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25 April 2024 |
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A New Accretion Disk Around the Missing Link Binary Pulsar PSR J1023+0038 | | A. Patruno
; A.M. Archibald
; J.W.T. Hessels
; S. Bogdanov
; B.W. Stappers
; C.G. Bassa
; G.H. Janssen
; V.M. Kaspi
; S. Tendulkar
; A.G. Lyne
; | | Date: |
28 Oct 2013 | | Abstract: | PSR J1023+0038 is an exceptional system for understanding how slowly rotating
neutron stars are spun up to millisecond rotational periods through accretion
from a companion star. Observed as a radio pulsar from 2007-2013, optical data
showed that the system had an accretion disk in 2001. Starting at the end of
2013 June, the radio pulsar has become undetectable, suggesting a return to the
previous accretion-disk state, where the system more closely resembles an X-ray
binary. In this Letter we report the first X-ray observations ever performed of
the active phase and complement them with UV/Optical and radio observations
collected in 2013 October. We find strong evidence that indeed an accretion
disk has recently formed in the system and we report the first observations of
fast X-ray changes spanning about two orders of magnitude in luminosity. No
radio pulsations are seen during low flux states in the X-ray light-curve or at
any other times. | | Source: | arXiv, 1310.7549 | | Services: | Forum | Review | PDF | Favorites | |
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