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Student Number 962209012
Author Chien-Hui Kao(df)
Author's Email Address m969012@astro.ncu.edu.tw
Statistics This thesis had been viewed 771 times. Download 390 times.
Department Graduate Institute of Astronomy
Year 2009
Semester 2
Degree Master
Type of Document Master's Thesis
Language English
Title Membership of Star Clusters Using the UCAC Proper Motion Data
Date of Defense 2010-06-15
Page Count 54
Keyword
  • porper motion
  • star cluster
  • UCAC
  • Abstract Abstract
    Members in a star cluster share common location and motion in space, and are seen as grouping in the sky. We have developed a method to use the USNO CCD Astrograph Catalog (UCAC) proper motion database to distinguish probable members in a star cluster against field stars.  With a couple of examples, we show how kinematic membership information allows us to better determine the distance of a star cluster than photometry alone. The distance is found to be 18510 pc for M44, and 45310 pc for NGC752.  In the course of our study, we found inconsistency of the intrinsic 2MASS colors of dwarfs and giants commonly used in the literature, apparently because of reddening in the Galactic plane. This problem has been considered in our distance measurement.
    Table of Content Chapter 1  Introduction1
    1.1 Open clusters1
    1.2 Membership V Proper Motions5
    1.3 Clusters studied in the work by Proper Motions7
    Chapter 2  Archival Data and Analysis13
    2.1 USNO CCD Astrograph Catalog (UCAC)13
    2.2 Two Micron All Sky Survey (2MASS)20
    Chapter 3  Results and Discussions24
    3.1 M4424
    3.2 NGC75229
    3.3 Discussions34
    3.4 Conclusion35
    Bibliography36
    Appendix38
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    Advisor
  • Wen-Ping Chen()
  • Files
  • 962209012.pdf
  • approve immediately
    Date of Submission 2010-07-20

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