2006A&A...451..499M


C.D.S. - SIMBAD4 rel 1.7 - 2021.02.25CET21:13:49

2006A&A...451..499M - Astronomy and Astrophysics, volume 451, 499-513 (2006/5-4)

The lack of close binaries among hot horizontal branch stars in NGC 6752.

MONI BIDIN C., MOEHLER S., PIOTTO G., RECIO-BLANCO A., MOMANY Y. and MENDEZ R.A.

Abstract (from CDS):

We present the results of a spectroscopic search for close binaries among horizontal branch (HB) stars in NGC 6752. We used the ESO VLT-FORS2 instrument to obtain medium resolution (R=4100) spectra of 51 hot HB stars with 8000K≤Teff≤32000K during four consecutive nights. Eighteen of our targets are extreme horizontal branch (EHB) stars with Teff≥22000K. Radial velocity variations were measured with cross-correlation techniques, previously evaluated the statistical and systematic errors associated with them. No close binary system has been detected among our 51 targets. The data corrected for instrumental effects indicate that the radial velocity variations are always below ≃15km/s (3σ level). From a statistical analysis of our results, we conclude that (at 95% confidence level) the fraction of binaries with a ∼0.5M companion among EHB stars in NGC 6752 is smaller than 20%. This empirical evidence sharply contrasts with what has been found for hot subdwarfs in the field, and opens new questions about the formation of EHB stars in globular clusters (and possibly in the field as well).

Abstract Copyright:

Journal keyword(s): stars: horizontal-branch - binaries: close - binaries : spectroscopic - globular clusters: individual: NGC 6752

CDS comments: Table 1: Cl* NGC 6752 PKD NNNNN, see 2002A&A...391..945P and Piotto database.

Simbad objects: 63

goto Full paper

goto View the reference in ADS

Number of rows : 63

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2021
#notes
1 NGC 104 GlC 00 24 05.359 -72 04 53.20   5.78 4.09     ~ 3614 0
2 M 31 G 00 42 44.330 +41 16 07.50 4.86 4.36 3.44     ~ 11200 1
3 NGC 2808 GlC 09 12 03.10 -64 51 48.6   7.77 5.69     ~ 1275 0
4 BD-07 3477 HS* 12 44 20.2386520980 -08 40 16.848587212   10.46 10.594 10.895   sdB2VIIHe3 257 1
5 NGC 5139 GlC 13 26 47.28 -47 28 46.1   6.12 5.33     ~ 3069 0
6 M 3 GlC 13 42 11.62 +28 22 38.2     6.39     ~ 2297 0
7 M 13 GlC 16 41 41.634 +36 27 40.75     5.8     ~ 2035 0
8 NGC 6388 GlC 17 36 17.461 -44 44 08.34   7.40       ~ 826 1
9 NGC 6441 GlC 17 50 13.06 -37 03 05.2   9.26 8.00     ~ 787 0
10 Cl* NGC 6752 PKD 36830 * 19 10 02.4578373383 -59 58 03.504217503   16.197 17.388     ~ 3 0
11 Cl* NGC 6752 PKD 38963 * 19 10 03.4455551891 -59 54 46.539844533   14.154 14.25     ~ 4 0
12 Cl* NGC 6752 PKD 38889 * 19 10 09.8378990517 -59 54 56.085180734   14.377 14.89     ~ 3 0
13 Cl* NGC 6752 PKD 35499 * 19 10 10.9192609249 -59 59 41.538605587           ~ 3 0
14 Cl* NGC 6752 PKD 35186 * 19 10 13.32 -60 00 03.3   14.204 14.443     ~ 2 0
15 Cl* NGC 6752 PKD 38504 * 19 10 15.3240343204 -59 55 41.619208774   14.668 14.80     ~ 5 0
16 Cl* NGC 6752 PKD 38087 * 19 10 18.1153171670 -59 56 23.889708511   15.993 17.190     ~ 4 0
17 Cl* NGC 6752 CL 158 * 19 10 18.8933303113 -59 58 28.749588873   14.75 14.83     ~ 7 0
18 Cl* NGC 6752 PKD 35662 * 19 10 22.1160376143 -59 59 30.297956958   14.444 15.010     ~ 3 0
19 Cl* NGC 6752 PKD 32470 * 19 10 22.1714448977 -59 55 54.370552164   14.41 14.681     ~ 2 0
20 Cl* NGC 6752 PKD 36480 * 19 10 23.0185350701 -59 58 30.348114444   15.871 16.899     ~ 3 0
21 Cl* NGC 6752 PKD 36242 * 19 10 23.0350516130 -59 58 47.176107580   14.454 15.024     ~ 3 0
22 Cl* NGC 6752 PKD 39008 * 19 10 25.0284127567 -59 54 41.770547604   15.959 17.178     ~ 3 0
23 Cl* NGC 6752 PKD 38095 * 19 10 26.6078558428 -59 56 23.295102856   14.658 15.33     ~ 4 0
24 Cl* NGC 6752 PKD 28695 * 19 10 35.1098921598 -59 55 08.725337714   14.174 14.32     ~ 3 0
25 Cl* NGC 6752 PKD 11609 * 19 10 36.0280179261 -60 00 28.155855123   14.698 15.311     ~ 3 0
26 Cl* NGC 6752 PKD 14727 * 19 10 39.624 -59 59 39.13   14.134 14.253     ~ 2 0
27 Cl* NGC 6752 PKD 14664 * 19 10 41.367 -59 59 39.90   14.058 13.972     ~ 2 0
28 Cl* NGC 6752 PKD 4964 * 19 10 49.893 -60 04 08.04   14.294 14.552     ~ 2 0
29 NGC 6752 GlC 19 10 52.11 -59 59 04.4   6.96 6.28     ~ 1835 0
30 Cl* NGC 6752 PKD 5455 * 19 10 52.7178732159 -60 03 36.880635146   16.224 17.371     ~ 3 0
31 Cl* NGC 6752 PKD 5487 * 19 10 57.5536291384 -60 03 35.054870261   15.831 16.766     ~ 3 0
32 Cl* NGC 6752 PKD 24849 * 19 10 59.399 -59 57 05.99   14.305 14.578     ~ 2 0
33 Cl* NGC 6752 PKD 26760 * 19 10 59.7815917054 -59 56 17.503427261   14.799 15.50     ~ 4 0
34 Cl* NGC 6752 PKD 28947 * 19 11 04.7055631754 -59 54 56.592541461   15.853 16.832     ~ 3 0
35 Cl* NGC 6752 PKD 17941 * 19 11 04.827 -59 58 02.02   15.254 15.928     ~ 2 0
36 Cl* NGC 6752 PKD 15395 * 19 11 05.9370062253 -59 59 29.513032823   16.184 17.337     ~ 3 0
37 NGC 6752 13 * 19 11 07.6992494349 -60 00 52.981559922   14.42 14.06     ~ 3 0
38 Cl* NGC 6752 PKD 28554 * 19 11 07.9391675998 -59 55 14.125060115   16.175 17.289     ~ 4 0
39 Cl* NGC 6752 PKD 28693 * 19 11 08.1270280852 -59 55 08.550885331   16.134 17.306     ~ 4 0
40 Cl* NGC 6752 PKD 5134 * 19 11 09.6303803773 -60 03 56.259839766   14.909 15.615     ~ 3 0
41 Cl* NGC 6752 PKD 20919 * 19 11 10.4958776524 -59 58 15.229919011   13.954 13.844     ~ 2 0
42 Cl* NGC 6752 PKD 15026 * 19 11 12.319 -59 59 34.51   13.976 14.018     ~ 2 0
43 Cl* NGC 6752 PKD 16551 * 19 11 14.2546156781 -59 59 13.864515588   14.757 15.420     ~ 3 0
44 Cl* NGC 6752 PKD 7843 * 19 11 14.678 -60 02 55.92   14.624 15.317     ~ 2 0
45 Cl* NGC 6752 CS 45 * 19 11 15.8778492910 -60 06 00.245563618   13.88 13.86 14.08   ~ 3 0
46 Cl* NGC 6752 PKD 11634 * 19 11 16.1067422140 -60 00 27.320687944   14.257 14.431     ~ 2 0
47 Cl* NGC 6752 PKD 18782 * 19 11 16.4345563621 -59 57 45.877985046   14.103 14.601     ~ 3 0
48 Cl* NGC 6752 PKD 20302 * 19 11 16.9322796962 -59 57 13.208339356   15.693 16.594     ~ 3 0
49 Cl* NGC 6752 PKD 27604 * 19 11 17.0421442076 -59 55 50.513075373   15.096 15.937     ~ 4 0
50 Cl* NGC 6752 PKD 28231 * 19 11 18.560 -59 55 27.51   16.276 17.367     ~ 2 0
51 Cl* NGC 6752 PKD 10625 * 19 11 21.0295007529 -60 00 45.419825029   16.4 17.701     ~ 4 0
52 Cl* NGC 6752 PKD 4672 * 19 11 21.5641397565 -60 04 31.494929046   16.058 17.181     ~ 3 0
53 Cl* NGC 6752 PKD 14944 * 19 11 22.4978520262 -59 59 35.517718841   14.73 15.37     ~ 3 0
54 Cl* NGC 6752 PKD 27181 * 19 11 24.2058475853 -59 56 04.060334483   14.412 15.073     ~ 3 0
55 Cl* NGC 6752 PKD 26756 * 19 11 25.7870583302 -59 56 17.055131389   14.334 14.599     ~ 2 0
56 Cl* NGC 6752 PKD 5201 * 19 11 26.7550747613 -60 03 51.843427953   16.434 17.615     ~ 4 0
57 Cl* NGC 6752 MMP 10711 * 19 11 28.17 -60 00 43.5   16.229 17.03     ~ 3 0
58 Cl* NGC 6752 CL 3781 HS* 19 11 29.7954016161 -60 02 54.934095695   16.89 17.13     sdB 7 0
59 Cl* NGC 6752 PKD 14770 * 19 11 32.5805043755 -59 59 37.626033994   16.055 17.247     ~ 3 0
60 Cl* NGC 6752 PKD 8672 * 19 11 32.6273137843 -60 01 30.843917150   16.524 17.790     ~ 3 0
61 HD 188112 HS* 19 54 31.4192112333 -28 20 20.679022097   10.01 10.22     sdB 82 0
62 Cl* NGC 6752 PKD 5865 * ~ ~   16.158 17.195     ~ 3 0
63 NAME Galactic Bulge reg ~ ~           ~ 3531 0

    Equat.    Gal    SGal    Ecl

To bookmark this query, right click on this link: simbad:objects in 2006A&A...451..499M and select 'bookmark this link' or equivalent in the popup menu


2021.02.25-21:13:49

© Université de Strasbourg/CNRS

    • Contact