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          Institute: MPI für Radioastronomie     Collection: Publikationen des MPI für Radioastronomie     Display Documents

ID: 125437.0, MPI für Radioastronomie / Publikationen des MPI für Radioastronomie
Internal structure and dynamics of the kiloparsec-scale jet in M87
Authors:Lobanov, A.; Hardee, P.; Eilek, J.
Date of Publication (YYYY-MM-DD):2003-10
Title of Journal:New Astronomy Reviews
Journal Abbrev.:New Astron. Rev.
Issue / Number:6-7
Start Page:629
End Page:632
Review Status:Internal review
Audience:Experts Only
Abstract / Description:Detailed analysis of HST and VLA observations enables quantitative modeling of the internal structure of the kiloparsec-scale jet in M87. The jet transverse profiles can be modeled by double-Gaussian profiles. The jet structure is dominated by two threads resembling closely a double helix visible until about 20" distance. It is produced by a combination of the helical mode and of the elliptical mode of Kelvin-Helmholtz instability. The elliptical mode dominates the pre-knot A jet, while the helical mode becomes prominent at larger distances. Modeling the jet structure constrains well the instability pattern speed, beta(w) = 0.5c and jet viewing angle, theta(j) = 40degrees. The estimated bulk Lorentz factor of the jet is 3.4. The model reproduces the jet structure on scales of up to 50" (accounting for the jet curvature). (C) 2003 Elsevier B.V. All rights reserved.
Free Keywords:AGN, relativistic jets, Kelvin- Helmholtz instability
Comment of the Author/Creator:Date: 2003, OCT
External Publication Status:published
Document Type:Article
Communicated by:N. N.
Affiliations:MPI für Radioastronomie
External Affiliations:Max Planck Inst Radioastron, D-53121 Bonn, Germany.; Univ Alabama, Tuscaloosa, AL USA.; New Mexico Inst Min & Technol, Socorro, NM USA.
Identifiers:ISI:000186210600049 [ID No:1]
ISSN:1387-6473 [ID No:2]
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