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Very Long Baseline Interferometry search for the radio counterpart of HESS J1943+213
journal contribution
posted on 2023-05-18, 04:21 authored by Gabanyi, KE, Dubner, G, Giacani, E, Paragi, Z, Frey, S, Pidopryhora, YHESS 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.
History
Publication title
The Astrophysical JournalVolume
762Article number
63Number
63Pagination
1-7ISSN
0004-637XDepartment/School
School of Natural SciencesPublisher
Univ Chicago PressPlace of publication
1427 E 60Th St, Chicago, USA, Il, 60637-2954Rights statement
Copyright 2013 The American Astronomical Society.Repository Status
- Open