Large-Scale, Decelerating, Relativistic X-ray Jets from the Microquasar XTE J1550-564

Author:

Corbel S.1,Fender R. P.2,Tzioumis A. K.3,Tomsick J. A.4,Orosz J. A.5,Miller J. M.6,Wijnands R.6,Kaaret P.7

Affiliation:

1. Université Paris VII and Service d'Astrophysique, Commissariat à l'Energie Atomique CE-Saclay, 91191 Gif sur Yvette, France.

2. Astronomical Institute Anton Pannekoek, University of Amsterdam, and Center for High Energy Astrophysics, Kruislaan 403, 1098 SJ Amsterdam, Netherlands.

3. Australia Telescope National Facility, Commonwealth Scientific and Industrial Research Organization (CSIRO), Post Office Box 76, Epping NSW 1710, Australia.

4. Center for Astrophysics and Space Sciences, University of California at San Diego, MS 0424, La Jolla, CA 92093, USA.

5. Astronomical Institute, Utrecht University, Postbus 80000, 3508 TA Utrecht, Netherlands.

6. Center for Space Research, Massachusetts Institute of Technology, NE80-6055, 77 Massachusetts Avenue, Cambridge, MA 02139–4307, USA.

7. Harvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, MA 02138, USA.

Abstract

We have detected, at x-ray and radio wavelengths, large-scale moving jets from the microquasar XTE J1550–564. Plasma ejected from near the black hole traveled at relativistic velocities for at least 4 years. We present direct evidence for gradual deceleration in a relativistic jet. The broadband spectrum of the jets is consistent with synchrotron emission from high-energy (up to 10 tera–electron volts) particles that were accelerated in the shock waves formed within the relativistic ejecta or by the interaction of the jets with the interstellar medium. XTE J1550–564 offers a rare opportunity to study the dynamical evolution of relativistic jets on time scales inaccessible for active galactic nuclei jets, with implications for our understanding of relativistic jets from Galactic x-ray binaries and active galactic nuclei.

Publisher

American Association for the Advancement of Science (AAAS)

Subject

Multidisciplinary

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