First CCD UBVI photometric analysis of six open cluster candidates

Details First CCD UBVI photometric analysis of six open cluster candidates First CCD UBVI photometric analysis of six open cluster candidates

Apr 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011newa...16..161p&link_type=abstract

New Astronomy, Volume 16, Issue 3, p. 161-172.

Astronomy and Astrophysics

Astronomy

3

Scientific paper

We have obtained CCD UBVIKC photometry down to V ˜ 22 for the open cluster candidates Haffner 3, Haffner 5, NGC 2368, Haffner 25, Hogg 3 and Hogg 4 and their surrounding fields. None of these objects have been photometrically studied so far. Our analysis shows that these stellar groups are not genuine open clusters since no clear main sequences or other meaningful features can be seen in their colour-magnitude and colour-colour diagrams. We checked for possible differential reddening across the studied fields that could be hiding the characteristics of real open clusters. However, the dust in the directions to these objects appears to be uniformly distributed. Moreover, star counts carried out within and outside the open cluster candidate fields do not support the hypothesis that these objects are real open clusters or even open cluster remnants.

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