SIMBAD references

2016A&A...594A..31C - Astronomy and Astrophysics, volume 594A, 31-31 (2016/10-1)

A physical scenario for the high and low X-ray luminosity states in the transitional pulsar PSR J1023+0038.

CAMPANA S., COTI ZELATI F., PAPITTO A., REA N., TORRES D.F., BAGLIO M.C. and D'AVANZO P.

Abstract (from CDS):

The binary system PSR J1023+0038 (J1023) hosts a neutron star and a low-mass companion. J1023 is the best studied transitional pulsar, alternating a faint eclipsing millisecond radio pulsar state to a brighter X-ray active state. At variance with other low-mass X-ray binaries, this active state reaches luminosities of only ∼1034erg/s, showing strong, fast variability. In the active state, J1023 displays: i) a high state (LX∼7x1033erg/s, 0.3-80keV) occurring ∼80% of the time and during which X-ray pulsations at the neutron star spin period are detected (pulsed fraction ∼8%); ii) a low state (LX∼1033erg/s) during which pulsations are not detected (≤3%); and iii) a flaring state during which sporadic flares occur in excess of ∼1034erg/s, with no pulsation too. The transition between the high and the low states is very rapid, on a ∼10s timescale. Here we propose a plausible physical interpretation of the high and low states based on the (fast) transition among the propeller state and the radio pulsar state. We modelled the XMM-Newton spectra of the high, low and radio pulsar states, and found a good agreement with this physical picture.

Abstract Copyright: © ESO, 2016

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

Simbad objects: 4

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2021.06.16-05:00:40

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