Astron. Astrophys. 351, 526-532 (1999)

CCD photometry of young MC clusters I: NGC 2172 ^*

V. Ripepi ¹, E. Brocato ² and V. Castellani <sup>3

1</sup> Osservatorio Astronomico di Capodimonte, via Moiariello 16, 80131 Napoli Italy
² Osservatorio Astronomico di Collurania, Via Maggini, 64100 Teramo, Italy
³ Dipartimento di Fisica, Piazza Torricelli, 2, 56100 Pisa, Italy

Received 21 December 1998 / Accepted 21 September 1999

Abstract

We present a new CCD photometry for the young LMC cluster NGC 2172, giving magnitudes for more than 600 stars within from the cluster center, down to -approximately- V= 21 mag. After correction for completeness and field stars contamination, we discuss the cluster HR diagram and the MS luminosity function in the light of current evolutionary theories and in connection with the problem of cluster age.

Key words: stars: evolution stars: fundamental parameters stars: luminosity function, mass function galaxies: Magellanic Clouds galaxies: star clusters

* Based on observations collected at the European Southern Observatory, La Silla, Chile

Send offprint requests to: V. Ripepi (ripepi@na.astro.it)

SIMBAD Objects

Contents

• 1. Introduction
• 2. Observations, data reduction and calibration
  • 2.1. Calibration
  • 2.2. Comparison with previous photometry
• 3. The CM diagram
• 4. Comparison with evolutionary theories
• 5. Final remarks
• Acknowledgements
• References

© European Southern Observatory (ESO) 1999

Online publication: November 3, 1999
helpdesk.link@springer.de