2002ApJ...574..873M


C.D.S. - SIMBAD4 rel 1.7 - 2021.04.16CEST14:36:35

2002ApJ...574..873M - Astrophys. J., 574, 873-878 (2002/August-1)

BeppoSAX observations of the young pulsar in the Kes 75 supernova remnant.

MEREGHETTI S., BANDIERA R., BOCCHINO F. and ISRAEL G.L.

Abstract (from CDS):

We present the results of BeppoSAX observations of the young X-ray pulsar PSR J1846-0258, recently discovered at the center of the composite supernova remnant Kes 75. The pulsar (plus nebula) spectrum can be fitted by an absorbed power law with photon index αph=2.16±0.15, NH=(4.7±0.8)x1022 cm–2, and unabsorbed flux ∼3.9x10–11 ergs.cm–2.s–1 (2-10 keV). By joining two observations taken at an interval of 2 weeks, we have been able to obtain a precise measurement of the spin period (P=324.818968±0.000006 ms). This value, when combined with previous measurements, cannot be fitted by a smooth frequency evolution with a canonical braking index n=3. With the hypothesis of no glitches and/or significant timing noise, the braking index would be n=1.86±0.08, and assuming a short initial period, the pulsar age would be ∼1700 yr, closer to that of the supernova remnant than the simple estimate τ=P/2P{dot}=723 yr. Other likely possibilities involve the presence of glitches and lead to a wide range of acceptable ages. For example, we obtain n in the range 1.8-2.5 if a glitch occurred near MJD 51500, while for a glitch between 1993 October and 1999 March, we can only get a lower limit of n>1.89.

Abstract Copyright:

Journal keyword(s): Stars: Pulsars: Individual: Alphanumeric: PSR J1846-0258 - Stars: Neutron - Stars: Supernovae: Individual: Alphanumeric: G29.7-0.3

Simbad objects: 11

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Number of rows : 11

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 V* CM Tau Psr 05 34 31.93830 +22 00 52.1758           ~ 4881 1
2 M 1 SNR 05 34 31.94 +22 00 52.2           ~ 5724 4
3 PSR B0540-69 Psr 05 40 10.84 -69 19 54.2           ~ 811 3
4 NAME Vela Pulsar Psr 08 35 20.65525 -45 10 35.1545     15.10     ~ 2105 1
5 PSR J1119-6127 Psr 11 19 14.30 -61 27 49.5           ~ 349 1
6 PSR B1509-58 Psr 15 13 55.52 -59 08 08.8     13.06     ~ 805 1
7 PSR B1737-30.2 Psr 17 40 33.82 -30 15 43.5           ~ 188 0
8 AX J1844.8-0258 HXB 18 44 53 -02 56.0           ~ 112 0
9 AX J1846.4-0258 Psr 18 46 24.5 -02 58 28           ~ 22 0
10 PSR J1846-0258 Psr 18 46 24.94 -02 58 30.1           ~ 310 2
11 SNR G029.7-00.2 SNR 18 46 25.5 -02 59 14           ~ 304 2

    Equat.    Gal    SGal    Ecl

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2021.04.16-14:36:35

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