2018ApJ...862..133S

Query : 2018ApJ...862..133S

2018ApJ...862..133S - Astrophys. J., 862, 133-133 (2018/August-1)

Blue straggler stars beyond the Milky Way. II. A binary origin for blue straggler stars in Magellanic Cloud clusters'.

SUN W., LI C., DE GRIJS R. and DENG L.

Abstract (from CDS):

We have analyzed populations of blue straggler stars (BSSs) in 24 Magellanic Cloud (MC) star clusters using multi-passband Hubble Space Telescope images. We compiled a homogeneous BSS database, containing both traditional and evolved BSSs. We uncovered a sublinear correlation between the number of BSSs in the cluster cores and the clusters' core masses, characterized by a power-law index of 0.51 ± 0.07. For low stellar collision rates, the mass-normalized number of BSSs depends only weakly (or perhaps not at all) on the collision rate, implying that the binary-driven BSS formation channel dominates. Comparison with simulations suggests that stellar collisions contribute less than 20% to the total number of BSSs formed. Further tests, including the analysis of the BSS-specific frequencies and their population numbers at larger cluster radii, suggest that binary interactions may be their main formation channel, hinting at an anti-correlation between a cluster's binary fraction and its core mass.

Abstract Copyright: © 2018. The American Astronomical Society. All rights reserved.

Journal keyword(s): blue stragglers - galaxies: star clusters: general - Magellanic Clouds

Simbad objects: 33

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Number of rows : 33
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 NGC 104 GlC 00 24 05.359 -72 04 53.20     4.09     ~ 4158 0
2 NAME SMC G 00 52 38.0 -72 48 01   2.79 2.2     ~ 12317 1
3 NGC 419 OpC 01 08 17.26 -72 53 01.8 11.41 11.16 10.50   9.34 ~ 287 0
4 NAME Magellanic Clouds GrG 03 00 -71.0           ~ 7988 0
5 NGC 1466 GlC 03 44 32.71 -71 40 18.0   11.6 11.59     ~ 166 0
6 NGC 1651 GlC 04 37 32.530 -70 35 08.71   12.99 12.28     ~ 125 0
7 NGC 1644 GlC 04 37 39 -66 12.0   13.52 12.89     ~ 39 0
8 NGC 1652 GlC 04 38 23.010 -68 40 20.51   13.95 13.13     ~ 42 0
9 NGC 1841 GlC 04 45 24.38 -83 59 53.3   12.23 11.43     ~ 190 0
10 NGC 1718 Cl* 04 52 25.040 -67 03 08.50   13.01 12.25     ~ 77 0
11 NGC 1783 GlC 04 59 08.590 -65 59 15.84   10.9 10.93     ~ 273 0
12 NGC 1806 GlC 05 02 11.180 -67 59 05.89   11.1       ~ 165 0
13 NGC 1818 GlC 05 04 13.300 -66 26 05.47           ~ 279 0
14 NGC 1831 GlC 05 06 16.12 -64 55 06.9   11.52 11.18     ~ 167 0
15 NGC 1846 Cl* 05 07 34.900 -67 27 32.45   12.08 11.31     ~ 231 0
16 NGC 1852 Cl* 05 09 23.760 -67 46 38.00   12.74 12.01     ~ 51 0
17 NGC 1868 GlC 05 14 36.60 -63 57 25.7           ~ 123 0
18 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 19090 0
19 NGC 1978 GlC 05 28 45.330 -66 14 12.04   10.7 10.70     ~ 317 0
20 IC 2146 Cl* 05 37 46 -74 47.0   13.10 12.41     ~ 35 0
21 NGC 2154 Cl* 05 57 38 -67 15.7   12.47 11.79     ~ 60 0
22 NGC 2173 GlC 05 57 58 -72 58.7   12.74 11.88     ~ 148 0
23 NGC 2203 Cl* 06 04 42.17 -75 26 15.8   12.80 11.29     ~ 54 0
24 NGC 2209 GlC 06 08 36.06 -73 50 07.9   13.58 13.15     ~ 116 0
25 NGC 2213 Cl* 06 10 42.000 -71 31 43.99           ~ 98 0
26 ESO 57-75 Cl* 06 13 27.3 -70 41 42   14.41 13.67     ~ 42 0
27 NAME Hodge 11 GlC 06 14 22.92 -69 50 54.9   12.57 11.93     ~ 117 0
28 NGC 2249 GlC 06 25 49 -68 55.2   12.66 12.23     ~ 72 0
29 NGC 2257 Cl* 06 30 12.62 -64 19 40.0   13.24 12.62     ~ 228 0
30 M 3 GlC 13 42 11.62 +28 22 38.2     6.39     ~ 2593 0
31 M 80 GlC 16 17 02.41 -22 58 33.9           ~ 780 0
32 M 13 GlC 16 41 41.634 +36 27 40.75     5.8     ~ 2291 0
33 M 30 GlC 21 40 22.12 -23 10 47.5     7.10     ~ 1121 0

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