2014ApJ...797..111L


Query : 2014ApJ...797..111L

2014ApJ...797..111L - Astrophys. J., 797, 111 (2014/December-3)

NuSTAR observations and broadband spectral energy distribution modeling of the millisecond pulsar binary PSR J1023+0038.

LI K.L., KONG A.K.H., TAKATA J., CHENG K.S., TAM P.H.T., HUI C.Y. and JIN R.

Abstract (from CDS):

We report the first hard X-ray (3-79 keV) observations of the millisecond pulsar (MSP) binary PSR J1023+0038 using NuSTAR. This system has been shown transiting between a low-mass X-ray binary (LMXB) state and a rotation-powered MSP state. The NuSTAR observations were taken in both LMXB state and rotation-powered state. The source is clearly seen in both states up to ∼79 keV. During the LMXB state, the 3-79 keV flux is about a factor of 10 higher than in the rotation-powered state. The hard X-rays show clear orbital modulation during the X-ray faint rotation-powered state but the X-ray orbital period is not detected in the X-ray bright LMXB state. In addition, the X-ray spectrum changes from a flat power-law spectrum during the rotation-powered state to a steeper power-law spectrum in the LMXB state. We suggest that the hard X-rays are due to the intrabinary shock from the interaction between the pulsar wind and the injected material from the low-mass companion star. During the rotation-powered MSP state, the X-ray orbital modulation is due to Doppler boosting of the shocked pulsar wind. At the LMXB state, the evaporating matter of the accretion disk due to the gamma-ray irradiation from the pulsar stops almost all the pulsar wind, resulting in the disappearance of the X-ray orbital modulation.

Abstract Copyright:

Journal keyword(s): accretion, accretion disks - binaries: close - pulsars: individual: PSR J1023+0038 - X-rays: binaries

Simbad objects: 3

goto Full paper

goto View the references in ADS

Number of rows : 3
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 PSR J1023+0038 LXB 10 23 47.6840307966 +00 38 41.006983532     17.31     GV 332 0
2 XSS J12270-4859 LXB 12 27 58.7475950389 -48 53 42.826034125           ~ 218 0
3 IGR J18245-2452 LXB 18 24 32.50 -24 52 07.8           ~ 190 0

To bookmark this query, right click on this link: simbad:objects in 2014ApJ...797..111L and select 'bookmark this link' or equivalent in the popup menu


2021.08.06-06:00:54

© Université de Strasbourg/CNRS

    • Contact