2004A&A...419..533B


Query : 2004A&A...419..533B

2004A&A...419..533B - Astronomy and Astrophysics, volume 419, 533-541 (2004/5-4)

Palomar 13: A velocity dispersion inflated by binaries?

BLECHA A., MEYLAN G., NORTH P. and ROYER F.

Abstract (from CDS):

Recently, combining radial velocities from Keck/HIRES echelle spectra with published proper motion membership probabilities, Cote et al. (2002ApJ...574..783C) observed a sample of 21 stars, probable members of Palomar 13, a globular cluster in the Galactic halo. Their projected velocity dispersion σp=2.2±0.4km/s gives a mass-to-light ratio M/LV=40+24–17, about one order of magnitude larger than the usual estimate for globular clusters. We present here radial velocities measured from three different CCD frames of commissioning observations obtained with the new ESO/VLT instrument FLAMES (Fibre Large Array Multi Element Spectrograph). From these data, now publicly available, we measure the homogeneous radial velocities of eight probable members of this globular cluster. A new projected velocity dispersion σp=0.6-0.9±0.3km/s implies Palomar 13 mass-to-light ratio M/LV=3-7, similar to the usual value for globular clusters. We discuss briefly the two most obvious reasons for the previous unusual mass-to-light ratio finding: binaries, now clearly detected, and more homogeneous data from the multi-fibre FLAMES spectrograph.

Abstract Copyright:

Journal keyword(s): Galaxy: globular clusters: individual: Palomar 13 - techniques: radial velocities - stars: kinematics - stars: population II

VizieR on-line data: <Available at CDS (J/A+A/419/533): table2.dat table3.dat>

CDS comments: Table 2, 1rst column : the second ID (Keck) is written Cl* Palomar 13 ORS NNN in Simbad.

Simbad objects: 47

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Number of rows : 47
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2022
#notes
1 Cl* Palomar 13 SMC 195 * 23 06 20.8417230000 +12 45 39.747849732     19.85     ~ 2 0
2 Cl* Palomar 13 SMC 101 * 23 06 20.94 +12 49 53.7     19.13     ~ 2 0
3 Cl* Palomar 13 SMC 78 * 23 06 23.4455518776 +12 44 14.924324616     18.66     ~ 2 0
4 Cl* Palomar 13 SMC 85 * 23 06 26.3414173776 +12 49 53.460023988     18.80     ~ 2 0
5 Cl* Palomar 13 SMC 56 * 23 06 28.2637251168 +12 41 14.682632460     18.21     ~ 2 0
6 Cl* Palomar 13 SMC 148 * 23 06 28.57 +12 43 30.3     19.86     ~ 2 0
7 Cl* Palomar 13 SMC 127 * 23 06 31.2904809552 +12 43 36.506961696     19.30     ~ 2 0
8 Cl* Palomar 13 SMC 217 * 23 06 32.1669071088 +12 44 03.359207040     19.97     ~ 3 0
9 Cl* Palomar 13 SMC 51 * 23 06 32.2038392592 +12 44 29.727016188     18.12     ~ 3 0
10 Cl* Palomar 13 SMC 177 * 23 06 33.02 +12 45 47.7     19.61     ~ 2 0
11 Cl* Palomar 13 SMC 198 * 23 06 34.7757333960 +12 44 56.522983956     19.91     ~ 3 0
12 Cl* Palomar 13 SMC 26 * 23 06 35.8608885624 +12 46 55.300548432   18.04 17.04     ~ 4 0
13 Cl* Palomar 13 SMC 22 * 23 06 37.3031027376 +12 49 27.036103800     16.90     ~ 3 0
14 Cl* Palomar 13 CDM 910 RG* 23 06 39.3698627280 +12 47 35.216150352   20.01 19.28     ~ 6 0
15 Cl* Palomar 13 ORS 1 * 23 06 40.1707678344 +12 44 00.691756548   19.41 18.59     ~ 4 0
16 Cl* Palomar 13 SMC 29 * 23 06 41.4522435024 +12 49 28.287002136     17.33     ~ 3 0
17 Cl* Palomar 13 SMC 38 RR* 23 06 41.5447291368 +12 46 58.462616388   18.33 17.53     ~ 8 0
18 Cl* Palomar 13 CDM 30 RG* 23 06 43.8197671296 +12 45 36.049666968   19.73 18.98     ~ 7 0
19 Cl* Palomar 13 SMC 23 * 23 06 43.9205956800 +12 42 06.350566860     16.97     ~ 3 0
20 Cl* Palomar 13 ORS 101 * 23 06 43.9857410376 +12 46 53.497209540   19.14 18.29     ~ 5 0
21 Cl* Palomar 13 CDM 29 * 23 06 44.3004097032 +12 45 49.005978696   19.38 19.02     ~ 4 0
22 GCl 124 GlC 23 06 44.48 +12 46 19.2   15.6       ~ 256 1
23 Cl* Palomar 13 SMC 3669 PM* 23 06 44.7432777696 +12 47 12.266890332     19.91     ~ 3 0
24 Cl* Palomar 13 SMC 21 * 23 06 45.5030453880 +12 49 53.193208944     16.91     ~ 2 0
25 Cl* Palomar 13 ORS 23 * 23 06 45.58 +12 45 01.1   20.99 19.49     ~ 3 0
26 Cl* Palomar 13 CSB 15 RG* 23 06 45.7586231544 +12 46 40.973426760   20.51 19.80     ~ 6 0
27 Cl* Palomar 13 SMC 60 * 23 06 47.7666832008 +12 49 37.887272832     18.44     ~ 3 0
28 Cl* Palomar 13 ORS 6 * 23 06 47.8884396840 +12 44 22.679409912   18.13 17.03     ~ 4 0
29 Cl* Palomar 13 ORS 41 RG* 23 06 48.2784994152 +12 45 46.486063332   19.35 18.59     ~ 6 0
30 2MASS J23064851+1246189 RG* 23 06 48.5174235672 +12 46 19.085841660   18.49 17.64     ~ 6 0
31 Cl* Palomar 13 SMC 36 RR* 23 06 48.8548564608 +12 41 22.798930524   17.99 17.67     ~ 10 0
32 Cl* Palomar 13 ORS 13 * 23 06 48.9745777824 +12 44 45.443551956   17.44 16.55     ~ 4 0
33 Cl* Palomar 13 CDM 45 * 23 06 49.5100966176 +12 44 20.517483948     19.71     ~ 4 0
34 Cl* Palomar 13 ORS 31 * 23 06 49.9487811960 +12 45 27.862160688   18.59 17.76     ~ 5 0
35 2MASS J23065009+1247139 RG* 23 06 50.1000150120 +12 47 14.024117292   17.93 17.00     ~ 6 0
36 Cl* Palomar 13 SMC 53 * 23 06 52.58 +12 41 28.9     18.14     ~ 2 0
37 Cl* Palomar 13 SMC 243 * 23 06 54.77 +12 49 48.3     20.14     ~ 2 0
38 Cl* Palomar 13 SMC 40 * 23 06 56.24 +12 46 17.6     17.27     ~ 2 0
39 Cl* Palomar 13 SMC 75 * 23 06 56.2475751336 +12 47 57.027596784     18.64     ~ 2 0
40 Cl* Palomar 13 SMC 47 * 23 06 56.8444854888 +12 47 39.057279432     17.90     ~ 2 0
41 Cl* Palomar 13 SMC 238 * 23 06 58.4181389496 +12 42 28.039316436     20.08     ~ 3 0
42 Cl* Palomar 13 SMC 111 * 23 06 59.5896964992 +12 43 24.183064452     19.14     ~ 2 0
43 Cl* Palomar 13 SMC 87 * 23 07 00.5194318368 +12 48 36.564924528     18.85     ~ 2 0
44 Cl* Palomar 13 SMC 262 * 23 07 02.25 +12 42 14.3     20.17     ~ 2 0
45 Cl* Palomar 13 SMC 175 * 23 07 03.31 +12 44 49.0     19.47     ~ 2 0
46 Cl* Palomar 13 SMC 97 * 23 07 03.5703756288 +12 43 58.779778908     19.14     ~ 3 0
47 Cl* Palomar 13 SMC 158 * 23 07 03.9272385048 +12 47 57.939659736     19.53     ~ 3 0

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2022.10.07-18:16:42

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