Astronomy and Astrophysics – Astronomy
Scientific paper
Feb 2003
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003aj....125..801h&link_type=abstract
The Astronomical Journal, Volume 125, Issue 2, pp. 801-809.
Astronomy and Astrophysics
Astronomy
2
Stars: Color-Magnitude Diagrams, Globular Clusters: Individual (Ngc 6235)- Stars: Abundances, Stars: Horizontal-Branch
Scientific paper
We present the first detailed CCD photometric study of the Galactic globular cluster NGC 6235. Our BV color-magnitude diagram extends from above the tip of the first-ascent red giant branch (RGB) to 3 mag below the horizontal branch (HB). Based on an examination of the predominantly blue HB, we conclude that there is significant differential reddening in the direction of NGC 6235. We correct the photometry for this effect. By comparing the mean location of the blue HB stars in NGC 6235 with those of other clusters of similar metallicity, we infer a mean RR Lyrae magnitude of V(RR)=16.87+/-0.10. The shape and location of the RGB are used to establish a metal abundance of [Fe/H]=-1.18+/-0.09 on the Zinn & West scale, which translates to [Fe/H]=-0.99+/-0.07 by using the Carretta & Gratton scale. The mean reddening of NGC 6235, estimated using the metal abundance along with the apparent color of the RGB, is E(B-V)=0.24+/-0.03. Lastly, we determine the distance of NGC 6235 to be in the range 15.47<=(m-M)0<=15.57, depending on the value we adopt for the absolute magnitude of the RR Lyrae stars.
Djagalov Rossen
Gokas Tara
Howland Robert
Martins Donald H.
Sarajedini Ata
No associations
LandOfFree
CCD Photometry of the Galactic Globular Cluster NGC 6235 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 CCD Photometry of the Galactic Globular Cluster NGC 6235, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and CCD Photometry of the Galactic Globular Cluster NGC 6235 will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-919665