The connection between the parsec-scale radio jet and γ -ray flares in the blazar 1156+295
The connection between the parsec-scale radio jet and γ -ray flares in the blazar 1156+295
The blazar 1156+295 was active at γ-ray energies, exhibiting three prominent flares during the year 2010. Here, we present results using the combination of broad-band (X-ray through mm single-dish) monitoring data and radio-band imaging data at 43 GHz on the connection of γ-ray events to the ejections of superluminal components and other changes in the jet of 1156+295. The kinematics of the jet over the interval 2007.0–2012.5 using 43 GHz Very Long Baseline Array observations reveal the presence of four moving and one stationary component in the inner region of the blazar jet. The propagation of the third and fourth components in the jet corresponds closely in time to the active phase of the source in γ-rays. We briefly discuss the implications of the structural changes in the jet for the mechanism of γ-ray production during bright flares. To localize the γ-ray emission site in the blazar, we performed the correlation analysis between the 43 GHz radio core and the γ-ray light curve. The time lag obtained from the correlation constrains the γ-ray emitting region in the parsec-scale jet.
1636-1646
Ramakrishnan, Venkatessh
a90c3509-772c-4a6b-90bf-ee1d10a7bfb5
Mchardy, Ian
4f215137-9cc4-4a08-982e-772a0b24c17e
1 December 2014
Ramakrishnan, Venkatessh
a90c3509-772c-4a6b-90bf-ee1d10a7bfb5
Mchardy, Ian
4f215137-9cc4-4a08-982e-772a0b24c17e
Ramakrishnan, Venkatessh
,
et al.
(2014)
The connection between the parsec-scale radio jet and γ -ray flares in the blazar 1156+295.
Monthly Notices of the Royal Astronomical Society, .
Abstract
The blazar 1156+295 was active at γ-ray energies, exhibiting three prominent flares during the year 2010. Here, we present results using the combination of broad-band (X-ray through mm single-dish) monitoring data and radio-band imaging data at 43 GHz on the connection of γ-ray events to the ejections of superluminal components and other changes in the jet of 1156+295. The kinematics of the jet over the interval 2007.0–2012.5 using 43 GHz Very Long Baseline Array observations reveal the presence of four moving and one stationary component in the inner region of the blazar jet. The propagation of the third and fourth components in the jet corresponds closely in time to the active phase of the source in γ-rays. We briefly discuss the implications of the structural changes in the jet for the mechanism of γ-ray production during bright flares. To localize the γ-ray emission site in the blazar, we performed the correlation analysis between the 43 GHz radio core and the γ-ray light curve. The time lag obtained from the correlation constrains the γ-ray emitting region in the parsec-scale jet.
Text
The connection between the parsec-scale radio jet and γ -ray flares
- Accepted Manuscript
More information
Accepted/In Press date: 14 September 2014
e-pub ahead of print date: 13 October 2014
Published date: 1 December 2014
Additional Information:
Arxiv 1409.2542 author McHardy confirmed AM
Organisations:
Astronomy Group
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Local EPrints ID: 411754
URI: http://eprints.soton.ac.uk/id/eprint/411754
ISSN: 1365-2966
PURE UUID: 08c964b6-1c8a-4253-acfb-240386ec644d
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Date deposited: 23 Jun 2017 16:31
Last modified: 15 Mar 2024 14:46
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Author:
Venkatessh Ramakrishnan
Author:
Ian Mchardy
Corporate Author: et al.
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