Evidence for a parsec scale X-ray jet from the accreting neutron star Circinus X-1

Details Evidence for a parsec scale X-ray jet from the accreting neutron star Circinus X-1 Evidence for a parsec scale X-ray jet from the accreting neutron star Circinus X-1

2007-06-26

arxiv.org/abs/0706.3881v2

Astronomy and Astrophysics

Astrophysics

Added journal reference, corrected on reference and typo in labels for Fig. 1; 5 pages, 3 figures, ApJ Letter, in press

Scientific paper

10.1086/519950

We analyzed the zero-order image of a 50 ks Chandra gratings observation of Circinus X-1, taken in 2005 during the source's low-flux state. Circinus X-1 is an accreting neutron star that exhibits ultra-relativistic arcsecond-scale radio jets and diffuse arcminute-scale radio jets and lobes. The image shows a clear excess along the general direction of the north-western counter-jet, coincident with the radio emission, suggesting that it originates either in the jet itself or in the shock the jet is driving into its environment. This makes Circinus X-1 the first neutron star for which an extended X-ray jet has been detected. The kinetic jet power we infer is significantly larger than the minimum power required for the jet to inflate the large scale radio nebula.

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