Radio jets and gamma-ray emission in radio-silent narrow-line Seyfert 1 galaxies

Lähteenmäki, A.; Järvelä, E.; Ramakrishnan, V.; Tornikoski, M.; Tammi, J.; Vera, R. J.C.; Chamani, W.

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Radio jets and gamma-ray emission in radio-silent narrow-line Seyfert 1 galaxies

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Title:	Radio jets and gamma-ray emission in radio-silent narrow-line Seyfert 1 galaxies
Author(s):	Lähteenmäki, A. ; Järvelä, E. ; Ramakrishnan, V. ; Tornikoski, M. ; Tammi, J. ; Vera, R. J.C. ; Chamani, W.
Date:	2018-06-01
Language:	en
Pages:	6
Department:	Metsähovi Radio Observatory Department of Electronics and Nanoengineering
Series:	Astronomy and Astrophysics, Volume 614
ISSN:	0004-6361 1432-0746
DOI-number:	10.1051/0004-6361/201833378
Subject:	Astronomy and Astrophysics, Space and Planetary Science, 115 Astronomy and space science
Keywords:	Galaxies: active, Galaxies: Seyfert, Gamma rays: galaxies, Astronomy and Astrophysics, Space and Planetary Science, 115 Astronomy and space science
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Citation: Lähteenmäki , A , Järvelä , E , Ramakrishnan , V , Tornikoski , M , Tammi , J , Vera , R J C & Chamani , W 2018 , ' Radio jets and gamma-ray emission in radio-silent narrow-line Seyfert 1 galaxies ' Astronomy and Astrophysics , vol 614 , L1 . DOI: 10.1051/0004-6361/201833378
Abstract: We have detected six narrow-line Seyfert 1 (NLS1) galaxies at 37 GHz that were previously classified as radio silent and two that were classified as radio quiet. These detections reveal the presumption that NLS1 galaxies labelled radio quiet or radio silent and hosted by spiral galaxies are unable to launch jets to be incorrect. The detections are a plausible indicator of the presence of a powerful, most likely relativistic jet because this intensity of emission at 37 GHz cannot be explained by, for example, radiation from supernova remnants. Additionally, one of the detected NLS1 galaxies is a newly discovered source of gamma rays and three others are candidates for future detections.

Permanent link to this item: http://urn.fi/URN:NBN:fi:aalto-201808014111 Email this Export to RefWorks QR Code Print BibTex Tweet