EDP Sciences
Free Access
Volume 404, Number 1, June II 2003
Page(s) 217 - 222
Section Stellar clusters and associations
DOI https://doi.org/10.1051/0004-6361:20030485
Published online 26 May 2003

A&A 404, 217-222 (2003)
DOI: 10.1051/0004-6361:20030485

The embedded star clusters in the nebulae vdB-RN 92 and Gy 3-7 in Canis Majoris R1

J. B. Soares and E. Bica

Universidade Federal do Rio Grande do Sul, IF, CP 15051, Porto Alegre 91501-970, RS, Brazil
(Received 23 December 2002 / Accepted 25 March 2003)

We employed J, H and $ K_{\rm s}$ photometry from the 2MASS Point Source Catalogue to study the embedded star clusters in the nebulae vdB-RN 92 and Gy 3-7, which are located in the molecular cloud Canis Majoris R1. We employed colour-colour and colour-magnitudes diagrams together with theoretical pre-main sequence isochrones to derive their fundamental parameters. Ages are based on the fraction of stars with anomalous colours, supposedly of types Herbig AeBe and T Tauri. The vdB-RN 92 cluster has an age of 5-7 Myr and the Gy 3-7 cluster $\approx$2 Myr. The average reddening values are AV=4.4 and AV=6.3, respectively for vdB-RN 92 and Gy 3-7. The distance found for vdB-RN 92 was 1.5 kpc which is, within uncertainties, compatible with previous estimates for the complex. Gy 3-7 also appears to be related to the CMaR1 complex. We conclude that CMaR1 is a very active star-forming site, now with four star clusters in early evolutionary stages.

Key words: Galaxy: open clusters and associations: individual: Gy 3-7, vdB-RN 92

Offprint request: J. B. Soares, jules@if.ufrgs.br

SIMBAD Objects

© ESO 2003

Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.

Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.

Initial download of the metrics may take a while.