On the Nature of Bright Blue Stragglers in the Centre of m3 and NGC6397 - Analysis of UBV Observations

Details On the Nature of Bright Blue Stragglers in the Centre of m3 and NGC6397 - Analysis of UBV Observations On the Nature of Bright Blue Stragglers in the Centre of m3 and NGC6397 - Analysis of UBV Observations

Jul 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993a%26a...274..214l&link_type=abstract

Astronomy and Astrophysics, Vol. 274, NO. 1/JUL(I), P. 214, 1993

Astronomy and Astrophysics

Astrophysics

16

Globular Clusters: Individual: M 3, Ngc 6397, Stars: Population Ii-Stars: Evolution, Techniques: Photometric

Scientific paper

We present UBV CCD observations of the central region of the globular cluster M 3 obtained with the 2 m Bernard Lyot telescope of Pic-du-Midi observatory under V subarcsecond seeing conditions. The V vs. B-V diagram reveals at least 8 bright blue stragglers (BSs) to exist in the 4O"x12O" investigated field. The UBV M 3 data are analysed together with those obtained for NGC 6397 (Lauzeral et al. 1992) in order to check the origin of the bright central BSs. Using a suggestion from Bailyn (1992), we adopt sufficient conditions for a BS to have a collisional origin. Effects of stellar evolution are also taken into account. At least two of the central NGC 6397 BSs verify these sufficient conditions, and all may lie on a post turnover sequence. This strengthens the hypothesis that those stars result from collisions in the very dense core of NGC 6397. As to the more distant cluster M 3, two of the central BSs have photometric properties of the collisional ones, but errors on the magnitudes prevent any firm conclusion to be derived.

Affiliated with

Also associated with

No associations

Rating

On the Nature of Bright Blue Stragglers in the Centre of m3 and NGC6397 - Analysis of UBV Observations 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 On the Nature of Bright Blue Stragglers in the Centre of m3 and NGC6397 - Analysis of UBV Observations, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and On the Nature of Bright Blue Stragglers in the Centre of m3 and NGC6397 - Analysis of UBV Observations will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1066448