55 citations · 178 across the 17 of their papers we have counts for
18 papers
The Emerging Population of High-energy Emitting Radio Galaxies
G. Bruni, V. S. Paliya, D. J. Saikia +22
High-energy emission from radio galaxies provides a unique laboratory to study the connection between accretion, jet formation, and particle acceleration in active galactic nuclei…
Compact radio galaxies: the case of FR0s
R. D. Baldi, A. Capetti, G. Giovannini +20
Fanaroff-Riley type 0 (FR0) radio galaxies, a newly-identified and abundant population of low-power radio-loud active galactic nuclei, present a significant challenge to our unders…
The TeV emission of 3C273: inverse Compton radiation from shear-accelerated high-energy electrons in the large-scale jet?
F. Tavecchio
The VERITAS Collaboration recently reported the detection of very-high-energy (VHE) gamma-ray emission from the prototypical radio quasar 3C273. The temporal and the spectral prope…
Ultra-extreme high-frequency-peaked BL Lacs: A potential population of MeV synchrotron blazars
A. Sciaccaluga, F. Tavecchio, T. Sbarrato +1
We investigate the potential existence of a new population of BL Lacs, called ultra-extreme high-energy-peaked BL Lacs (UEHBLs), whose synchrotron emission component peaks in the M…
Do multifrequency polarimetric observations of BL Lac rule out a hadronic origin for its X-ray emission?
F. Tavecchio, F. Bolis, E. Sobacchi +2
Recent multifrequency polarimetric observations of the eponymous blazar BL Lac reveal an extremely large degree of polarization in the optical band (average of , reaching $45…
How do recollimation-induced instabilities shape the propagation of hydrodynamic relativistic jets?
A. Costa, G. Bodo, F. Tavecchio +4
Recollimation is a phenomenon of particular importance in the dynamic evolution of jets and in the emission of high-energy radiation. Additionally, the full comprehension of this p…
Probing the low-energy particle content of blazar jets through MeV observations
F. Tavecchio, L. Nava, A. Sciaccaluga +1
Many of the blazars observed by Fermi actually have the peak of their time-averaged gamma-ray emission outside the GeV Fermi energy range, at MeV energies. The detail…
Multifrequency polarimetry of High-Synchrotron Peaked blazars probes the shape of their jets
F. Bolis, E. Sobacchi, F. Tavecchio
Multifrequency polarimetry is emerging as a powerful probe of blazar jets, especially due to the advent of the Imaging X-ray Polarimetry Explorer (IXPE) space observatory. We study…
FR0 jets and recollimation-induced instabilities
A. Costa, G. Bodo, F. Tavecchio +6
The recently discovered population of faint FR0 radiogalaxies has been interpreted as the extension to low power of the classical FRI sources. Their radio emission appears to be co…
Direct observation of an extended X-ray jet at =6.1
L. Ighina, A. Moretti, F. Tavecchio +6
We report on the direct observation of an extended X-ray jet in the =6.1 radio-loud Active Galactic Nucleus PSO J030947.49+271757.31 from a deep Chandra X-ray observation (128 k…
Constraining the shear acceleration model for the X-ray emission of large-scale extragalactic jets
F. Tavecchio
The nature of the intense X-ray emission from powerful extragalactic jets at large ( kpc) scale is still debated. The scenario that invokes the inverse Compton scattering of th…
Kink-driven magnetic reconnection in relativistic jets: consequences for X-ray polarimetry of BL Lacs
Gianluigi Bodo, Fabrizo Tavecchio, Lorenzo Sironi
We investigate with relativistic MHD simulations the dissipation physics of BL Lac jets, by studying the synchrotron polarization signatures of particles accelerated by the kink in…
On the radiation energy density in the jet of high-energy emitting BL Lac objects and its impact on their multi-messenger role
F. Tavecchio, F. Oikonomou, C. Righi
We examine the potential multi-messenger role of BL Lac objects emitting at high energy (so-called HBL) focusing on the limits on the energy density of soft radiation in the jet fr…
On the radio and GeV-TeV gamma-ray emission connection in Fermi blazars
R. Lico, M. Giroletti, M. Orienti +4
The Fermi-LAT revealed that the census of the gamma-ray sky is dominated by blazars. Looking for a possible connection between radio and gamma-ray emission is a central issue for u…
Extreme BL Lacs: probes for cosmology and UHECR candidates
F. Tavecchio, G. Bonnoli
High-energy observations of extreme BL Lac objects, such as 1ES0229+200 or 1ES 0347-121, recently focused interest both for blazar and jet physics and for the implication on the ex…
Unveiling the nature of the gamma-ray emitting AGN PKS 0521-36
F. D'Ammando, M. Orienti, F. Tavecchio +11
PKS 0521-36 is an Active Galactic Nucleus (AGN) with uncertain classification. We investigate the properties of this source from radio to gamma rays. The broad emission lines in th…
The innermost regions of relativistic jets and their magnetic fields in radio-loud Active Galactic Nuclei
I. Donnarumma, I. Agudo, L. Costamante +17
This is a White Paper in support of the mission concept of the Large Observatory for X-ray Timing (LOFT), proposed as a medium-sized ESA mission. We discuss the potential of LOFT f…
The jet of the BL Lac object PKS 0521 -365 in the near-IR : MAD adaptive optics observations
R. Falomo, E. Pian, A. Treves +12
BL Lac objects are low--power active nuclei exhibiting a variety of peculiar properties that are caused by the presence of a relativistic jet and orientation effects. We present he…