Volume 385, Number 2, April II 2002
|Page(s)||404 - 411|
|Section||Cosmology (including clusters of galaxies)|
|Published online||15 April 2002|
SED, metallicity and age of halo globular clusters in M 33
National Astronomical Observatories, Chinese Academy of Sciences, Beijing, 100012, PR China
Corresponding author: J. Ma, email@example.com
Accepted: 23 January 2002
In this paper we study the properties of ten halo globular clusters in the nearby spiral galaxy M 33. CCD images of M 33 were obtained as a part of the BATC Colour Survey of the sky in 13 intermediate-band filters from 3800 to 10 000 Å. By aperture photometry, we obtain the spectral energy distributions (SEDs) of these globular clusters. We estimate the ages of our sample clusters by comparing the photometry of each object with theoretical stellar population synthesis models for different values of metallicity. Our results suggest that eight of the ten sample halo globular clusters have “intermediate” ages, i.e. between 1 and 8 Gyrs.
Key words: galaxies: photometry / galaxies: cluster: individual / galaxies: evolution
© ESO, 2002
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.