Deep CCD BV photometry of the poorly studied open cluster NGC 4815.

Details Deep CCD BV photometry of the poorly studied open cluster NGC 4815. Deep CCD BV photometry of the poorly studied open cluster NGC 4815.

Sep 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994a%26as..106..573c&link_type=abstract

Astronomy and Astrophysics Suppl. 106, 573-579 (1994)

Astronomy and Astrophysics

Astrophysics

10

Open Clusters: Ngc 4815: Hr Diagram, Luminosity Function

Scientific paper

We report BV Johnson CCD photometry of 2498 stars in the region of the poorly studied open cluster NGC 4815. This object appears in the Janes (1988) list of possible old open clusters. NGC 4815 lies in the galactic plane, in a region of strong absorption. The color magnitude diagram (CMD) we derive shows that NGC 4815 has about the Hyades age (5x10^8^yr) and a probable lower than solar metal abundance. The color excess E_B-V_ and the distance modulus (m-M) turn out to be 0.70 and 14.10, respectively. Accordingly a distance of 2.5 Kpc from the Sun is derived. The luminosity function (LF) we obtain for the main sequence (MS) stars is consistent with a Salpeter (x=1.55) initial mass function (IMF).

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