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      Permanent link:
      https://www.ias.ac.in/article/fulltext/joaa/042/0109

    • Keywords

       

      Classical Be stars; slitless spectroscopy; spectral type; color–color diagram; open clusters.

    • Abstract

       

      We performed the slitless spectroscopic survey to identify classical Be (CBe) stars in openclusters older than 100 Myr. Observing a sample of 71 open clusters, we identified 13 CBe stars in 11 open clusters, one of, which (TYC 2679-432-1) is a new detection. The 13 CBe stars show both H$\alpha$ in emission and IR excess, which confirm that they possess gaseous circumstellar discs. Two more CBe stars are found toexhibit H$\alpha$ in absorption for the first time, indicating that might be passing through disc-less episode presently. The spectral-type estimation is done for all these 15 stars and it is noticed that they belong to B0.5–B8 type. Moreover, we found that the distribution of our sample is peaking near late B-types as expected.

    • Author Affiliations

       

      MADHU KASHYAP JAGADEESH1 BLESSON MATHEW1 K. T. PAUL1 GOURAV BANERJEE1 ANNAPURNI SUBRAMANIAM2 R. ARUN1

      1. Department of Physics and Electronics, Christ (Deemed to be University), Bengaluru 560 029, India.
      2. Indian Institute of Astrophysics, Bengaluru 560034, India.
    • Dates

       
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