Radio-emitting narrow-line Seyfert 1 galaxies in the JVLA perspective
| Autor: | 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. |
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| Rok vydání: | 2018 |
| Předmět: | |
| Zdroj: | A&A 614, A87 (2018) |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1051/0004-6361/201832612 |
| Popis: | 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 in order to fully understand their role in the unification pictures. Comment: 36 pages, 45 figures, 10 tables, accepted for publication by Astronomy & Astrophysics |
| Databáze: | arXiv |
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