2012A&A...538A..18B


C.D.S. - SIMBAD4 rel 1.7 - 2019.10.19CEST18:07:39

2012A&A...538A..18B - Astronomy and Astrophysics, volume 538A, 18-18 (2012/2-1)

Na-O anticorrelation and HB. IX. Kinematics of the program clusters a link between systemic rotation and HB morphology?

BELLAZZINI M., BRAGAGLIA A., CARRETTA E., GRATTON R.G., LUCATELLO S., CATANZARO G. and LEONE F.

Abstract (from CDS):

We use accurate radial velocities for 1981 member stars in 20 Galactic globular clusters, collected within our large survey aimed at analyzing the Na-O anti-correlation, to study the internal kinematics of the clusters. We performed the first systematic exploration of the possible connections between cluster kinematics and the multiple populations phenomenon in GCs. We did not find any significant correlation between Na abundance and either velocity dispersion or systemic rotation. We searched for systemic rotation in the eight clusters of our sample that lack this analysis from previous works in the literature (NGC2808, NGC5904, NGC6171, NGC6254, NGC6397, NGC6388, NGC6441, and NGC6838). These clusters are found to span a wide range of rotational amplitudes from ∼0.0km/s (NGC6397) to ∼13.0km/s (NGC6441). We found a significant correlation between the ratio of rotational velocity to central velocity dispersion (Vrot0) and the horizontal branch morphology parameter (B-R)/(B+R+V). The ratio Vrot0 is found to correlate also with metallicity, possibly hinting at a significant role for dissipation in the process of formation of globular clusters; Vrot is found to correlate well with (B-R)/(B+R+V), MV, σ0, and [Fe/H]. All these correlations strongly suggest that systemic rotation may be intimately linked with the processes that led to the formation of globular clusters and the stellar populations they host.

Abstract Copyright:

Journal keyword(s): globular clusters: general - stars: abundances

Simbad objects: 28

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Number of rows : 28

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2019
#notes
1 NGC 104 GlC 00 24 05.359 -72 04 53.20   5.78 4.09     ~ 3463 0
2 NGC 288 GlC 00 52 45.24 -26 34 57.4   10 8.13     ~ 887 0
3 NGC 1851 GlC 05 14 06.76 -40 02 47.6   8.80 7.23     ~ 1206 0
4 M 79 GlC 05 24 10.59 -24 31 27.3   9.21 8.16     ~ 690 0
5 NGC 2419 GlC 07 38 08.51 +38 52 54.9     10.05     ~ 784 0
6 IRAS 09110-6439 GlC 09 12 03.10 -64 51 48.6   7.77 5.69     ~ 1200 0
7 NGC 3201 GlC 10 17 36.82 -46 24 44.9   9.18 8.24     ~ 685 0
8 M 68 GlC 12 39 27.98 -26 44 38.6   10.26 7.96     ~ 854 0
9 M 53 GlC 13 12 55.25 +18 10 05.4   8.95 7.79     ~ 688 0
10 NGC 5139 GlC 13 26 47.28 -47 28 46.1   6.12 5.33     ~ 2908 0
11 M 5 GlC 15 18 33.22 +02 04 51.7   7.34 5.95     ~ 1723 0
12 M 4 GlC 16 23 35.22 -26 31 32.7           ~ 1632 0
13 M 107 GlC 16 32 31.86 -13 03 13.6   9.96 8.85     ~ 680 0
14 M 12 GlC 16 47 14.18 -01 56 54.7   8.52 6.07     ~ 555 0
15 M 10 GlC 16 57 09.05 -04 06 01.1     4.98     ~ 653 0
16 NGC 6388 GlC 17 36 17.461 -44 44 08.34   7.40       ~ 771 1
17 NGC 6397 GlC 17 40 42.09 -53 40 27.6   7.39 5.17     ~ 1751 1
18 NAME Gal Center reg 17 45 40.04 -29 00 28.1           ~ 11004 0
19 Cl Terzan 5 Cl* 17 48 05.00 -24 46 48.0           ~ 660 1
20 NGC 6441 GlC 17 50 13.06 -37 03 05.2   9.26 8.00     ~ 739 0
21 M 22 GlC 18 36 23.94 -23 54 17.1   7.16 6.17     ~ 1175 0
22 M 54 GlC 18 55 03.33 -30 28 47.5           ~ 856 0
23 NGC 6752 GlC 19 10 52.11 -59 59 04.4   6.96 6.28     ~ 1763 0
24 M 55 GlC 19 39 59.71 -30 57 53.1     6.49     ~ 732 0
25 M 71 GlC 19 53 46.49 +18 46 45.1   7.91 6.1     ~ 997 0
26 M 15 GlC 21 29 58.33 +12 10 01.2   3       ~ 2842 0
27 M 30 GlC 21 40 22.12 -23 10 47.5     7.10     ~ 880 0
28 NAME Galactic Bulge reg ~ ~           ~ 3233 0

    Equat.    Gal    SGal    Ecl

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2019.10.19-18:07:39

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