Query : 2012A&A...544A.108P

2012A&A...544A.108P - Astronomy and Astrophysics, volume 544A, 108-108 (2012/8-1)

X-ray follow-up observations of the two γ-ray pulsars PSR J1459-6053 and PSR J1614-2230.


Abstract (from CDS):

We have observed two newly detected γ-ray pulsars, PSR J1459-6053 and PSR J1614-2230, in the X-ray domain with XMM-Newton to try to enlarge the sample of pulsars for which multi-wavelength data exist. We use these data with the aim of understanding the pulsar emission mechanisms of these pulsars. We analysed the X-ray spectra to determine whether the emission emanates from the neutron star surface (thermal emission) or from the magnetosphere (non-thermal emission) and compared this to the region in the magnetosphere in which the γ-ray emission is generated. Furthermore, we compared the phase-folded X-ray lightcurves with those in the γ-ray and, where possible, radio domains, to elicit additional information on the emission sites. J1459-6053 shows X-ray spectra that are best fitted with a power law model with a photon index Γ=2.10+1.24–0.85. The γ-ray data suggest that either the slot gap or the outer gap model may be best to describe the emission from this pulsar. Analysis of the X-ray lightcurve folded on the γ-ray ephemeris shows modulation at the 3.7σ level in the 1.0-4.5keV domain. Possible alignment of the main γ-ray and X-ray peaks also supports the interpretation that the emission in the two energy domains emanates from similar regions. The millisecond pulsar J1614-2230 exhibits an X-ray spectrum with a substantial thermal component, where the best-fitting spectral model is either two blackbodies, with kT=0.15+0.04–0.04 and 0.88+2.54–0.54keV or a blackbody with similar temperature to the previous cooler component, kT=0.13+0.04–0.02keV and a power law component with a photon index Γ=1.25+2.30–1.75. The cooler blackbody component is likely to originate from the hot surface at the polar cap. Analysis of the X-ray lightcurve folded on the radio ephemeris shows modulation at the 4.0σ level in the 0.4-3.0keV domain.

Abstract Copyright:

Journal keyword(s): X-rays: stars - pulsars: individual: PSR J1459-6053 - radiation mechanisms: thermal - stars: neutron - mechanisms: non-thermal radiation - pulsars: individual: PSR J1614-2230

Simbad objects: 6

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Number of rows : 6
N Identifier Otype ICRS (J2000)
ICRS (J2000)
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2024
1 PSR J0030+0451 Psr 00 30 27.4277 +04 51 39.710           ~ 433 1
2 PSR J0437-47 Psr 04 37 15.7994581776 -47 15 08.544351636           DC 884 0
3 PSR J1459-60 Psr 14 59 30.1228633008 -60 53 20.536602864           ~ 51 0
4 PSR J1614-2230 Psr 16 14 36.5070 -22 30 31.207           ~ 380 1
5 PSR B1706-44 Psr 17 09 42.7460 -44 29 07.200     13.30     ~ 634 1
6 PSR J2124-3358 Psr 21 24 43.8464 -33 58 44.961           ~ 289 1

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