تقرير
The Radio Structure of the Narrow-Line Seyfert 1 Mrk 783 with VLBA and e-MERLIN
| العنوان: | The Radio Structure of the Narrow-Line Seyfert 1 Mrk 783 with VLBA and e-MERLIN |
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| المؤلفون: | Congiu, E., Kharb, P., Tarchi, A., Berton, M., Caccianiga, A., Chen, S., Crepaldi, L., Di Mille, F., Järvelä, E., Jarvis, M. E., La Mura, G., Vietri, A. |
| سنة النشر: | 2020 |
| المجموعة: | Astrophysics |
| مصطلحات موضوعية: | Astrophysics - Astrophysics of Galaxies |
| الوصف: | In this paper, we present the analysis of new radio and optical observations of the narrow-line Seyfert 1 galaxy Mrk 783. 1.6 GHz observations performed with the e-MERLIN interferometer confirm the presence of the diffuse emission previously observed. The Very Long Baseline Array (VLBA) also detects the nuclear source both at 1.6 GHz (L-Band) and 5 GHz (C-band). While the L-band image shows only an unresolved core, the C-band image shows the presence of a partially resolved structure, at a position angle of 60{\deg}. The brightness temperature of the emission in both bands ($>10^6$ K) suggests that it is a pc-scale jet produced by the AGN. The relatively steep VLBA spectral index ($\alpha_{VLBA} = 0.63\pm0.03$) is consistent with the presence of optically thin emission on milliarcsecond scales. Finally, we investigated two possible scenarios that can result in the misalignment between the kpc and pc-scale radio structure detected in the galaxy. We also analysed the optical morphology of the galaxy, which suggests that Mrk 783 underwent a merging in relatively recent times. Comment: 10 pages, 6 figures, accepted for publication on MNRAS |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.1093/mnras/staa3024 |
| الوصول الحر: | http://arxiv.org/abs/2009.13529Test |
| رقم الانضمام: | edsarx.2009.13529 |
| قاعدة البيانات: | arXiv |
| DOI: | 10.1093/mnras/staa3024 |
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