Prospects for gamma-ray observations of narrow-line Seyfert 1 galaxies with the Cherenkov Telescope Array II. gamma-gamma absorption in the broad-line region radiation fields

0546366 - FZÚ 2022 RIV GB eng J - Journal Article
Romano, P. … Total 6 authors
Prospects for gamma-ray observations of narrow-line Seyfert 1 galaxies with the Cherenkov Telescope Array II. gamma-gamma absorption in the broad-line region radiation fields.
Monthly Notices of the Royal Astronomical Society. Roč. 494, č. 1 (2020), s. 411-424. ISSN 0035-8711. E-ISSN 1365-2966
Research Infrastructure: CTA-CZ II - 90105
Keywords : galaxies: jets * galaxies: Seyfert * gamma rays: galaxies
OECD category: Particles and field physics
Impact factor: 5.287, year: 2020
Method of publishing: Limited access
https://doi.org/10.1093/mnras/staa600

Gamma-ray emitting narrow-line Seyfert 1 (gamma-NLS1) galaxies possibly harbour relatively low-mass black holes (10(6)-10(8) M-circle dot) accreting close to the Eddington limit, and share many characteristics with their sibling sources, flat-spectrum radio quasars. Although they have been detected in the MeV-GeV band with Fermi - LAT, they have never been seen in the very high energy band with current imaging atmospheric Cherenkov telescopes (IACTs). Thus, they are key targets for the next-generation IACT, the Cherenkov Telescope Array (CTA). In a previous work we selected, by means of extensive simulations, the best candidates for a prospective CTA detection (SBS 0846+513, PMN J0948+0022, and PKS 1502+036) taking into account the effects of both the intrinsic absorption (approximated with a cut-off at 30 GeV), and the extragalactic background light on the propagation of gamma-rays.

Permanent Link: http://hdl.handle.net/11104/0322901