Opening angles and shapes of parsec-scale AGN jets

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

Opening angles and shapes of parsec-scale AGN jets

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

Research output: Chapter in Book/Report/Conference proceeding › Conference article in proceedings › Scientific › peer-review

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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 language	English
Title of host publication	12th European VLBI Network Symposium, Cagliari, Italy, Oct 2014
Publisher	Scuola Internazionale Superiore di Studi Avanzati (SISSA)
Number of pages	4
Publication status	Published - 2015
MoE publication type	A4 Conference publication
Event	European VLBI Network Symposium and Users Meeting - Cagliari, Italy Duration: 7 Oct 2014 → 10 Oct 2014 Conference number: 12

Publication series

Name	Proceedings of Science
Publisher	Scuola Internazionale Superiore di Studi Avanzati (S I S S A)
ISSN (Print)	1824-8039

Conference

Conference	European VLBI Network Symposium and Users Meeting
Abbreviated title	EVN Symposium
Country/Territory	Italy
City	Cagliari
Period	07/10/2014 → 10/10/2014

Access to Document

EVN 2014_104Final published version, 341 KBLicence: CC BY-NC-SA

Cite this

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title = "Opening angles and shapes of parsec-scale AGN jets",

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.",

author = " Alexander B. Pushkarev and Matthew L. Lister and Yuri Y. Kovalev and Tuomas Savolainen",

year = "2015",

language = "English",

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publisher = "Scuola Internazionale Superiore di Studi Avanzati (SISSA)",

booktitle = "12th European VLBI Network Symposium, Cagliari, Italy, Oct 2014",

address = "Italy",

note = "European VLBI Network Symposium and Users Meeting, EVN Symposium ; Conference date: 07-10-2014 Through 10-10-2014",

}

Opening angles and shapes of parsec-scale AGN jets. / Pushkarev, Alexander B.; Lister, Matthew L.; Kovalev, Yuri Y. et al.
12th European VLBI Network Symposium, Cagliari, Italy, Oct 2014. Scuola Internazionale Superiore di Studi Avanzati (SISSA), 2015. 104 (Proceedings of Science).

Research output: Chapter in Book/Report/Conference proceeding › Conference article in proceedings › Scientific › peer-review

TY - GEN

T1 - Opening angles and shapes of parsec-scale AGN jets

AU - Pushkarev, Alexander B.

AU - Lister, Matthew L.

AU - Kovalev, Yuri Y.

AU - Savolainen, Tuomas

N1 - Conference code: 12

PY - 2015

Y1 - 2015

N2 - 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.

AB - 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.

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M3 - Conference article in proceedings

T3 - Proceedings of Science

BT - 12th European VLBI Network Symposium, Cagliari, Italy, Oct 2014

PB - Scuola Internazionale Superiore di Studi Avanzati (SISSA)

T2 - European VLBI Network Symposium and Users Meeting

Y2 - 7 October 2014 through 10 October 2014

ER -

Opening angles and shapes of parsec-scale AGN jets

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Metsähovi Radio Observatory

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Opening angles and shapes of parsec-scale AGN jets

Abstract

Publication series

Conference

Access to Document

Other files and links

Fingerprint

Equipment

Metsähovi Radio Observatory

Cite this