2001/09/27 by Pauline Barmby, Kathryn M. Perrett, Terry J. Bridges
Physics and Astronomy · #Astronomy and Astrophysical Research #Blue straggler #Cluster (spacecraft) #Galaxies: Formation, Evolution, Phenomena #Globular cluster #Horizontal branch #Magnitude (astronomy) #Metallicity #Stellar, planetary, and galactic studies #astro-ph
paper · pdf · doi:10.1046/j.1365-8711.2002.04993.x
published as Mon.Not.Roy.Astron.Soc.329:461,2002 · MNRAS in press, 4 pages, uses mn.sty. Figure 1 is a separate JPEG
arxiv created 2001/09/27 · openalex publication_date 2002/01/01 · arxiv updated 2011/03/10 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
The M31 globular cluster candidate has long been known to be an extremely red, non stellar object. The first published spectrum of this object is used to confirm that it is a globular cluster belonging to M31, with rather typical values of and . Using the spectroscopic metallicity to predict the intrinsic colours, we derive a reddening value of , in good agreement with the value obtained using reddening free parameters. The extinction corrected magnitude of is (absolute magnitude , which makes it the most luminous globular cluster in M31. We examine van den Bergh's argument regarding the brightest and most reddened globular cluster in M31; we find that the brightest clusters are more heavily reddened than average, but this can be explained by selection effects rather than a different RV in M31.