2019A&A...627A.141W


Query : 2019A&A...627A.141W

2019A&A...627A.141W - Astronomy and Astrophysics, volume 627A, 141-141 (2019/7-2)

Thermal X-ray emission identified from the millisecond pulsar PSR J1909-3744.

WEBB N.A., LEAHY D., GUILLOT S., BAILLOT D'ETIVAUX N., BARRET D., GUILLEMOT L., MARGUERON J. and MILLER M.C.

Abstract (from CDS):

Context. Pulsating thermal X-ray emission from millisecond pulsars can be used to obtain constraints on the neutron star equation of state, but to date only five such sources have been identified. Of these five millisecond pulsars, only two have well-constrained neutron star masses, which improve the determination of the radius via modelling of the X-ray waveform. Aims. We aim to find other millisecond pulsars that already have well-constrained mass and distance measurements that show pulsed thermal X-ray emission in order to obtain tight constraints on the neutron star equation of state. Methods. The millisecond pulsar PSR J1909-3744 has an accurately determined mass, M=1.54±0.03M (1σ error) and distance, D=1.07±0.04kpc. We analysed XMM-Newton data of this 2.95ms pulsar to identify the nature of the X-ray emission. Results. We show that the X-ray emission from PSR J1909-3744 appears to be dominated by thermal emission from the polar cap. Only a single component model is required to fit the data. The black-body temperature of this emission is kT=0.260.020.03keV and we find a 0.2-10keV un-absorbed flux of 1.1x10–14erg/cm2/s or an un-absorbed luminosity of 1.5x1030erg/s. Conclusion. Thanks to the previously determined mass and distance constraints of the neutron star PSR J1909-3744, and its predominantly thermal emission, deep observations of this object with future X-ray facilities should provide useful constraints on the neutron star equation of state.

Abstract Copyright: © N. A. Webb et al. 2019

Journal keyword(s): stars: neutron - dense matter - equation of state - X-rays: individuals: PSR J1909-3744

Simbad objects: 9

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Number of rows : 9
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2024
#notes
1 NGC 104 GlC 00 24 05.359 -72 04 53.20     4.09     ~ 3936 0
2 PSR J0030+0451 Psr 00 30 27.4277 +04 51 39.710           ~ 476 1
3 PSR J0437-47 Psr 04 37 15.7994581776 -47 15 08.544351636           DC 912 0
4 PSR J1025-07 Psr 10 24 38.6991893112 -07 19 19.045523388     19.81 18.78 18.00 ~ 246 1
5 PSR J1614-2230 Psr 16 14 36.5070 -22 30 31.207           ~ 400 1
6 PSR J1756-2251 Psr 17 56 46.63 -22 51 59.4           ~ 135 1
7 PSR J1909-3744 Psr 19 09 47.42820 -37 44 14.7740           ~ 289 2
8 PSR J1915+1606 Psr 19 15 27.99999 +16 06 27.4034     22.5     ~ 995 1
9 PSR J2124-3358 Psr 21 24 43.8464 -33 58 44.961           ~ 302 1

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