2020
DOI: 10.1093/mnras/staa1593
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A search for γ-ray emission from a sample of local Universe low-frequency selected radio galaxies

Abstract: Radio galaxies are uncommon γ-ray emitters, and only low-redshift radio galaxies are detected with the Fermi Large Area Telescope (Fermi-LAT). However, they offer potential insights into the emission mechanisms of active galaxies, particularly as the alignment of their jets with respect to the Earth means that, unlike blazars, their emission is not necessarily jet dominated. We use the Fermi-LAT data to perform an unbiased survey of 78 radio galaxies from the Bologna complete sample in order to search for new … Show more

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Cited by 5 publications
(4 citation statements)
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“…In terms of nuclear and host properties, FR 0s are indistinguishable from FR Is (e.g., BH mass, core and bolometric luminosities, host type and mass), and in addition, FR 0s lie on the same correlation between JVLA core power and accretion power (estimated from the [O III] line and X-ray emission [64,72,73]), defined by FR Is: this clearly indicates a common central engine, where the jet is the main contributor to the whole bolometric power. At the extreme high energies, a few FR 0s (and candidates) have been detected in the γ-ray band by the Fermi Telescope [74][75][76][77] and have been proposed as possible sources of cosmic neutrinos and high-energy cosmic rays [78][79][80]. All these results foster the idea that the putative jets of FR 0s are possibly characterized by a relativistic bulk speed and that FR 0s may play a crucial role in galaxy evolution via a continuous low-regime jet feedback [81], as supported by numerical simulations of low-power jets (e.g., [82][83][84]).…”
Section: Introductionmentioning
confidence: 99%
“…In terms of nuclear and host properties, FR 0s are indistinguishable from FR Is (e.g., BH mass, core and bolometric luminosities, host type and mass), and in addition, FR 0s lie on the same correlation between JVLA core power and accretion power (estimated from the [O III] line and X-ray emission [64,72,73]), defined by FR Is: this clearly indicates a common central engine, where the jet is the main contributor to the whole bolometric power. At the extreme high energies, a few FR 0s (and candidates) have been detected in the γ-ray band by the Fermi Telescope [74][75][76][77] and have been proposed as possible sources of cosmic neutrinos and high-energy cosmic rays [78][79][80]. All these results foster the idea that the putative jets of FR 0s are possibly characterized by a relativistic bulk speed and that FR 0s may play a crucial role in galaxy evolution via a continuous low-regime jet feedback [81], as supported by numerical simulations of low-power jets (e.g., [82][83][84]).…”
Section: Introductionmentioning
confidence: 99%
“…Based on the catalog of 4FGL-DR2, 44 radio galaxies are detected by Fermi-LAT (Abdollahi et al 2020). We adopted the classifications of Angioni et al (2020), Harvey et al (2020), andRulten et al (2020) to classify 44 radio galaxies into FR Type I or Type II radio galaxies. If these references render discrepant classifications for the same sources, we searched other references to classify them.…”
Section: Fr-i Samplesmentioning
confidence: 99%
“…The latter class shows prominent hot spots at the end of their powerful radio lobes (i.e., edge-brightened sources), whereas the former class is weaker and more diffuse (i.e., edge-darkened sources; Merten et al 2021). Both classes of RGs are well known to emit high-energy γ rays (Abdo et al 2009(Abdo et al , 2010Inoue 2011;Di Mauro et al 2014;Angioni et al 2019;Stecker et al 2019;Harvey et al 2020;Rulten et al 2020).…”
Section: Introductionmentioning
confidence: 99%