Astron. Astrophys. 326, 614-619 (1997)

small.htm

V, I photometry of the metal-rich bulge globular cluster Terzan 2 ^*

S. Ortolani ¹, E. Bica ² and B. Barbuy <sup>3

1</sup> Università di Padova, Dept. di Astronomia, Vicolo dell'Osservatorio 5, I-35122 Padova, Italy
² Universidade Federal do Rio Grande do Sul, Dept. de Astronomia, CP 15051, Porto Alegre 91500-970, Brazil
³ Universidade de São Paulo, CP 9638, São Paulo 01065-970, Brazil

Received 25 September 1996 / Accepted 18 November 1996

Abstract

We present for the first time optical colour magnitude diagrams of the globular cluster Terzan 2, in the V, I colours. The horizontal branch is red. The red giant branch morphology can be fitted with that of 47 Tuc, but definitely not that of NGC 6553.

We derive a reddening of E(B-V) = 1.54 and a distance d = 7.7 kpc if R = 3.1, or 5.3 kpc if R = 3.6. Terzan 2 adds to the list of bulge metal-rich clusters now with reliable parameters.

Key words: globular clusters: Terzan 2HR diagramGalaxy: abundancesGalaxy: center

* Observations collected at the European Southern Observatory - ESO, Chile; Table 2 is available only in electronic form at the CDS via anonymous ftp 130.79.128.5

SIMBAD Objects

Contents

• 1. Introduction
• 2. Observations
• 3. Colour-magnitude diagrams
• 4. Cluster parameters
  • 4.1. Metallicity
  • 4.2. Reddening and distance
  • 4.3. Parameters for the field
• 5. Conclusions
• Acknowledgements
• References

© European Southern Observatory (ESO) 1997

Online publication: October 15, 1997
helpdesk.link@springer.de