A MODIFIED SYNCHROTRON MODEL FOR KNOTS IN THE M87 JET

@article{Liu2007AMS,
  title={A MODIFIED SYNCHROTRON MODEL FOR KNOTS IN THE M87 JET},
  author={Wen-Po Liu and Zhi-qiang Shen},
  journal={The Astrophysical Journal},
  year={2007},
  volume={668}
}
To explain the broadband spectral shape of knots in the M87 jet from radio through optical to X-rays, we propose a modified synchrotron model that considers the integrated effect of particle injection from different acceleration sources in the thin acceleration region. This results in two break frequencies at two sides of which the spectral index of knots in the M87 jet changes. We discuss the possible implications of these results for the physical properties in the M87 jet. The observed flux… Expand

Figures and Tables from this paper

A two-zone synchrotron model for the knots in the M87 jet
The flux and the spectral index in the X-ray energy band from the knots of the M87 jet as observed by Chandra indicate a possible synchrotron origin but cannot be explained by simple one-zone modelsExpand
AN ASYMMETRICAL SYNCHROTRON MODEL FOR KNOTS IN THE 3C 273 JET
To interpret the emission of knots in the 3C 273 jet from radio to X-rays, we propose a synchrotron model in which, owing to the shock compression effect, the injection spectra from a shock into theExpand
The X-ray emission from the knots in 3C 120
Abstract3C 120 is a Seyfert galaxy with a well detected X-ray jet. We investigate the X-ray emission of its five jet knots and fit their spectral energy distributions (SEDs) from the radio to theExpand
A modified stratified model for the 3C 273 jet
We present a modified stratified jet model to interpret the observed spectral energy distributions of knots in the 3C 273 jet. Based on the hypothesis of the single index of the particle energyExpand
Determination of the intrinsic velocity field in the M87 jet
A new method to estimate the Doppler beaming factor of relativistic large-scale jet regions is presented. It is based on multiwaveband fitting to radio-to-X-ray continua with synchrotron spectrumExpand
Energy distribution of relativistic electrons in the kiloparsec scale jet of M 87 with Chandra
The X-ray emission from the jets in active galactic nuclei (AGN) carries important information on the distributions of relativistic electrons and magnetic fields on large scales. We reanalysedExpand
Nonthermal processes of fast outflows from astrophysical objects
Outflows are ubiquitous phenomena in the universe. They have been widely observed in both Galactic and extragalactic objects. In this thesis, we analyze three individual sources. Firstly, weExpand
Examining the High-energy Radiation Mechanisms of Knots and Hotspots in Active Galactic Nucleus Jets
We compile the radio-optical-X-ray spectral energy distributions (SEDs) of 65 knots and 29 hotspots in 41 active galactic nucleus jets to examine their high energy radiation mechanisms. Their SEDsExpand
X-RAY RADIATION MECHANISMS AND BEAMING EFFECT OF HOT SPOTS AND KNOTS IN ACTIVE GALACTIC NUCLEAR JETS
The observed radio-optical-X-ray spectral energy distributions (SEDs) of 22 hot spots and 45 knots in the jets of 35 active galactic nuclei are complied from the literature and modeled withExpand
High energy emission processes in OJ 287 during 2009 flare
The broad-band spectrum of a BL Lac object, OJ 287, from radio to γ-rays obtained during a major γ-ray flare detected by Fermi in 2009 is studied to understand the high energy emission mechanismExpand
...
1
2
...

References

SHOWING 1-10 OF 33 REFERENCES
Ultraviolet HST Observations of the Jet in M87
We present new ultraviolet photometry of the jet in M87 obtained from HST WFPC2 imaging. We combine these ultraviolet data with previously published photometry for the knots of the jet in radio,Expand
Flaring X-Ray Emission from HST-1, a Knot in the M87 Jet
We present Chandra X-ray monitoring of the M87 jet in 2002, which shows that the intensity of HST-1, an optical knot 08 from the core, increased by a factor of 2 in 116 days and a factor of 4 in 2Expand
The X-Ray Emissions from the M87 Jet: Diagnostics and Physical Interpretation
We reanalyze the deep Chandra observations of the M87 jet, first examined by Wilson & Yang in 2002. By employing an analysis chain that also includes image deconvolution, knots HST-1 and I are fullyExpand
The Outburst of HST-1 in the M87 Jet
The X-ray intensity of knot HST-1, 085 from the nucleus of the radio galaxy M87, has increased by more than a factor of 50 during the last 5 yr. The optical increase is similar, and our more limitedExpand
The radio to X-ray spectrum of the M87 jet and nucleus
Einstein Observatory high-resolution imager data are used in conjunction with recent radio and optical observations to examine the morphology of the M87 jet; IR and UV data from the literature areExpand
Dynamics and high-energy emission of the flaring HST-1 knot in the M 87 jet
Stimulated by recent observations of a giant radio-to-X-ray synchrotron flare from Hubble Space Telescope (HST)-1, the innermost knot of the M 87 jet, as well as by the detection of a very highExpand
Is the core of m87 the source of its TeV emission? implications for unified schemes
M87 has recently been shown to be a TeV source that is likely to be variable. Based on this and on contemporaneous optical and X-ray monitoring, we argue that the source of the TeV emission is theExpand
The Radio-ultraviolet spectral energy distribution of the jet in 3C 273
We present deep VLA and HST observations of the large-scale jet in 3C 273 matched to 0. �� 3 resolution. The observed spectra show a significant flattening in the infrared-ultraviolet wavelengthExpand
CHANDRA X-RAY IMAGING AND SPECTROSCOPY OF THE M87 JET AND NUCLEUS
We report X-ray imaging spectroscopy of the jet of M87 at subarcsecond resolution with the Chandra X-ray Observatory. The galaxy nucleus and all the knots seen at radio and optical wavelengths, asExpand
X-Ray Emission from Extragalactic Jets
AbstractThis review focuses on the X-ray emission processes of extragalactic jets on scales resolvable by the subarcsec resolution of the Chandra X-ray Observatory. It is divided into four parts. TheExpand
...
1
2
3
4
...