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Browsing by Author "Mathew, B"

Browsing by Author "Mathew, B"

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  • Spectroscopic study of a few Herbig Ae/Be stars in young open clusters 
    Mathew, B; Subramaniam, A; Bhavya, B (Astronomical Society of India, 2010-03)
    In this article we give an overview of the developments in the field of spectral classification and its continued importance in the fields of stellar and galactic evolution. The extension of MK system to cool stars as well ...
  • Spectroscopic study of Be-shell stars : 4 Her and 88 Her 
    Bhat, S. S; Paul, K. T; Subramaniam, A; Mathew, B (IOP Publishing, 2016-06)
    We present an optical spectroscopic study based on 41 spectr a of 4 Her and 32 spectra of 88 Her, obtained over a period of 6 months. We estimate the rotationa l velocity of these stars from He I lines in the blue ...
  • Spectroscopic survey of emission line stars in open clusters 
    Subramaniam, A; Mathew, B (Springer, 2010)
    We summarize a study of emission-line stars in young open clusters. The study was done in two phases. The first phase was the survey, where the emission stars in young open clusters were identified using the slitless ...
  • 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 ...
  • Star formation around three co-moving HAeBe stars in the Cepheus Flare 
    Saha, Piyali; Maheswar, G; Mathew, B; Kamath, U. S (EDP Sciences, 2021-09)
    The presence of three more Herbig Ae/Be (HAeBe) candidates in the Cepheus Flare within a 1.5° radius centered on HD 200775 suggests that star formation is prevalent in a wider region of the LDN 1147/1158, LDN 1172/1174, ...
  • Star formation in the region of young open cluster - NGC 225 
    Subramaniam, A; Mathew, B; Sreeja S. K (Astronomical Society of India, 2006-12)
    NGC 225 is believed to be a 120 Myr old open cluster located at tilda 650 pc. Eight stars with H alphaemission are found to be located around the cluster, of which two are probable Herbig Be stars, indicating a very young ...
  • Studies of a possible new Herbig Ae/Be star in the open cluster NGC 7380 
    Mathew, B; Banerjee, D. P. K; Ashok, N. M; Subramaniam, A; Bhavya, B; Joshi, V (Chinese Academy of Sciences, 2012-02)
    We present a study of the star 2MASS J22472238+5801214 with the aim of identifying its true nature which has hitherto been uncertain. This object, which is a member of the young cluster NGC 7380, has been variously proposed ...
  • Study of candidate be stars in the magellanic clouds using near-infrared photometry and optical spectroscopy 
    Paul, K. T; Subramaniam, A; Mathew, B; Mennickent, R. E; Sabogal, B (Wiley-Blackwell, 2012-04)
    Mennickent et al. and Sabogal et al. identified a large number of classical Be (CBe) candidates (∼3500) in the Large and Small Magellanic Clouds (LMC and SMC) based on their photometric variability using the OGLE II data ...
  • Study of emission line stars in young open clusters 
    Mathew, B; Subramaniam, A (Astronomical Society of India, 2011)
    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 the slitless spectroscopy method ...
  • Study of emission line stars in young open clusters 
    Mathew, B (Indian Institute of Astrophysics, 2010-01)

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