Journal of The Korean Astronomical Society (천문학회지)

The Korean Astronomical Society (한국천문학회)
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NO OPEN CLUSTER IN THE RUPRECHT 93 REGION

  • Cheon, So-Ra (Department of Astronomy and Space Science, Sejong University) ;
  • Sung, Hwan-Kyung (Department of Astronomy and Space Science, Sejong University) ;
  • Bessell, M.S. (Research School of Astronomy and Astrophysics, Australian National University)
  • Received : 2010.06.16
  • Accepted : 2010.06.29
  • Published : 2010.08.31
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Abstract

UBVI CCD photometry is obtained for the Ruprecht 93 (Ru 93)region. We are 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 find 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 $d{\approx}2.1$ kpc, while the farther one (WR 37 group) is the young stars around WR 37 at $d{\approx}4.8$ kpc. We derive an abnormal extinction law ($R_V$ = 3.5) in the Ruprecht 93 region.

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References

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