Astronomy and Astrophysics – Astronomy
Scientific paper
Jul 1985
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985aj.....90.1247t&link_type=abstract
Astronomical Journal (ISSN 0004-6256), vol. 90, July 1985, p. 1247-1259.
Astronomy and Astrophysics
Astronomy
36
Astronomical Photometry, Blue Stars, Star Clusters, Stellar Color, Distance, Interstellar Extinction, Open Clusters, Red Giant Stars, Ubv Spectra
Scientific paper
uvby photometry of 28 blue stragglers in the open cluster NGC 7789 is presented and analyzed. A rediscussion of the fundamental cluster parameters is presented. Comparison of these results with those from the blue stragglers indicates that standard photometric calibrations do apply to the stragglers. It is found that the extended halo of blue stragglers around NGC 7789 is composed predominantly of field stars, and that the radial distribution of the stragglers is similar to that of the red giants, implying that the progenitors of both classes of stars have the same mass, i.e., single stars near the cluster turnoff. When combined with weak photometric evidence for a lower bound to the luminosity distribution of the stragglers in the C-M diagram, it is concluded that the best current model for these enigmatic stars is that of a single star which has mixed internally, as delineated in the work of Saio and Wheeler (1980). Possibilities for future research are outlined.
Twarog Bruce A.
Tyson Neil
No associations
LandOfFree
UVBY photometry of blue stragglers in NGC 7789 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 UVBY photometry of blue stragglers in NGC 7789, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and UVBY photometry of blue stragglers in NGC 7789 will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1230651