Opening angles and shapes of parsec-scale AGN jets

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

Tutkimustuotos: Artikkeli kirjassa/konferenssijulkaisussaConference article in proceedingsScientificvertaisarvioitu

79 Lataukset (Pure)

Abstrakti

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.
AlkuperäiskieliEnglanti
Otsikko12th European VLBI Network Symposium, Cagliari, Italy, Oct 2014
KustantajaScuola Internazionale Superiore di Studi Avanzati (SISSA)
Sivumäärä4
TilaJulkaistu - 2015
OKM-julkaisutyyppiA4 Artikkeli konferenssijulkaisussa
TapahtumaEuropean VLBI Network Symposium and Users Meeting - Cagliari, Italia
Kesto: 7 lokak. 201410 lokak. 2014
Konferenssinumero: 12

Julkaisusarja

NimiProceedings of Science
KustantajaScuola Internazionale Superiore di Studi Avanzati (S I S S A)
ISSN (painettu)1824-8039

Conference

ConferenceEuropean VLBI Network Symposium and Users Meeting
LyhennettäEVN Symposium
Maa/AlueItalia
KaupunkiCagliari
Ajanjakso07/10/201410/10/2014

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