The Globular Cluster Content of Maffei 1

Abstract

Near-infrared images have been used to search for bright globular clusters near the center of the elliptical galaxy Maffei 1. The number of objects in various radial intervals from the center of Maffei 1 are compared with the number density of sources in two control fields, and we find an excess of 31 +/- 11 objects with K between 16.6 and 18.0 in an annulus between 20 and 90 arcsec from the galaxy center. At radii in excess of 90 arcsec the ability to find clusters is frustrated by statistical noise in the foreground star population. It is demonstrated that the globular clusters located within 90 arcsec of the center of Maffei 1 span a range of near-infrared colors that are at least as great as that which is seen among M31 clusters; some of the clusters appear to have colors that are consistent with them being very young. The specific globular cluster frequency within 90 arcsec of the center of Maffei 1 is S_N = 1.3 +/- 0.6 if the distance modulus is 28.1 +/- 0.2 and A_V = 4.7 +/- 0.2. The specific cluster frequency of Maffei 1 is thus similar to that of other nearby field elliptical galaxies.

34 pages, including 10 eps figures; To appear in the PASP

References in corpus (6)

• Formation of omega Centauri from an ancient nucleated dwarf galaxy in the young Galactic disc
• Globular clusters and the formation of the outer Galactic halo
• Metal-Poor Globular Clusters and Galaxy Formation
• Kinematics of Tidal Debris from Omega Centauri's Progenitor Galaxy
• The Extinction and Distance of Maffei 1
• The Metallicity of Pre-Galactic Globular Clusters: Observational consequences of the first stars

Cited by in corpus (4)

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• Raven and the Center of Maffei 1: Multi-Object Adaptive Optics Observations of the Center of a Nearby Elliptical Galaxy and the Detection of an Intermediate Age Population
• Astrophysics in 2005