Search for HH Objects and Emission Stars in Star Formation Regions. III. PMS Stars in NGC 7129

Author： Magakian T. Yu.   Movsessian T. A.   Nikogossian E. H.  

Publisher： Springer Publishing Company

ISSN： 0571-7256

Source： Astrophysics, Vol.47, Iss.4, 2004-10, pp. : 519-529

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Abstract

Slitless spectroscopy is used to discover 22 emission stars in the central and northwest regions of the cluster located in the NGC 7129 nebula. 16 of them are found for the first time. This sample is essentially complete up to V ≤20.0. The emission stars are distributed nonuniformly over the field of the cluster and are concentrated toward its center. Photometry in the V, R, and I bands is conducted on more than a hundred stars in the cluster. This yields an average absorption coefficient AV=1.7±0.27 for this region. Based on their positions in color diagrams for the optical and near IR ranges, most of the emission stars can be regarded as T Tau objects.

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