Revisiting narrow-line Seyfert 1 galaxies and their place in the Universe

The JVLA view of NLS1

11 Apr 2018, 16:40

20m

Orto Botanico di Padova

Talk

Speaker

Marco Berton (Università di Padova)

Description

I will present the results of the largest radio survey to date dedicated to narrow-line Seyfert 1 galaxies (NLS1). We observed 72 objects with JVLA in A-configuration, obtaining high-resolution maps with unprecedented sensitivity. The sample includes both formally radio-quiet and radio-loud NLS1s, confirming a substantial morphological difference between these two classes at fixed flux sensitivity. Furthermore, I will show how, unlike classical blazars, flat-spectrum radio-loud NLS1s do not show strong diffuse emission, suggesting that NLS1s have underdeveloped radio lobes, possibly because of their young age. Finally, I will discuss these results in the frame of an orientation-based unification of young radio-loud AGN.