Discovery of a Fanaroff-Riley type 0 radio galaxy emitting at gamma-ray energies

作者：Grandi Paola^*; Capetti Alessandro^*; Baldi Ranieri D^*

来源：Monthly Notices of the Royal Astronomical Society, 2016, 457(1): 2-8.

DOI：10.1093/mnras/stv2846

• galaxies: active
• galaxies: individual: Tol1326-379
• galaxies: jets
• gamma-rays: galaxies
• radio continuum: galaxies

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->1GeV similar to 2 x 10(42) erg s(-1), typical of FR Is, but with a steeper gamma-ray spectrum (Gamma = 2.78 +/- 0.14). This could be related to the intrinsic jet properties but also to a different viewing angle.

• 出版日期2016-3-21