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http://hdl.handle.net/20.500.12386/28008
Titolo: | Radio-emitting narrow-line Seyfert 1 galaxies in the JVLA perspective | Autori: | Berton, M. Congiu, E. Järvelä, E. Antonucci, R. Kharb, P. Lister, M. L. TARCHI, ANDREA CACCIANIGA, Alessandro Chen, S. FOSCHINI, LUIGI Lähteenmäki, A. Richards, J. L. Ciroi, S. Cracco, V. Frezzato, M. La Mura, G. Rafanelli, P. |
Data pubblicazione: | 2018 | Rivista: | ASTRONOMY & ASTROPHYSICS | Numero: | 614 | Da pagina:: | A87 | Abstract: | 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. <P />The reduced images (FITS files) are only available at the CDS via anonymous ftp to <A href="https://cdsarc.u-strasbg.fr">http://cdsarc.u-strasbg.fr</A> (ftp://130.79.128.5) or via <A href="https://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/614/A87">http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/614/A87</A> | URI: | http://hdl.handle.net/20.500.12386/28008 | URL: | https://www.aanda.org/articles/aa/abs/2018/06/aa32612-18/aa32612-18.html | ISSN: | 0004-6361 | DOI: | 10.1051/0004-6361/201832612 | Bibcode ADS: | 2018A&A...614A..87B | Fulltext: | open |
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