High-energy observations of extreme BL Lac objects, such as 1ES 0229+200 or 1ES 0347-121, recently focused interest both for blazar and jet physics and for the implication on the extragalactic background light and intergalactic magnetic field estimate. However, the number of these extreme highly peaked BL Lac objects (EHBL) is still rather small. Aiming at increase their number, we selected a group of EHBL candidates starting from the BL Lac sample of Plotkin et al. (2011), considering those undetected (or only barely detected) by the Large Area Telescope onboard Fermi and characterized by a high X-ray versus radio flux ratio. We assembled the multiwavelength spectral energy distribution of the resulting nine sources, profiting of publicly available archival observations performed by Swift, GALEX, and Fermi satellites, confirming their nature. Through a simple one-zone synchrotron self- Compton model we estimate the expected very high energy flux, finding that in the majority of cases it is within the reach of present generation of Cherenkov arrays or of the forthcoming Cherenkov Telescope Array.

Bonnoli, G., Tavecchio, F., Ghisellini, G., Sbarrato, T. (2015). An emerging population of BL Lacs with extreme properties: Towards a class of EBL and cosmic magnetic field probes?. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 451(1), 611-621 [10.1093/mnras/stv953].

An emerging population of BL Lacs with extreme properties: Towards a class of EBL and cosmic magnetic field probes?

GHISELLINI, GABRIELE
Penultimo
;
SBARRATO, TULLIA
Ultimo
2015

Abstract

High-energy observations of extreme BL Lac objects, such as 1ES 0229+200 or 1ES 0347-121, recently focused interest both for blazar and jet physics and for the implication on the extragalactic background light and intergalactic magnetic field estimate. However, the number of these extreme highly peaked BL Lac objects (EHBL) is still rather small. Aiming at increase their number, we selected a group of EHBL candidates starting from the BL Lac sample of Plotkin et al. (2011), considering those undetected (or only barely detected) by the Large Area Telescope onboard Fermi and characterized by a high X-ray versus radio flux ratio. We assembled the multiwavelength spectral energy distribution of the resulting nine sources, profiting of publicly available archival observations performed by Swift, GALEX, and Fermi satellites, confirming their nature. Through a simple one-zone synchrotron self- Compton model we estimate the expected very high energy flux, finding that in the majority of cases it is within the reach of present generation of Cherenkov arrays or of the forthcoming Cherenkov Telescope Array.
Articolo in rivista - Articolo scientifico
Galaxies: active; Galaxies: jets; Gamma-rays: galaxies; Radiation mechanisms: non-thermal;
Galaxies: active; Galaxies: jets; Gamma-rays: galaxies; Radiation mechanisms: non-thermal; Space and Planetary Science; Astronomy and Astrophysics
English
2015
451
1
611
621
none
Bonnoli, G., Tavecchio, F., Ghisellini, G., Sbarrato, T. (2015). An emerging population of BL Lacs with extreme properties: Towards a class of EBL and cosmic magnetic field probes?. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 451(1), 611-621 [10.1093/mnras/stv953].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/106869
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