2015ApJ...806..148B


Query : 2015ApJ...806..148B

2015ApJ...806..148B - Astrophys. J., 806, 148 (2015/June-3)

Coordinated X-ray, ultraviolet, optical, and radio observations of the PSR J1023+0038 system in a low-mass X-ray binary state.

BOGDANOV S., ARCHIBALD A.M., BASSA C., DELLER A.T., HALPERN J.P., HEALD G., HESSELS J.W.T., JANSSEN G.H., LYNE A.G., MOLDON J., PARAGI Z., PATRUNO A., PERERA B.B.P., STAPPERS B.W., TENDULKAR S.P., D'ANGELO C.R. and WIJNANDS R.

Abstract (from CDS):

The PSR J1023+0038 binary system hosts a neutron star and a low-mass, main-sequence-like star. It switches on year timescales between states as an eclipsing radio millisecond pulsar and a low-mass X-ray binary (LMXB). We present a multi-wavelength observational campaign of PSR J1023+0038 in its most recent LMXB state. Two long XMM-Newton observations reveal that the system spends ∼70% of the time in a ≈3x1033 erg/s X-ray luminosity mode, which, as shown in Archibald et al., exhibits coherent X-ray pulsations. This emission is interspersed with frequent lower flux mode intervals with ≈ 5 x 1032 erg/s and sporadic flares reaching up to ≈1034 erg/s, with neither mode showing significant X-ray pulsations. The switches between the three flux modes occur on timescales of order 10 s. In the UV and optical, we observe occasional intense flares coincident with those observed in X-rays. Our radio timing observations reveal no pulsations at the pulsar period during any of the three X-ray modes, presumably due to complete quenching of the radio emission mechanism by the accretion flow. Radio imaging detects highly variable, flat-spectrum continuum radiation from PSR J1023+0038, consistent with an origin in a weak jet-like outflow. Our concurrent X-ray and radio continuum data sets do not exhibit any correlated behavior. The observational evidence we present bears qualitative resemblance to the behavior predicted by some existing ''propeller'' and ''trapped'' disk accretion models although none can account for key aspects of the rich phenomenology of this system.

Abstract Copyright:

Journal keyword(s): pulsars: general - pulsars: individual: PSR J1023+0038 - stars: neutron - X-rays: binaries

Simbad objects: 6

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Number of rows : 6
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 V* V822 Cen LXB 14 58 21.9350279092 -31 40 07.515505032 11.95 12.85 12.8     K3-K7V 518 0
4 V* V4580 Sgr LXB 18 08 27.54 -36 58 44.3   16.81 16.51     ~ 898 0
5 IGR J18245-2452 LXB 18 24 32.50 -24 52 07.8           ~ 190 0
6 M 28 GlC 18 24 32.89 -24 52 11.4           ~ 692 0

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2021.08.06-05:30:36

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