New results on particle acceleration in the Centaurus A jet and counterjet from a deep Chandra observation

Abstract

We present new deep Chandra observations of the Centaurus A jet, with a combined on-source exposure time of 719 ks. These data allow detailed X-ray spectral measurements to be made along the jet out to its disappearance at 4.5 kpc from the nucleus. We distinguish several regimes of high-energy particle acceleration: while the inner part of the jet is dominated by knots and has properties consistent with local particle acceleration at shocks, the particle acceleration in the outer 3.4 kpc of the jet is likely to be dominated by an unknown distributed acceleration mechanism. In addition to several compact counterjet features we detect probable extended emission from a counterjet out to 2.0 kpc from the nucleus, and argue that this implies that the diffuse acceleration process operates in the counterjet as well. A preliminary search for X-ray variability finds no jet knots with dramatic flux density variations, unlike the situation seen in M87.

arXiv commentApJ L accepted. 4 pages, 4 figures. Some figures reduced in quality, publication-quality version available at http://hercules.herts.ac.uk/~mjh/cena-jet.pdf

References in corpus (10)

• Radio and X-ray observations of the jet in Centaurus A
• Radiation from the Relativistic Jet: a Role of the Shear Boundary Layer
• The Outburst of HST-1 in the M87 Jet
• Chandra observations of the X-ray jet in 3C66B
• Chandra Observations of the X-ray Jet in Centaurus A
• The Discovery of Cepheids and a Distance to NGC 5128
• Chandra finds X-ray jets are common in low-power radio galaxies
• A Chandra study of particle acceleration in the multiple hotspots of nearby radio galaxies
• The X-ray Jet in Centaurus A: Clues on the Jet Structure and Particle Acceleration
• The infrared jet in Centaurus A: multiwavelength constraints on emission mechanisms and particle acceleration

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