2019MNRAS.482..231L

Query : 2019MNRAS.482..231L

2019MNRAS.482..231L - Mon. Not. R. Astron. Soc., 482, 231-239 (2019/January-1)

Constraints on blue straggler formation mechanisms in galactic globular clusters from proper motion velocity distributions.

LEIGH N.W.C., PANURACH T., SIMUNOVIC M., GELLER A.M., ZUREK D., SHARA M.M., SILLS A., KNIGGE C., GOSNELL N.M., MATHIEU R., PUZIA T.H., VENTURA J. and MINOR Q.

Abstract (from CDS):

For a sample of 38 galactic globular clusters (GCs), we confront the observed distributions of blue straggler (BS) proper motions and masses (derived from isochrone fitting) from the BS catalogue of Simunovic & Puzia with theoretical predictions for each of the two main competing BS formation mechanisms. These are mass transfer from an evolved donor on to a main-sequence (MS) star in a close binary system, and direct collisions involving MS stars during binary encounters. We use the FEWBODY code to perform simulations of single-binary and binary-binary interactions. This provides collisional velocity and mass distributions for comparison to the observed distributions. Most clusters are consistent with BSs derived from a dynamically relaxed population, supportive of the binary mass-transfer scenario. In a few clusters, including all the post-core collapse clusters in our sample, the collisional velocities provide the best fit.

Abstract Copyright: © 2018 The Author(s) Published by Oxford University Press on behalf of the Royal Astronomical Society

Journal keyword(s): scattering - binaries: general - blue stragglers - globular clusters: general

Simbad objects: 32

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Number of rows : 32
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 NGC 362 GlC 01 03 14.26 -70 50 55.6     6.58     ~ 1167 0
3 NGC 1261 GlC 03 12 16.21 -55 12 58.4     8.63     ~ 579 0
4 NGC 3201 GlC 10 17 36.82 -46 24 44.9           ~ 1001 0
5 M 68 GlC 12 39 27.98 -26 44 38.6     7.96     ~ 1069 0
6 NGC 4833 GlC 12 59 33.92 -70 52 35.4           ~ 467 0
7 NGC 5286 GlC 13 46 26.81 -51 22 27.3           ~ 485 0
8 NGC 5927 GlC 15 28 00.69 -50 40 22.9           ~ 499 0
9 M 4 GlC 16 23 35.22 -26 31 32.7           ~ 1978 0
10 NGC 6101 GlC 16 25 48.12 -72 12 07.9           ~ 337 0
11 M 107 GlC 16 32 31.86 -13 03 13.6           ~ 835 0
12 M 12 GlC 16 47 14.18 -01 56 54.7     6.07     ~ 736 0
13 M 10 GlC 16 57 09.05 -04 06 01.1     4.98     ~ 857 0
14 NGC 6304 GlC 17 14 32.25 -29 27 43.3           ~ 394 0
15 M 92 GlC 17 17 07.39 +43 08 09.4     6.52     ~ 2240 0
16 NGC 6352 GlC 17 25 29.11 -48 25 19.8           ~ 425 0
17 NGC 6366 GlC 17 27 44.24 -05 04 47.5           ~ 344 0
18 NGC 6362 GlC 17 31 54.99 -67 02 54.0           ~ 637 0
19 NGC 6388 GlC 17 36 17.461 -44 44 08.34           ~ 988 1
20 NGC 6541 GlC 18 08 02.36 -43 42 53.6           ~ 409 0
21 NGC 6584 GlC 18 18 37.60 -52 12 56.8     8.17     ~ 317 0
22 NGC 6624 GlC 18 23 40.51 -30 21 39.7           ~ 939 1
23 M 69 GlC 18 31 23.10 -32 20 53.1           ~ 492 0
24 NGC 6652 GlC 18 35 45.63 -32 59 26.6           ~ 474 0
25 M 22 GlC 18 36 23.94 -23 54 17.1           ~ 1459 0
26 M 70 GlC 18 43 12.76 -32 17 31.6           ~ 421 0
27 NGC 6717 GlC 18 55 06.04 -22 42 05.3           ~ 273 0
28 NGC 6723 GlC 18 59 33.15 -36 37 56.1           ~ 543 0
29 M 55 GlC 19 39 59.71 -30 57 53.1     6.49     ~ 913 0
30 M 71 GlC 19 53 46.49 +18 46 45.1           ~ 1190 0
31 M 2 GlC 21 33 27.02 -00 49 23.7     6.25     ~ 1114 1
32 M 30 GlC 21 40 22.12 -23 10 47.5     7.10     ~ 1121 0

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