Time-series Spectroscopy of Pulsating sdB Stars: PG1605+072

Details Time-series Spectroscopy of Pulsating sdB Stars: PG1605+072 Time-series Spectroscopy of Pulsating sdB Stars: PG1605+072

2000-05-25

arxiv.org/abs/astro-ph/0005506v1

Astronomy and Astrophysics

Astrophysics

16 pages, 3 figures, ApJ Letters, accepted

Scientific paper

10.1086/312757

We report the detection of velocity variations in the pulsating sdB star, PG 1605+072. Oscillations are detected at the same frequencies found from photometry and have amplitudes of up to 14 km/s for H$\beta$. The strongest oscillation found in previous photometric observations is not evident in our spectroscopy or photometry, and may be absent due to beating of closely spaced modes. Phase differences between spectroscopy and B magnitude photometry imply that maximum brightness occurs not long after maximum radius. We have also found evidence of variation in the observed amplitudes of five Balmer lines, with a decrease in amplitude of the strongest mode blueward from H$\beta$. This effect is not expected and a longer time-series will be needed to clarify it.

Affiliated with

Also associated with

No associations

Rating

Time-series Spectroscopy of Pulsating sdB Stars: PG1605+072 does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Time-series Spectroscopy of Pulsating sdB Stars: PG1605+072, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Time-series Spectroscopy of Pulsating sdB Stars: PG1605+072 will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-200407