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The Kinematics of Globular Cluster NGC 288

  • Chan-Kao Chang (a1), Alfred B. Chen (a2), Wean-Shun Tsay (a2), Wen-Ping Chen (a2) and Phillip K. Lu (a3)...

Abstract

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.

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References

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

The Kinematics of Globular Cluster NGC 288

  • Chan-Kao Chang (a1), Alfred B. Chen (a2), Wean-Shun Tsay (a2), Wen-Ping Chen (a2) and Phillip K. Lu (a3)...

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