Discovery of a Fanaroff–Riley type 0 radio galaxy emitting at γ-ray energies. Issue 1 (19th January 2016)

• Record Type: Journal Article
• Authors: Grandi, Paola; Capetti, Alessandro; Baldi, Ranieri D.
• Is Part Of: Monthly notices of the Royal Astronomical Society. Volume 457:Issue 1(2016)
• Page Start: 2
• Page End: 8
• Publication Date: 2016-01-19
• Subjects: galaxies: active -- galaxies: individual: Tol1326–379 -- galaxies: jets -- gamma-rays: galaxies -- radio continuum: galaxies; Astronomy -- Periodicals; Periodicals; 520.5
• DOI: 10.1093/mnras/stv2846
• Languages: English
• ISSNs: 0035-8711

Abstract

Abstract: We present supporting evidence for the first association of a Fermi source, 3FGLJ1330.0−3818, Acero et al. (2015) with the Fanaroff–Riley type 0 (FR 0) radio galaxy Tol1326−379. FR 0s represent the majority of the local population of radio-loud active galactic nuclei but their nature is still unclear. They share the same nuclear and host properties as FR Is, but they show a large deficit of extended radio emission. Here we show that FR 0s can emit photons at very high energies. Tol1326−379 has a GeV luminosity of L >1 GeV ∼ 2 × 10 42 erg s −1, typical of FR Is, but with a steeper γ-ray spectrum (Γ = 2.78 ± 0.14). This could be related to the intrinsic jet properties but also to a different viewing angle.