Core collapse and horizontal-branch morphology in Galactic globular clusters

Context. Stellar collision rates in globular clusters (GCs) do not appear to correlate with horizontal branch (HB) morphology, suggesting that dynamics does not play a role in the second-parameter problem. However, core densities and collision rates derived from surface-brightness may be significant...

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Veröffentlicht in:	Astronomy and astrophysics (Berlin) 2013-06, Vol.554, p.1-6
Hauptverfasser:	Pasquato, M., Raimondo, G., Brocato, E., Chung, C., Moraghan, A., Lee, Y.-W.
Format:	Artikel
Sprache:	eng
Schlagworte:	Age Collapse Collision rates Density globular clusters: general Luminosity Metallicity methods: numerical methods: statistical Morphology Pictures stars: evolution stars: mass-loss
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