2002ApJ...570L..89D

Query : 2002ApJ...570L..89D

2002ApJ...570L..89D - Astrophys. J., 570, L89-L92 (2002/May-2)

Timing of millisecond pulsars in NGC 6752: evidence for a high Mass-to-Light ratio in the cluster core.

D'AMICO N., POSSENTI A., FICI L., MANCHESTER R.N., LYNE A.G., CAMILO F. and SARKISSIAN J.

Abstract (from CDS):

Using pulse timing observations, we have obtained precise parameters, including positions with ∼20 mas accuracy, of five millisecond pulsars in NGC 6752. Three of them, located relatively close to the cluster center, have line-of-sight accelerations larger than the maximum value predicted by the central mass density derived from optical observation, providing dynamical evidence for a central mass-to-light ratio ≳10, much higher than for any other globular cluster. It is likely that the other two millisecond pulsars have been ejected out of the core to their present locations at 1.4 and 3.3 half-mass radii, respectively, suggesting unusual nonthermal dynamics in the cluster core.

Abstract Copyright: ∼

Journal keyword(s): Galaxy: Globular Clusters: Individual: NGC Number: NGC 6752 - Stars: Pulsars: Individual: Alphanumeric: PSR J1910-5959B - Stars: Pulsars: Individual: Alphanumeric: PSR J1910-5959D - pulsars: individual (PSR J1910-5959E) - Stars: Pulsars: Individual: Alphanumeric: PSR J1911-5958A - pulsars: individual (PSR J1911-6000C)

Nomenclature: Fig.1, Table 1: [DPF2002b] Psr A (Nos A-E).

Simbad objects: 14

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Number of rows : 14
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 6397 GlC 17 40 42.09 -53 40 27.6     5.17     ~ 2103 0
3 PSR J1820-30A Psr 18 23 40.4842 -30 21 39.920           ~ 168 1
4 NGC 6624 GlC 18 23 40.51 -30 21 39.7           ~ 939 1
5 PSR J1824-2452A Psr 18 24 32.009 -24 52 11.10           ~ 529 2
6 M 28 GlC 18 24 32.89 -24 52 11.4           ~ 821 0
7 PSR J1910-5959B Psr 19 10 52.0556 -59 59 00.861           ~ 20 0
8 NGC 6752 GlC 19 10 52.11 -59 59 04.4           ~ 2121 0
9 PSR J1910-5959E Psr 19 10 52.1572 -59 59 02.087           ~ 19 0
10 PSR J1910-5959D Psr 19 10 52.4163 -59 59 05.479           ~ 20 0
11 PSR B1907-60C Psr 19 11 05.5561 -60 00 59.680           ~ 33 0
12 PSR J1910-5959A Psr 19 11 42.7562 -59 58 26.900 22.02 22.13 22.03     DA5 99 1
13 M 15 GlC 21 29 58.33 +12 10 01.2           ~ 3274 0
14 PSR J2129+1209C Psr 21 30 01.2030 +12 10 38.159           ~ 215 2

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