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arXiv:astro-ph/9603140 (astro-ph)
[Submitted on 27 Mar 1996 (v1), last revised 20 Aug 1996 (this version, v2)]

Title:The matter content of the jet in M87: evidence for an electron-positron jet

Authors:C.S.Reynolds (1), A.C.Fabian (1), A.Celotti (1,2), M.J.Rees (1) ((1) Institute of Astronomy, Cambridge, UK (2) SISSA, Trieste, Italy)
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Abstract: Recent observations have allowed the geometry and kinematics of the M87 jet to be tightly constrained. We combine these constraints with historical Very Long Baseline Interferometry (VLBI) results and the theory of synchrotron self-absorbed radio cores in order to investigate the physical properties of the jet. Our results strongly suggest the jet to be dominated by an electron-positron (pair) plasma. Although our conservative constraints cannot conclusively dismiss an electron-proton plasma, the viability of this solution is extremely vulnerable to further tightening of VLBI surface brightness limits. The arguments presented, coupled with future high-resolution multi-frequency VLBI studies of the jet core, will be able to firmly distinguish these two possibilities.
Comments: 8 pages, 1 ps figure. Revised and accepted for publication in MNRAS
Subjects: Astrophysics (astro-ph)
Cite as: arXiv:astro-ph/9603140
  (or arXiv:astro-ph/9603140v2 for this version)
  https://doi.org/10.48550/arXiv.astro-ph/9603140
Related DOI: https://doi.org/10.1093/mnras/283.3.873

Submission history

From: Chris Reynolds [view email]
[v1] Wed, 27 Mar 1996 12:15:48 UTC (31 KB)
[v2] Tue, 20 Aug 1996 15:59:57 UTC (19 KB)
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