Radio-emitting narrow-line Seyfert 1 galaxies in the JVLA perspective

We report the first results of a survey on 74 narrow-line Seyfert 1 galaxies (NLS1s) carried out in 2015 with the Karl G. Jansky Very Large Array (JVLA) at 5 GHz in A-configuration. So far, this is the largest survey aimed to image the radio continuum of NLS1s. We produced radio maps in order to compare the general properties of three different samples of objects: radio-quiet NLS1s (RQNLS1s), steep-spectrum radio-loud NLS1s (S-NLS1s), and flat-spectrum radio-loud NLS1s (F-NLS1s). We find that the three classes correspond to different radio morphologies, with F-NLS1s being more compact, and RQNLS1s often showing diffuse emission on kpc scales. We also find that F-NLS1s might be low-luminosity and possibly young blazars, and that S-NLS1s are part of the parent population of F-NLS1s. Dedicated studies to RQNLS1s are needed to fully understand their role in the unification pictures.

Keywords

Galaxies: active, Galaxies: jets, Galaxies: Seyfert, Quasars: supermassive black holes

DOI

10.1051/0004-6361/201832612

Citation

Berton , M , Congiu , E , Järvelä , E , Antonucci , R , Kharb , P , Lister , M L , Tarchi , A , Caccianiga , A , Chen , S , Foschini , L , Lähteenmäki , A , Richards , J L , Ciroi , S , Cracco , V , Frezzato , M , La Mura , G & Rafanelli , P 2018 , ' Radio-emitting narrow-line Seyfert 1 galaxies in the JVLA perspective ' , Astronomy and Astrophysics , vol. 614 , A87 . https://doi.org/10.1051/0004-6361/201832612

Permanent link to this item

https://urn.fi/URN:NBN:fi:aalto-201808014280

Collections

[article-cris] Sähkötekniikan korkeakoulu / ELEC

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