Browsing by Subject "stars: emission-line"

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Be phenomenon in open clusters: Results from a survey of emission-line stars in young open clusters

Mathew, B; Subramaniam, A; Bhatt, B. C (Institute de Astronomia, 2010-02)

Emission-line stars in young open clusters are identified to study their properties, as a function of age, spectral type and evolutionary state. 207 open star clusters were observed using slitless spectroscopy method and ...
Optical spectroscopy of Galactic field classical Be stars

Banerjee, G; Mathew, B; Paul, K. T; Subramaniam, A; Bhattacharyya, S; Anusha, R (Oxford University Press on behalf of the Royal Astronomical Society, 2021-01)

In this study, we analyse the emission lines of different species present in 118 Galactic field classical Be stars in the wavelength range of 3800–9000 Å. We re-estimated the extinction parameter (AV) for our sample stars ...
Spectroscopy of Be stars in young open clusters

Mathew, B; Subramaniam, A (Astronomical Society of India, 2010)

A spectroscopic study of 152 Classical Be stars in 42 young open clusters was performed using medium resolution spectra in 3700-9000 A range, to understand the Be phenomenon. The Balmer decrement is found to have a ...

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