UBVRI CCD photometry of the two Southern galactic star clusters Berkeley 79 and Trumpler 11

Ram Sagar, ; Cannon, R. D. (1994) UBVRI CCD photometry of the two Southern galactic star clusters Berkeley 79 and Trumpler 11 Bulletin of the Astronomical Society of India, 22 (4). pp. 381-401. ISSN 0304-9523

[img]
Preview
PDF - Publisher Version
1MB

Official URL: http://www.ncra.tifr.res.in/~basi/

Abstract

CCD observations in U, B, V, R and I passbands have been made down to V = 18.5 mag for the southern galactic star clusters Berkeley 79 and Trumpler 11. The sample consists of 60 and 358 stars respectively. Berkeley 79 seems to have non-uniform extinction over the observed region with a median value of E(B - V) = 1.19 (±0.05) mag while a uniform reddening with E(B - V) = 0.21 (±O.02) mag appears to be present over the face of Trumpler 11. The distances to the clusters Berkeley 79 and Trumpler 11 have been estimated as 2.3 ± 0.2 kpc and 3.1 ± 0.3 kpc respectively. Based on the isochrones fitting to the bright stars, an age of ~65 Myr has been assigned to Berkeley 79 while age of Trumpler 11 has been estimated to be in the range of 100 to 250 Myr.

Item Type:Article
Source:Copyright of this article belongs to Astronomical Society of India.
Keywords:Photometry; Star Clusters; Stellar Evolution
ID Code:67791
Deposited On:31 Oct 2011 13:33
Last Modified:18 May 2016 14:45

Repository Staff Only: item control page