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    • Keywords


      open clusters; VRI photometry; planetary nebulae; stellar evolution; open clusters, individual: NGC 2818

    • Abstract


      The open cluster NGC 2818 containing a planetary nebula has been observed inVRI bands using the CCD system at prime focus of the 2.3-metre Vainu Bappu Telescope. The study extending to starsV ∼ 21 magnitude establishes the distance modulus as(m-M)0 = 12.9 ±0.1 for the cluster. Based on the fitting of theoretical isochrones computed for solar metallicity, an age of 5(±1) × 108 years has been assigned to the cluster. Association of the planetary nebula with the cluster indicates that the progenitor mass of the planetary nebula on the main sequence is ≥2.5M

    • Author Affiliations


      R. Surendiranath1 N. Kameswara Rao1 Ram Sagar1 J. S. Nathan1 K. K. Ghosh1

      1. Indian Institute of Astrophysics, Bangalore - 560034
    • Dates

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