Photometric study of the variable star population in the globular cluster NGC 6397

Details Photometric study of the variable star population in the globular cluster NGC 6397 Photometric study of the variable star population in the globular cluster NGC 6397

2005-09-14

arxiv.org/abs/astro-ph/0509372v1

Mon.Not.Roy.Astron.Soc.365:548-554,2006

Astronomy and Astrophysics

Astrophysics

8 pages, 9 figures, submitted to MNRAS on 21 April 2005

Scientific paper

10.1111/j.1365-2966.2005.09734.x

We present the results of a photometric survey for variable stars in the central region of the nearby globular cluster NGC 6397.Time series photometry was obtained for 30 variable objects. The sample includes 12 new objects, of which 6 show periodic lightcurves and 2 are eclipsing binaries of unknown period. Six variables possess certain and three possess likely X-ray counterparts detected with the Chandra observatory. Among them four are cataclysmic variables and one is a foreground eclipsing binary. The cataclysmic variable CV2 exhibited a likely dwarf nova type outburst in May 2003. The cataclysmic variable CV3 was observed at 18.522. We have found that thelight curve of the optical companion to the millisecond pulsar PSRJ1740-5340 exhibits noticeable changes of its amplitude on a time scale of a few months. A shallow eclipse with Delta_V=0.03 mag was detected in one of the cluster turnoff stars suggesting the presence of a large planet or brown dwarf in orbit.

Affiliated with

Also associated with

No associations

Rating

Photometric study of the variable star population in the globular cluster NGC 6397 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 Photometric study of the variable star population in the globular cluster NGC 6397, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Photometric study of the variable star population in the globular cluster NGC 6397 will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-680829