We present accurate CCD photometry in the UBV(RI)(c) bands of a 2.9 x 2.4 arcmin(2) field centred on the young open cluster Haffner 19. Spectral types for 4 members are derived from CCD spectroscopy. 64 probable cluster members are identified down to V=18.1.The cluster lies at 5.0 kpc and suffers from a marked differential reddening [Delta E(B-V)=0.5] with a mean value E(B-V)=0.44. The extinction law conforms well to the one valid for the diffuse interstellar medium (R(V)=3.1). The main sequence is well defined over the 7-mag interval we explored, with spectral types B0 and F8-G0 on the sequence. The fit with theoretical isochrones gives an age of about 6 x 10(6) yr.
UBV(RI)C photometry and spectroscopy of the young open cluster Haffner 19
Carraro G.
1996
Abstract
We present accurate CCD photometry in the UBV(RI)(c) bands of a 2.9 x 2.4 arcmin(2) field centred on the young open cluster Haffner 19. Spectral types for 4 members are derived from CCD spectroscopy. 64 probable cluster members are identified down to V=18.1.The cluster lies at 5.0 kpc and suffers from a marked differential reddening [Delta E(B-V)=0.5] with a mean value E(B-V)=0.44. The extinction law conforms well to the one valid for the diffuse interstellar medium (R(V)=3.1). The main sequence is well defined over the 7-mag interval we explored, with spectral types B0 and F8-G0 on the sequence. The fit with theoretical isochrones gives an age of about 6 x 10(6) yr.Pubblicazioni consigliate
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