The Next Generation Virgo Cluster Survey (NGVS). XXVII. The Size and Structure of Globular Cluster Systems and Their Connection to Dark Matter Halos
We study the size and structure of globular cluster (GC) systems of 118 early-type galaxies from the NGVS, MATLAS, and ACSVCS surveys. Fitting S & eacute;rsic profiles, we investigate the relationship between effective radii of GC systems (R-e,R-gc) and galaxy properties. GC systems are 2-4 times more extended than host galaxies across the entire stellar mass range of our sample (10(8.3)M(circle dot) < M-* < 10(11.6)M(circle dot)). The relationship between R-e,R-gc and galaxy stellar mass exhibits a characteristic "knee" at a stellar mass of M-p similar or equal to 10(10.8), similar to the galaxy R-e-stellar mass relationship. We present a new characterization of the traditional blue and red GC color subpopulations, describing them with respect to host galaxy color (Delta(gi)): GCs with similar colors to their hosts have a "red" Delta(gi), and those significantly bluer GCs have a "blue" Delta(gi). The GC populations with red Delta(gi), even in dwarf galaxies, are twice as extended as the stars, suggesting that formation or survival mechanisms favor the outer regions. We find a tight correlation between R-e,R-gc and the total number of GCs, with intrinsic scatter less than or similar to 0.1 dex spanning two and three orders of magnitude in size and number, respectively. This holds for both red and blue subpopulations, albeit with different slopes. Assuming that N-GC,N-Total correlates with M-200, we find that the red GC systems have effective radii of roughly 1%-5% R-200, while the blue GC systems in massive galaxies can have sizes as large as similar to 10% R-200. Environmental dependence on R-e,R-gc is also found, with lower-density environments exhibiting more extended GC systems at fixed mass.
WOS:001221173800001
2024-05-01
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Funder | Grant Number |
National Research Foundation of Korea (NRF) grant - Korea government (MSIT) | NRF-2021R1C1C2006790 |
National Natural Science Foundation of China (NSFC) | 12173025 |
The 111 project | B20019 |
Key Laboratory for Particle Physics, Astrophysics and Cosmology, Ministry of Education | |
ANID/CONICYT through FONDECYT Postdoctoral Fellowship | 3200959 |
Swiss National Science Foundation | PZ00P2_202104 |
National Science Foundation | |
Project of CFHT | |
CEA/DAPNIA, at the Canada-France-Hawaii Telescope (CFHT) | |
Alfred P. Sloan Foundation | |
Alfred P. Sloan Foundation | |
Alfred P. Sloan Foundation | |
Alfred P. Sloan Foundation | |
U.S. Department of Energy Office of Science | |
U.S. Department of Energy Office of Science | |
U.S. Department of Energy Office of Science | |
U.S. Department of Energy Office of Science | |
NASA | NAS 5-26555 |
NASA | |
Swiss National Science Foundation (SNF) | PZ00P2_202104 |