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Optical and near-IR photometric study of the open cluster NGC 637 and NGC 957
R. K. S. Yadav, Brijesh Kumar, A. Subramaniam +2
We present UBVRI CCD photometry in the region of the open clusters NGC 637 and NGC 957. The radii are found to be 4.2 arcmin and 4.3 arcmin. Their reddenings E(B-V) are 0.64+/-0.05…
Pre-main sequence stars, emission stars and recent star formation in the Cygnus Region
Bhavya B, Blesson Mathew, Annapurni Subramaniam
The recent star formation history in the Cygnus region is studied using 5 clusters (IC 4996, NGC 6910, Berkeley 87, Biurakan 2 and Berkeley 86). The optical data from the literatur…
Be phenomenon in open clusters: Results from a survey of emission-line stars in young open clusters
Blesson Mathew, Annapurni Subramaniam, Bhuwan Chandra Bhatt
Emission-line stars in young open clusters are identified to study their properties, as a function of age, spectral type and their evolutionary state. 207 open star clusters were o…
NGC 7419: A young open cluster with a number of very young intermediate mass pre-MS stars
Annapurni Subramaniam, Blesson Mathew, Bhuwan Chandra Bhatt +1
We present a photometric and spectroscopic study of the young open cluster NGC 7419, which is know to host a large number of classical Be stars for reasons not well understood. Bas…