscopy of Balloon 090100001

Details Time resolved spectroscopy of Balloon 090100001 Time resolved spectroscopy of Balloon 090100001

Jun 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007coast.150..265o&link_type=abstract

Communications in Astroseismology, Vol. 150, p.265

Astronomy and Astrophysics

Astronomy

2

Scientific paper

We obtained 2552 good low-resolution spectra of the bright sdBV star Balloon 090100001 with the Nordic Optical Telescope in August/September 2004. Results of the frequency analysis of this dataset have already been published (Telting & Østensen 2006; TØ 06). Eight independent frequencies were recovered in radial velocity and equivalent width, all in agreement with established photometric pulsation frequencies (Baran et al. 2006). The radial velocity amplitude of the main mode was found to be 18.9 km/s which is the largest radial-velocity amplitude found in a pulsating sdB star. Here we report our preliminary results from phase folding and fitting the spectroscopic data to synthetic model grids.

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