2002ApJ...578..325P


C.D.S. - SIMBAD4 rel 1.7 - 2021.04.14CEST13:47:53

2002ApJ...578..325P - Astrophys. J., 578, 325-329 (2002/October-2)

Implications of the narrow period distribution of anomalous X-ray pulsars and soft gamma-ray repeaters.

PSALTIS D. and MILLER M.C.

Abstract (from CDS):

The spin periods of 10 observed anomalous X-ray pulsars and soft gamma-ray repeaters lie in the very narrow range of 6-12 s. We use a point-likelihood technique to show that the observed period clustering is not simply a statistical fluctuation, and we quantify the constraints it imposes on the birth period and on the final period of such systems. We consider a general law for their spin evolution described by a constant braking index. We find that, for positive values of the braking index, the observed clustering requires an upper cutoff period that is very close to the maximum observed period of ≃12 s. We also show that the constraint on the birth period depends very strongly on the assumed value of the braking index n, ranging from a few milliseconds for n≳2 to a few seconds for n≲2. We discuss possible ways of tightening these constraints based on similarities with the population of radio pulsars and by future observations of such sources with current X-ray observatories.

Abstract Copyright:

Journal keyword(s): Stars: Pulsars: General - Stars: Neutron - X-Rays: Stars

Simbad objects: 15

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Number of rows : 15

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 PSR J0146+6145 Psr 01 46 22.21 +61 45 03.8   28.100 25.620     ~ 518 0
2 PSR B0525-66 Psr 05 26 00.7 -66 04 35           ~ 524 1
3 PSR B0540-69 Psr 05 40 10.84 -69 19 54.2           ~ 811 3
4 2E 2336 HXB 10 50 08.93 -59 53 19.9           Be 385 0
5 PSR B1509-58 Psr 15 13 55.52 -59 08 08.8     13.06     ~ 805 1
6 GRB 980618A gB 16 35 52 -47 35.2           ~ 243 0
7 PSR J1708-4008 Psr 17 08 49.0 -40 09 10           ~ 269 0
8 PSR J1808-2024 Psr 18 08 39.32 -20 24 40.1           ~ 1138 2
9 4C -04.71 Rad 18 41 19.8 -04 56 06           ~ 306 3
10 SNR G029.6+00.1 Rad 18 44 52 -02 56.5           ~ 49 1
11 AX J1844.8-0258 HXB 18 44 53 -02 56.0           ~ 112 0
12 SNR G029.7-00.2 SNR 18 46 25.5 -02 59 14           ~ 304 2
13 GBS 1900+14 gB 19 07 13 +09 19.6           ~ 800 0
14 2E 4673 HXB 23 01 08.14 +58 52 44.5           ~ 597 1
15 SNR G109.1-01.0 SNR 23 01 35 +58 53.0           ~ 323 0

    Equat.    Gal    SGal    Ecl

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2021.04.14-13:47:53

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