High-energy particle acceleration at the radio-lobe shock of Centaurus A

@article{Croston2009HighenergyPA,
  title={High-energy particle acceleration at the radio-lobe shock of Centaurus A},
  author={Judith H. Croston and Ralph P. Kraft and Martin J. Hardcastle and Mark Birkinshaw and D. M. Worrall and P. E. J. Nulsen and Robert F. Penna and Gregory R. Sivakoff and Andr{\'e}s Jord{\'a}n and Nicola J. Brassington and D. A. Evans and William R. Forman and Marat Gilfanov and Joanna L Goodger and William E. Harris and C. Jones and Adrienne Marie Juett and Stephen S. Murray and Somak Raychaudhury and Craig L. Sarazin and Rasmus Voss and Kristin A. Woodley},
  journal={Monthly Notices of the Royal Astronomical Society},
  year={2009},
  volume={395},
  pages={1999-2012}
}
We present new results on the shock around the southwest radio lobe of Centaurus A using data from the Chandra Very Large Programme observations (740 ks total observing time). The X-ray spectrum of the emission around the outer southwestern edge of the lobe is well described by a single power-law model with Galactic absorption ‐ thermal models are strongly disfavoured, except in the region closest to the nucleus. We conclude that a significant fraction of the X-ray emission around the southwest… 

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References

SHOWING 1-10 OF 54 REFERENCES
A Chandra Study of the Lobe/Interstellar Medium Interactions around the Inner Radio Lobes of Centaurus A: Constraints on the Temperature Structure and Transport Processes
We present results from deeper Chandra observations of the southwest radio lobe of Centaurus A, first described by Kraft and coworkers. We find that the sharp X-ray surface brightness discontinuity
X-RAY EMISSION FROM THE HOT INTERSTELLAR MEDIUM AND SOUTHWEST RADIO LOBE OF THE NEARBY RADIO GALAXY CENTAURUS A
We present results from two Chandra/ACIS-I observations and one XMM-Newton observation of X-ray emission from the interstellar medium (ISM) and the inner radio lobes of the nearby radio galaxy
High-energy Particle Acceleration and Production of Ultra-high-energy Cosmic Rays in the Giant Lobes of Centaurus A
The nearby radio galaxy Centaurus A is poorly studied at high frequencies with conventional radio telescopes because of its very large angular size, but is one of a very few extragalactic objects to
Synchrotron Models for X-Rays from the Supernova Remnant SN 1006
Recent observations with the ASCA satellite (Koyama et al. 1995) have finally settled the question of the nature of the X-ray spectrum from the remnant of the supernova of 1006 AD. The bright rims
The gas density around SN 1006
The density of the ambient medium where the supernova remnant evolves is a relevant parameter for its hydrodynamical evolution, for the mechanism of particle acceleration, and for the emission at TeV
Geometry of the non-thermal emission in SN 1006 - Azimuthal variations of cosmic-ray acceleration
SN 1006 is the prototype of shell supernova remnants, in which non-thermal synchrotron emission dominates the X-ray spectrum. The non-thermal emission is due to the cosmic-ray electrons accelerated
On the Magnetic Fields and Particle Acceleration in Cassiopeia A
We investigate the nonthermal X-ray emission from Cas A, using BeppoSAX, Compton Gamma Ray Observatory OSSE, and Chandra data. For the hard X-ray continuum we test the model proposed by Laming, which
Separating Thermal and Nonthermal X-Rays in Supernova Remnants. II. Spatially Resolved Fits to SN 1006 AD
We present a spatially resolved spectral analysis of full ASCA observations of the remnant of the supernova of A.D. 1006. This remnant shows both nonthermal X-ray emission from bright limbs,
A very deep Chandra observation of the Perseus cluster: shocks, ripples and conduction
We present the first results from a very deep Chandra X-ray observation of the core of the Perseus cluster of galaxies. A pressure map reveals a clear thick band of high pressure around the inner
The X-Ray Synchrotron Emission of RCW 86 and the Implications for Its Age
We report X-ray imaging spectroscopy observations of the northeastern shell of the supernova remnant RCW 86 using Chandra and XMM-Newton. Along this part of the shell, the dominant X-ray radiation
...
1
2
3
4
5
...