تقرير
Radio morphology of southern narrow-line Seyfert 1 galaxies with Very Large Array observations
| العنوان: | Radio morphology of southern narrow-line Seyfert 1 galaxies with Very Large Array observations |
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| المؤلفون: | Chen, S., Jarvela, E., Crepaldi, L., Zhou, M., Ciroi, S., Berton, M., Kharb, P., Foschini, L., Gu, M., La Mura, G., Vietri, A. |
| سنة النشر: | 2020 |
| المجموعة: | Astrophysics |
| مصطلحات موضوعية: | Astrophysics - Astrophysics of Galaxies |
| الوصف: | We present the results of new radio observations carried out with the Karl G. Jansky Very Large Array C-configuration at 5.5 GHz for a sample of southern narrow-line Seyfert 1 galaxies (NLS1s). This work increases the number of known radio-detected NLS1s in the southern hemisphere, and confirms that the radio emission of NLS1s is mainly concentrated in a central region at kpc-scale and only a few sources show diffuse emission. In radio-quiet NLS1s, the radio luminosity tends to be higher in steep-spectrum sources and be lower in flat-spectrum sources, which is opposite to radio-loud NLS1s. This may be because the radio emission of steep NLS1s is dominated by misaligned jets, AGN-driven outflows, or star formation superposing on a compact core. Instead the radio emission of flat NLS1s may be produced by a central core which has not yet developed radio jets and outflows. We discover new NLS1s harboring kpc-scale radio jets and confirm that a powerful jet does not require a large-mass black hole to be generated. We also find sources dominated by star formation. These NLS1s could be new candidates in investigating the radio emission of different mechanisms. Comment: Accepted by MNRAS, 24 pages, 65 figures, 3 tables |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.1093/mnras/staa2373 |
| الوصول الحر: | http://arxiv.org/abs/2006.01700Test |
| رقم الانضمام: | edsarx.2006.01700 |
| قاعدة البيانات: | arXiv |
| DOI: | 10.1093/mnras/staa2373 |
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