No Open Cluster in the Ruprecht 93 Region

Details No Open Cluster in the Ruprecht 93 Region No Open Cluster in the Ruprecht 93 Region

2010-07-16

arxiv.org/abs/1007.2686v1

JKAS, 2010

Astronomy and Astrophysics

Astrophysics

Solar and Stellar Astrophysics

6 pages, 6 figures, JKAS 2010, in press (Aug issue)

Scientific paper

UBVI CCD photometry has been obtained for the Ruprecht 93 (Ru 93) region. We were unable to confirm the existence of an intermediate-age open cluster in Ru 93 from the spatial distribution of blue stars. On the other hand, we found two young star groups in the observed field: the nearer one (Ru 93 group) comprises the field young stars in the Sgr-Car arm at d ~ 2.1 kpc, while the farther one (WR 37 group) is the young stars around WR 37 at d ~ 4.8 kpc. We have derived an abnormal extinction law (Rv = 3.5) in the Ruprecht 93 region.

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