Science-advisor
REGISTER info/FAQ
Login
username
password
     
forgot password?
register here
 
Research articles
  search articles
  reviews guidelines
  reviews
  articles index
My Pages
my alerts
  my messages
  my reviews
  my favorites
 
 
Stat
Members: 3643
Articles: 2'487'895
Articles rated: 2609

28 March 2024
 
  » arxiv » astro-ph/0102445

 Article overview


Optical Structure and Physics of the M87 Jet
Eric Perlman ; William Sparks ; John Biretta ; Duccio Macchetto ; J. Patrick Leahy ;
Date 26 Feb 2001
Subject astro-ph
AffiliationU. of Maryland), William Sparks, John Biretta, Duccio Macchetto (Space Telescope Science Institute), J. Patrick Leahy (Jodrell Bank
AbstractWe summarize HST observations of the M87 jet, concentrating on polarimetry and spectral index maps, and compare its optical and radio structures. The evidence now supports a stratified model for the structure of the jet, whereby high-energy, optical synchrotron emitting particles occupy physically different regions of the jet, closer to the jet axis, with different magnetic field configurations. It is in these regions where the shocks that produce the knots in the inner jet appear to originate. Knot regions have optical spectra which are much flatter than average for the jet, with the flattest-spectrum regions coinciding with flux maxima of knots. These same regions are preceded by regions where perpendicular magnetic fields are seen. Thus not only do we see all the necessary ingredients for {it in situ} particle acceleration in the knots, but there is now fairly direct evidence for it as well. By tracking the changes in radio-optical and optical spectral index in the knot regions, we can comment on acceleration and cooling timescales in each knot.
Source arXiv, astro-ph/0102445
Services Forum | Review | PDF | Favorites   
 
Visitor rating: did you like this article? no 1   2   3   4   5   yes

No review found.
 Did you like this article?

This article or document is ...
important:
of broad interest:
readable:
new:
correct:
Global appreciation:

  Note: answers to reviews or questions about the article must be posted in the forum section.
Authors are not allowed to review their own article. They can use the forum section.

browser claudebot






ScienXe.org
» my Online CV
» Free


News, job offers and information for researchers and scientists:
home  |  contact  |  terms of use  |  sitemap
Copyright © 2005-2024 - Scimetrica