2016MNRAS.456...55G


C.D.S. - SIMBAD4 rel 1.7 - 2021.04.14CEST13:51:44

2016MNRAS.456...55G - Mon. Not. R. Astron. Soc., 456, 55-65 (2016/February-2)

Constraining the braking indices of magnetars.

GAO Z.F., LI X.-D., WANG N., YUAN J.P., WANG P., PENG Q.H. and DU Y.J.

Abstract (from CDS):

Because of the lack of long-term pulsed emission in quiescence and the strong timing noise, it is impossible to directly measure the braking index n of a magnetar. Based on the estimated ages of their potentially associated supernova remnants (SNRs), we estimate the values of the mean braking indices of eight magnetars with SNRs, and find that they cluster in the range of 1-42. Five magnetars have smaller mean braking indices of 1 < n < 3, and we interpret them within a combination of magneto-dipole radiation and wind-aided braking. The larger mean braking indices of n > 3 for the other three magnetars are attributed to the decay of external braking torque, which might be caused by magnetic field decay. We estimate the possible wind luminosities for the magnetars with 1 < n < 3, and the dipolar magnetic field decay rates for the magnetars with n > 3, within the updated magneto-thermal evolution models. Although the constrained range of the magnetars' braking indices is tentative, as a result of the uncertainties in the SNR ages due to distance uncertainties and the unknown conditions of the expanding shells, our method provides an effective way to constrain the magnetars' braking indices if the measurements of the SNR ages are reliable, which can be improved by future observations.

Abstract Copyright: © 2015 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society (2015)

Journal keyword(s): stars: magnetars - stars: magnetic field - stars: rotation - stars: winds, outflows - ISM: supernova remnants

CDS comments: HSS J1844-087 is a probable misprint for HESS J1834-087.

Simbad objects: 44

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Number of rows : 44

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 NAME Per Arm PoG 03 30 +45.0           ~ 1301 0
2 NAME Sgr J0418+5729 gam 04 18 33.867 +57 32 22.91           ~ 192 0
3 SNR G160.8+02.6 SNR 05 01 00.000 +46 40 00.00           ~ 195 0
4 2XMM J050106.5+451634 X 05 01 08.0 +45 16 31           ~ 110 0
5 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 15285 1
6 SNR J052559-660453 SNR 05 26 00.4 -66 05 02     12.71     ~ 413 2
7 PSR B0525-66 Psr 05 26 00.7 -66 04 35           ~ 524 1
8 V* CM Tau Psr 05 34 31.93830 +22 00 52.1758           ~ 4879 1
9 PSR J0537-6910 Psr 05 37 46.66 -69 10 17.1           ~ 238 1
10 PSR B0540-69 Psr 05 40 10.84 -69 19 54.2           ~ 811 3
11 NAME Vela Pulsar Psr 08 35 20.65525 -45 10 35.1545     15.10     ~ 2105 1
12 PSR J1119-6127 Psr 11 19 14.30 -61 27 49.5           ~ 349 1
13 PSR B1509-58 Psr 15 13 55.52 -59 08 08.8     13.06     ~ 805 1
14 PSR J1550-5418 Psr 15 50 54.18 -54 18 23.9           ~ 352 1
15 SNR G327.2-00.1 SNR 15 50 55 -54 18.0           ~ 61 1
16 PSR J1622-4950 Psr 16 22 44.80 -49 50 54.4           ~ 114 0
17 SNR G333.9+00.0 SR? 16 23 -49.7           ~ 10 0
18 SNR G337.0-00.1 SNR 16 35 06.9 -47 47 25           ~ 123 1
19 GRB 980618A gB 16 35 52 -47 35.2           ~ 243 0
20 SNR G348.7+00.3 SNR 17 13 43.0 -38 10 12           ~ 110 2
21 HESS J1713-381 gam 17 13 51.20353 -38 13 13.5700           ~ 29 1
22 SN 393 SN* 17 14 -39.8           ~ 38 1
23 [AAB2008] 1 X 17 14 05.758 -38 10 31.32           ~ 51 1
24 SNR G348.5+00.1 SNR 17 14 31.780 -38 28 34.50           ~ 200 3
25 PSR B1731-33.5 Psr 17 34 26.6 -33 33 22           ~ 84 1
26 PSR J1745-2900 Psr 17 45 40.1640 -29 00 29.818           ~ 245 0
27 PSR B1800-21 Psr 18 03 51.45 -21 37 08.1           ~ 237 1
28 PSR J1808-2024 Psr 18 08 39.32 -20 24 40.1           ~ 1138 2
29 AX J1809.8-1943 Psr 18 09 51.07 -19 43 51.8           ~ 385 0
30 PSR B1823-13 Psr 18 26 13.06 -13 34 48.1           ~ 363 1
31 SNR G021.5-00.9 SNR 18 33 33.612 -10 34 07.69           ~ 405 1
32 SNR G023.3-00.3 SNR 18 34 51.80 -08 44 38.2           ~ 195 0
33 SWIFT J1834.9-0846 N*? 18 34 52.768 -08 45 40.83           ~ 66 0
34 PSR J1841-0456 Psr 18 41 19.29 -04 56 11.4           ~ 239 1
35 4C -04.71 Rad 18 41 19.8 -04 56 06           ~ 306 3
36 SNR G029.6+00.1 Rad 18 44 52 -02 56.5           ~ 49 1
37 AX J1844.8-0258 HXB 18 44 53 -02 56.0           ~ 112 0
38 PSR J1846-0258 Psr 18 46 24.94 -02 58 30.1           ~ 310 2
39 GBS 1900+14 gB 19 07 13 +09 19.6           ~ 800 0
40 NAME Sgr 1935+2154 * 19 34 55.68 +21 53 48.2           ~ 208 1
41 SNR G057.2+00.8 SNR 19 35.0 +21 57           ~ 74 0
42 2E 4673 HXB 23 01 08.14 +58 52 44.5           ~ 597 1
43 SNR G109.1-01.0 SNR 23 01 35 +58 53.0           ~ 323 0
44 NAME Sgr 1E ? ~ ~           ~ 8 0

    Equat.    Gal    SGal    Ecl

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2021.04.14-13:51:44

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