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

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

doi:10.1051/0004-6361/201833378

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

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

Universidad de Concepción

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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.

Original language	English
Article number	L1
Number of pages	6
Journal	Astronomy and Astrophysics
Volume	614
DOIs	https://doi.org/10.1051/0004-6361/201833378
Publication status	Published - 1 Jun 2018
MoE publication type	A1 Journal article-refereed

Keywords

Galaxies: active
Galaxies: Seyfert
Gamma rays: galaxies

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10.1051/0004-6361/201833378

ELEC-Lahteenmaki-et-al-Radio jets and gamma-ray_AAFinal published version, 269 KB

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title = "Radio jets and gamma-ray emission in radio-silent narrow-line Seyfert 1 galaxies",

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.",

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T1 - Radio jets and gamma-ray emission in radio-silent narrow-line Seyfert 1 galaxies

AU - Lähteenmäki, A.

AU - Järvelä, E.

AU - Ramakrishnan, V.

AU - Tornikoski, M.

AU - Tammi, J.

AU - Vera, R. J.C.

AU - Chamani, Wara

PY - 2018/6/1

Y1 - 2018/6/1

N2 - 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.

AB - 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.

KW - Galaxies: active

KW - Galaxies: Seyfert

KW - Gamma rays: galaxies

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U2 - 10.1051/0004-6361/201833378

DO - 10.1051/0004-6361/201833378

M3 - Article

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SN - 0004-6361

VL - 614

JO - Astronomy and Astrophysics

JF - Astronomy and Astrophysics

M1 - L1

ER -

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

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

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