Structural parameters and masses for three old LMC clusters

Abstract

view Abstract Citations (35) References (12) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Structural parameters and masses for three old LMC clusters. Elson, R. A. W. ; Freeman, K. C. Abstract Luminosity profiles are presented for three old LMC clusters, NGC 1835, NGC 2210, and NGC 2257. King models are fitted to the profiles, the core and tidal radii are determined, and the total mass of each cluster is deduced. Total luminosities and mass-to-light ratios are also derived. For NGC 1835 a dynamical mass is determined from the cluster's velocity dispersion, obtained from a spectrum of its integrated light. Lower limits on tidal mass-to-light ratios are 0.18 + or 0.03, 0.11 + or - 0.02, and 0.56 + or - 0.09 for NGC 1835, NGC 2210, and NGC 2257, respectively. The velocity dispersion measurement yields a mass-to-light ratio for NGC 1835 of 0.42 + or - 0.08. These values are up to 3 times larger than previous determinations. The values for NGC 1835 and NGC 2210 are still somewhat smaller than mass-to-light ratios of Milky Way globulars or of NGC 2257, and it is suggested that this reflects a difference in age. Publication: The Astrophysical Journal Pub Date: January 1985 DOI: 10.1086/162817 Bibcode: 1985ApJ...288..521E Keywords: Galactic Structure; Globular Clusters; Magellanic Clouds; Mass To Light Ratios; Stellar Evolution; Astronomical Photometry; Milky Way Galaxy; Power Spectra; Astrophysics full text sources ADS | data products SIMBAD (4) NED (1)