M31 Globular Clusters in the HST Archive: II. Structural Parameters

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dc.creatorBarmby, P.
dc.creatorHolland, S.
dc.creatorHuchra, J. P.
dc.date2002-01-15
dc.date.accessioned2026-07-07T06:18:55Z
dc.date.available2026-07-07T06:18:55Z
dc.descriptionWe analyze the structural parameters of the largest-available sample of spatially resolved extragalactic globular clusters. The images of M31 GCs were found in a search of HST archival data, described in a companion paper. We measure the ellipticities and position angles of the clusters and conclude that the ellipticities are consistent with being caused by rotation. We find that most clusters' surface brightness distributions are well-fit by two-dimensional single-mass Michie-King models. A few clusters show possible power-law distributions characteristic of core-collapse, but the spatial resolution is not high enough to make definitive claims. As has been found for other galaxies, the metal-rich clusters are slightly smaller than the metal-poor clusters. There are strong correlations between structural properties of M31 GCs, as for Milky Way clusters, and the two populations are located close to the same `fundamental plane' in parameter space.
dc.descriptionAccepted to AJ; 33 pages including 12 figures and 3 tables
dc.identifierhttps://arxiv.org/abs/astro-ph/0201253
dc.identifierhttp://arxiv.org/abs/astro-ph/0201253
dc.identifierAstron.J. 123 (2002) 1937
dc.identifierdoi:10.1086/339667
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/94901
dc.subjectAstrophysics
dc.titleM31 Globular Clusters in the HST Archive: II. Structural Parameters
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