Multicolour Photometric Study of M31 Globular Clusters
arXiv:0906.1519 · doi:10.1088/1674-4527/9/9/005
Abstract
We present the photometry of 30 globular clusters (GCs) and GC candidates in 15 intermediate-band filters covering from ~3000 to ~10000 Åusing the archival CCD images of M31 observed as part of the Beijing - Arizona - Taiwan - Connecticut (BATC) Multicolour Sky Survey. We transform these intermediate-band photometric data to the photometry in the standard UBVRI broad-bands. These M31 GC candidates are selected from the Revised Bologna Catalogue (RBC V.3.5), and most of these candidates do not have any photometric data. Therefore the present photometric data are supplement to RBC V.3.5. We find that 4 out of 61 GCs and GC candidates in RBC V.3.5 do not show any signal on the BATC images at their locations. By linear fit of the distribution in colour-magnitude diagram of blue GCs and GC candidates using the data from RBC V.3.5, and in this study we find the ``blue-tilt'' of blue M31 GCs with a high confidence at 99.95% or 3.47 sigma for the confirmed GCs, and >99.99% or 4.87 sigma for GCs and GC candidates.
Accepted for publication in RAA. 22 pages including 9 figures and 6 tables
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- Globular Clusters in the Outer Halo of M31
- Age and mass constraints for a young massive cluster in M31 based on spectral-energy-distribution fitting
- Age and mass studies for young star clusters in M31 from SEDs-fit
- 2MASS photometry and age estimate of globular clusters in the outer halo of M31