Deep photometry in the core of the open cluster NGC 5606

Details Deep photometry in the core of the open cluster NGC 5606 Deep photometry in the core of the open cluster NGC 5606

Aug 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994a%26as..106..339v&link_type=abstract

Astronomy and Astrophysics Suppl. 106, 339-348 (1994)

Astronomy and Astrophysics

Astrophysics

15

Open Cluster: Ngc 5606, Stars: Mass Function, Hr Diagram

Scientific paper

The center of the open cluster NGC 5606 has been re-observed with broad band UBVRI CCD photometry. Up to V = 18.5 likely cluster members are found underlining a sharp but not so populated cluster sequence. With this new photometry the cluster distance modulus is stated in V_0_-M_v_=11.90 (d=2400pc). The mean colour excess reaches the value =0.51. The age of the cluster from the isochrone fitting is between 6.3x10^6^ and 7x10^6^ y. Surprisingly enough there are not many stars found below V=15.5 in spite of the fact that we are observing the very core of the cluster. This lack of faint cluster stars produces in turn a flat slope for the cluster mass spectrum. In this respect our computation yields x=1.09 far enough of x=1.35 which is assumed to be the slope characterizing the mass spectrum of galactic stars.

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