Second Parameter Effects in and between M3 and Palomar 3
天体物理学
2016-08-30 v1
摘要
We study the globular clusters M3 and Palomar 3 as a "second parameter (2ndP) pair," showing that: i) M3 has a surprisingly strong *internal* 2ndP; ii) The dispersion in mass on the Pal 3 horizontal branch (HB) is intrinsically very small, leading to the most apparent differences in HB morphology between M3 and Pal 3; iii) Ignoring the difference in HB mass dispersion between M3 and Pal 3, their relative HB types can be accounted for by a fairly small difference in age, of order 0.5-1 Gyr.
引用
@article{arxiv.astro-ph/0105350,
title = {Second Parameter Effects in and between M3 and Palomar 3},
author = {M. Catelan and R. T. Rood and F. R. Ferraro},
journal= {arXiv preprint arXiv:astro-ph/0105350},
year = {2016}
}
备注
Three pages, three figures. To appear in: "Extragalactic Star Clusters", IAU Symp. Ser. Vol. 207, ed. E. K. Grebel, D. Geisler, & D. Minniti (San Francisco: ASP)