Radial velocities of five globular clusters obtained with AAOmega

P. Székely, L. L. Kiss, K. Szatmáry, B. Csák, G. Á Bakos, T. R. Bedding

Research output: Contribution to journalArticle

4 Scopus citations

Abstract

Using the recently commissioned multi-object spectrograph AAOmega on the 3.9 m AAT we have obtained mediumresolution near-infrared spectra for 10500 stars in and around five southern globular clusters. The targets were 47 Tuc, M12, M30, M55 and NGC 288. We have measured radial velocities to ±1 km s-1 with the cross correlation method and estimated metallicity, effective temperature, surface gravity and rotational velocity for each star by fitting synthetic model spectra. An analysis of the velocity maps and velocity dispersion of member stars revealed systemic rotation in four of the target clusters.

Original languageEnglish (US)
Pages (from-to)879-882
Number of pages4
JournalAstronomische Nachrichten
Volume328
Issue number8
DOIs
StatePublished - Aug 1 2007
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics
  • Space and Planetary Science

Keywords

  • Galaxy: halo
  • Galaxy: kinematics and dynamics
  • Globular clusters

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    Székely, P., Kiss, L. L., Szatmáry, K., Csák, B., Bakos, G. Á., & Bedding, T. R. (2007). Radial velocities of five globular clusters obtained with AAOmega. Astronomische Nachrichten, 328(8), 879-882. https://doi.org/10.1002/asna.200710819