Oral Presentation

Sejong Open Cluster Survey (SOS) – current status

Author(s): Hwankyung Sung (Department of Physics and Astronomy, Sejong University, Seoul, Korea)

Presenter: Hwankyung Sung (Department of Physics and Astronomy, Sejong University)

Star clusters are superb astrophysical laboratories containing co-spatial and coeval samples of stars
with similar chemical composition. We have initiated the Sejong Open cluster Survey (SOS) - a project
dedicated to providing homogeneous photometry of a large number of open clusters in the SAAO
Johnson-Cousins’ UBV I system. We used the AZT-22 1.5m telescope at Maidanak Astronomical Observatory in Uzbekistan and the Kuiper 61’’ telescope at Mt. Bigelow, Arizona in USA for the observation of open clusters in the northern hemisphere. Currently we are conducting the observation of open clusters in the southern hemisphere with the 0.9m telescope at CTIO. In this workshop, we report the current status of the project and discuss some preliminary results on the stellar initial mass function.
We propose a project to study the large-scale star formation process - star formation history and triggering mechanisms in the OB associations.