Bibcode
Saviane, I.; Piotto, G.; Fagotto, F.; Zaggia, S.; Capaccioli, M.; Aparicio, A.
Bibliographical reference
IAA-IAC-University of Pisa Workshop: The formation of the Milky Way, p. 301 - 302
Advertised on:
0
1995
Citations
1
Refereed citations
1
Description
The authors present VI CCD photometry for nine fields towards the centre
of NGC 1851 covering an area of 22×22 arcmin2, out to
1.2 tidal radii. These were observed during two nights in February 1993
at the ESO 3.5-metre NTT telescope + EMMI. The sample consists of
≡20500 stars reaching V = 22 or I = 21.5 at the 50% completeness
level. These data have been collected within a project of mapping the
stellar distribution of a sample of galactic GCs, in order to detect the
effects of dynamical evolution and to reconstruct the stellar initial
mass function (IMF). The mass function (MF) slope of NGC 1851 is x =
1.0±0.5, in agreement with the general scenario of an MF
depending on the position in the galactic gravitational potential and
metal content of the cluster. The authors also plan to check the
influence of environmental parameters such as concentration on the
evolution of their stellar populations. As a by-product of this research
they exploit their database to investigate the evolved stages of stellar
evolution of low-mass stars.