Opening angles and shapes of parsec-scale AGN jets

 Alexander B. Pushkarev,  Matthew L. Lister,  Yuri Y. Kovalev,  Tuomas Savolainen

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Abstract

We used 15 GHz VLBA observations of 363 sources having at least 5 epochs within a time interval 1995-2013 from the MOJAVE program and/or its predecessor, the 2 cm VLBA Survey. For each source we produced a corresponding stacked image averaging all available epochs for a better reconstruction of the cross section of the flow. We have analyzed jet profiles transverse to the local jet ridge line and derived both apparent and intrinsic opening angles of the parsecscale outflows. The sources detected by the Fermi Large Area Telescope (LAT) during the first 24 months of operation show wider apparent jet opening angle and smaller viewing angles on a very high level of significance supporting our early findings. Analyzing transverse shapes of the outflows we found that most sources have conical jet geometry at parsec scales, though there are also sources that exhibit active jet collimation.
Original languageEnglish
Title of host publication12th European VLBI Network Symposium, Cagliari, Italy, Oct 2014
PublisherScuola Internazionale Superiore di Studi Avanzati (S I S S A)
Number of pages4
Publication statusPublished - 2015
MoE publication typeA4 Article in a conference publication
EventEuropean VLBI Network Symposium and Users Meeting - Cagliari, Italy
Duration: 7 Oct 201410 Oct 2014
Conference number: 12

Publication series

NameProceedings of Science
PublisherScuola Internazionale Superiore di Studi Avanzati (S I S S A)
ISSN (Print)1824-8039

Conference

ConferenceEuropean VLBI Network Symposium and Users Meeting
Abbreviated titleEVN Symposium
CountryItaly
CityCagliari
Period07/10/201410/10/2014

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    Pushkarev, AB., Lister, ML., Kovalev, YY., & Savolainen, T. (2015). Opening angles and shapes of parsec-scale AGN jets. In 12th European VLBI Network Symposium, Cagliari, Italy, Oct 2014 [104] (Proceedings of Science). Scuola Internazionale Superiore di Studi Avanzati (S I S S A).