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Very Long Baseline Interferometry search for the radio counterpart of HESS J1943+213


Gabanyi, KE and Dubner, G and Giacani, E and Paragi, Z and Frey, S and Pidopryhora, Y, Very Long Baseline Interferometry search for the radio counterpart of HESS J1943+213, The Astrophysical Journal, 762, (1) Article 63. ISSN 0004-637X (2013) [Refereed Article]


Copyright Statement

Copyright 2013 The American Astronomical Society.

DOI: doi:10.1088/0004-637X/762/1/63


HESS J1943+213, a TeV point source close to the Galactic plane recently discovered by the H.E.S.S. Collaboration, was proposed to be an extreme BL Lacertae object, though a pulsar wind nebula (PWN) nature could not be completely discarded. To investigate its nature, we performed high-resolution radio observations with the European Very Long Baseline Interferometry Network (EVN) and reanalyzed archival continuum and HI data. The EVN observations revealed a compact radio counterpart of the TeV source. The low brightness temperature and the resolved nature of the radio source are indications against the beamed BL Lacertae hypothesis. The radio/X-ray source appears immersed in a ~1' elliptical feature, suggesting a possible galactic origin (PWN nature) for the HESS source. We found that HESS J1943+213 is located in the interior of a ~1 diameter HI feature and explored the possibility of them being physically related.

Item Details

Item Type:Refereed Article
Keywords:ISM, supernova remnants - radio continuum, general - radio lines, ISM - techniques, interferometric - X-rays, individuals
Research Division:Physical Sciences
Research Group:Astronomical sciences
Research Field:Galactic astronomy
Objective Division:Expanding Knowledge
Objective Group:Expanding knowledge
Objective Field:Expanding knowledge in the physical sciences
UTAS Author:Pidopryhora, Y (Dr Yurii Pidopryhora)
ID Code:95766
Year Published:2013
Web of Science® Times Cited:8
Deposited By:Mathematics and Physics
Deposited On:2014-10-08
Last Modified:2015-02-07
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