2003A&A...406..667C

Query : 2003A&A...406..667C

2003A&A...406..667C - Astronomy and Astrophysics, volume 406667-671 (2003/8-1)

On the statistical implication of timing noise for pulsar braking index.

CHUKWUDE A.E.

Abstract (from CDS):

Timing data on 27 radio pulsars spanning more than 13 years were analysed in order to investigate the correlations of radio pulsar timing noise (random fluctuations in the observed pulse phase - RPTN), with the observed electromagnetic torque braking index (nobs). The results reveal significant correlations (r≥90%) between the statistics used to parameterize RPTN and the absolute magnitude of the observed second time derivative of the pulse (rotation) frequency ({dotdot}(ν)obs). These correlations, most plausibly, suggest that the observed braking indices of most pulsars, obtained through the traditional phase-connected method, are strongly dominated by intrinsic variability in their spin rates. The implication of this result for a significant measurement of pulsar systematic frequency second derivative is discussed.

Abstract Copyright: ∼

Journal keyword(s): methods: statistical - stars: neutron - pulsars: general

Simbad objects: 27

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Number of rows : 27
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 PSR B0450-18 Psr 04 52 34.11900 -17 59 23.1500           ~ 203 1
2 PSR B0736-40 Psr 07 38 32.2620 -40 42 39.420           ~ 212 0
3 PSR B0740-28 Psr 07 42 49.0730 -28 22 43.510           ~ 445 0
4 PSR B0835-41 Psr 08 37 21.1943 -41 35 14.563     12.69     ~ 149 0
5 PSR B0959-54 Psr 10 01 37.85000 -55 07 07.8000           ~ 113 0
6 PSR B1054-62 Psr 10 56 25.5840 -62 58 47.690           ~ 94 0
7 PSR B1133+16 Psr 11 36 03.09460 +15 51 15.9000           ~ 715 0
8 PSR B1221-63 Psr 12 24 22.2740 -64 07 53.834           ~ 122 0
9 PSR B1240-64 Psr 12 43 17.2912183824 -64 23 23.082548820           ~ 119 0
10 PSR B1323-58 Psr 13 26 58.2170 -58 59 29.290           ~ 82 0
11 PSR B1323-62 Psr 13 27 17.1760 -62 22 45.460           ~ 100 0
12 PSR B1356-60 Psr 13 59 58.2480 -60 38 07.550           ~ 131 0
13 PSR B1358-63 Psr 14 01 52.45000 -63 57 42.0000           ~ 83 0
14 PSR B1426-66 Psr 14 30 40.73200 -66 23 05.5460           ~ 102 0
15 PSR B1449-64 Psr 14 53 32.6546 -64 13 16.047           ~ 158 0
16 PSR B1451-68 Psr 14 56 00.0175876848 -68 43 40.034742348           ~ 203 0
17 PSR B1556-44 Psr 15 59 41.5290 -44 38 45.740           ~ 140 0
18 PSR B1557-50 Psr 16 00 53.0150 -50 44 21.300           ~ 119 0
19 PSR B1641-45 Psr 16 44 49.28482 -45 59 09.6360     12.60     ~ 217 0
20 PSR B1642-03 Psr 16 45 02.0330 -03 17 57.200           ~ 394 0
21 PSR B1706-16 Psr 17 09 26.45200 -16 40 59.2000           ~ 247 0
22 PSR B1727-47 Psr 17 31 42.21000 -47 44 38.7000           ~ 166 0
23 PSR B1749-28 Psr 17 52 58.70700 -28 06 36.0000           ~ 277 1
24 PSR B1822-09 Psr 18 25 30.62000 -09 35 22.0000           ~ 382 0
25 PSR B1929+10 Psr 19 32 14.0570 +10 59 33.380           ~ 801 0
26 PSR B1933+16 Psr 19 35 47.7011639352 +16 16 40.034899524           ~ 328 1
27 PSR B2045-16 Psr 20 48 35.74000 -16 16 45.0000           ~ 344 0

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