An application of CCD UVBY photometry to the globular cluster NGC 6397

Details An application of CCD UVBY photometry to the globular cluster NGC 6397 An application of CCD UVBY photometry to the globular cluster NGC 6397

Jun 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987aj.....93.1454a&link_type=abstract

Astronomical Journal (ISSN 0004-6256), vol. 93, June 1987, p. 1454-1463.

Astronomy and Astrophysics

Astronomy

21

Astronomical Photometry, Charge Coupled Devices, Globular Clusters, Metallicity, Binary Stars, Dwarf Stars, Main Sequence Stars, Stellar Evolution

Scientific paper

The CTIO 4 m PFCCD has been used with Strömgren uvby filters to study the turnoff of the globular cluster NGC 6397. A well-defined C-M diagram to V ≡ 18 has been achieved with this relatively new application of uvby photometry. A previously noted correlation between δm1 and δc1 for turnoff stars appears to be confirmed by observations of NGC 6397. Self-consistent solution sets of reddening, metal abundance, and age are possible. An age of 16.6±0.7×109yr is indicated. The generally low m1 values for the main-sequence members of the globular cluster permit an exclusion of field-star nonmembers, exclusions independently verified by anomalous δm1, δc1 values. The C-M diagram for the upper main sequence of NGC 6397 following such exclusion shows evidence for several photometric binary candidates.

Affiliated with

Also associated with

No associations

Rating

An application of CCD UVBY photometry to 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 An application of CCD UVBY photometry to the globular cluster NGC 6397, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and An application of CCD UVBY photometry to the globular cluster NGC 6397 will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1813715