The stellar population of the star forming region G61.48+0.09

Details The stellar population of the star forming region G61.48+0.09 The stellar population of the star forming region G61.48+0.09

2009-04-21

arxiv.org/abs/0904.3202v1

Astronomy and Astrophysics

Astrophysics

Galaxy Astrophysics

20 pages, 10 figures. Accepted for publication in A&A

Scientific paper

- Context: We present the results of a near-infrared photometric and spectroscopic study of the star forming region G61.48+0.09. - Aims: The purpose of this study is to characterize the stellar content of the cluster and to determine its distance, extinction, age and mass. - Methods: The stellar population was studied by using color-magnitude diagrams to select twenty promising cluster members, for which follow up spectroscopy was done. The observed spectra allowed a spectral classification of the stars. - Results: Two stars have emission lines, twelve are G-type stars, and six are late-O or early-B stars. - Conclusions: The cluster's extinction varies from A_{K_S} = 0.9 to A_{K_S} = 2.6, (or A_{V}~8 to A_{V}~23). G61.48+0.09 is a star forming region located at 2.5+/-0.4 Kpc. The cluster is younger than 10 Myr and has a minimum stellar mass of 1500+/-500 Solar masses. However, the actual total mass of the cluster remains undetermined, as we cannot see its whole stellar content.

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