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Title: Rapid variability of the arcsec-scale X-ray jets of SS 433
Author: Migliari, Simone
Fender, R. P.
Blundell, K. N.
Méndez, M.
Van der Klis, M.
Keywords: Astronomia de raigs X
Jets (Astrofísica)
Estels binaris de raigs X
X-ray astronomy
Astrophysical jets
X-ray binaries
Radio astronomy
Issue Date: Jan-2005
Publisher: Royal Astronomical Society
Abstract: We present X-ray images of all the available Chandra observations of the galactic jet source SS 433. We have studied the morphology of the X-ray images and inspected the evolution of the arcsec X-ray jets, recently found to be manifestations of in situ reheating of the relativistic gas downstream in the jets. The Chandra images reveal that the arcsec X-ray jets are not steady long-term structures; the structure varies, indicating that the reheating processes have no preference for a particular precession phase or distance from the binary core. Three observations made within about five days in 2001 May, and a 60-ks observation made in 2003 July, show that the variability of the jets can be very rapid, from time-scales of days to (possibly) hours. The three 2001 May images show two resolved knots in the east jet getting brighter one after the other, suggesting that a common phenomenon might be at the origin of the sequential reheatings of the knots. We discuss possible scenarios and propose a model to interpret these brightenings in terms of a propagating shock wave, revealing a second, faster outflow in the jet.
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It is part of: Monthly Notices of the Royal Astronomical Society, 2005, vol. 358, num. 3, p. 860-868
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ISSN: 0035-8711
Appears in Collections:Articles publicats en revistes (Física Quàntica i Astrofísica)

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