Release 11.12 ("Hergest Ridge")
Release 11.12 ("Hergest Ridge")
| Article ID: gc447 | |
| Author | Buonanno, R.; Corsi, C. E.; Ferraro, I.; Fusi Pecci, F. |
| Title | CCD photometry in globular clusters. I - NGC 7492 |
| Journal | Astronomy and Astrophysics Supplement Series, vol. 67, no. 2, p. 327-340 |
| Year of publication | 1987 (on gclusters from 2014-02-17 16:41:14 ) |
| Abstract | CCD photometry in B, V colors of the globular cluster NGC 7492 is presented for complete samples down to the main sequence. The color magnitude diagram (CMD) allows a detailed discussion of the cluster properties. The main conclusions are: (1) CMD metal abundance indicators lead to [Fe/H] = -1.51±0.2. (2) A primordial helium abundance of Y = 0.23±0.07 is derived. (3) Different methods used to determine the age of the cluster converge to a value of 15.6±2.0 Gyr adopting [O/Fe] = 0.0, E(B-V) = 0.01, (m-M)v = 17.15±0.15. (4) The horizontal branch is blue and without any blue tail. |
| CM diagram |  |
| Tags | NGC 7492 |
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