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The Kinematics of Globular Cluster NGC 288

Published online by Cambridge University Press:  12 April 2016

Chan-Kao Chang ,
Alfred B. Chen ,
Wean-Shun Tsay ,
Wen-Ping Chen  and
Phillip K. Lu
Chan-Kao Chang
Affiliation:
Institute of Astronomy, National Central University, 32054 Chung-li, Taiwan; rex@phy.ncu.edu.tw
Alfred B. Chen
Affiliation:
Institute of Astronomy, National Central University, 32054 Chung-li, Taiwan
Wean-Shun Tsay
Affiliation:
Institute of Astronomy, National Central University, 32054 Chung-li, Taiwan
Wen-Ping Chen
Affiliation:
Institute of Astronomy, National Central University, 32054 Chung-li, Taiwan
Phillip K. Lu
Affiliation:
Department of Astronomy, Yale University, P.O. Box 208101, New Haven, CT 06520, USA

Abstract

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The mean radial velocity of NGC 288 (accuracy 5.5 km/s) is determined to be −56.3 ± 20.1 km/s which, when combined with the mean proper motion (Guo, 1995), yields a peculiar velocity with respect to the LSR of (u,v,w) = (29.7 ± 18.1, −258.6 ± 18.3,62.3 ± 20.3) km/s. This implies that NGC 288 moves in a retrograde sense with the Galactic rotation. We also derived the effective temperatures for stars in our sample and, as a corroborative effort, compared with those estimated previously from the BATC data (Tsai 1998) by spectral energy distribution fitting. We demonstrate that the BATC/SED fitting is an appropriate and efficient way to estimate the effective temperature of a star.

Type
VII. Science With Small Telescopes
Information
International Astronomical Union Colloquium , Volume 183: Small-Telescope Astronomy on Global Scales , 2001 , pp. 333 - 334
Copyright
Copyright © Astronomical Society of the Pacific 2001

References

Chen, A.B.-C., Tsay, W.-S., Tsai, W.-S., Lu, P.K. 2000, AJ, 120, 2569 CrossRefGoogle Scholar
Guo, X. 1995, Ph.D dissertation, Yale University Google Scholar
Mihalas, D., Binney, J. 1981, Galactic Astronomy: Structrue and Kinematics, 2nd ed., (Freeman)Google Scholar