Spectral Energy Distributions and Age Estimates of 172 Globular Clusters in M31

Details Spectral Energy Distributions and Age Estimates of 172 Globular Clusters in M31 Spectral Energy Distributions and Age Estimates of 172 Globular Clusters in M31

2002-11-03

arxiv.org/abs/astro-ph/0211037v1

Astronomy and Astrophysics

Astrophysics

38 pages, 7 figures will appear in the February 2003 issue of AJ

Scientific paper

10.1086/345885

In this paper we present CCD multicolor photometry for 172 globular clusters (GCs), taken from the Bologna catalog (Battistini et al. 1987), in the nearby spiral galaxy M31. The observations were carried out by using the National Astronomical Observatories 60/90 cm Schmidt Telescope in 13 intermediate-band filters, which covered a range of wavelength from 3800 to 10000A. This provides a multicolor map of M31 in pixels of 1.7"*1.7". By aperture photometry, we obtain the spectral energy distributions (SEDs) for these GCs. Using the relationship between the BATC intermediate-band system used for the observations and the UBVRI broad-band system, the magnitudes in the B and V bands are derived. The computed V and B-V are in agreement with the values given by Battistini et al. (1987) and Barmby et al. (2000). Finally, by comparing the photometry of each GC with theoretical stellar population synthesis models, we estimate ages of the sample GCs for different metallicities. The results show that nearly all our sample GCs have ages more than 10^{9} years, and most of them are around 10^{10} years old. Also, we find that GCs fitted by the metal-poor model are generally older than ones fitted by the metal-rich model.

Affiliated with

Also associated with

No associations

Rating

Spectral Energy Distributions and Age Estimates of 172 Globular Clusters in M31 does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Spectral Energy Distributions and Age Estimates of 172 Globular Clusters in M31, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Spectral Energy Distributions and Age Estimates of 172 Globular Clusters in M31 will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-589985