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

被引：52

作者：

Bonnoli, G. ^{[1
]}

Tavecchio, F. ^{[1
]}

Ghisellini, G. ^{[1
]}

Sbarrato, T. ^{[1
,2
]}

机构：

[1] INAF Osservatorio Astron Brera, I-23807 Merate, Italy

[2] Univ Milano Bicocca, Dipartimento Fis G Occhialini, I-20126 Milan, Italy

来源：

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | 2015年 / 451卷 / 01期

关键词：

radiation mechanisms: non-thermal; galaxies: active; galaxies: jets; gamma-rays: galaxies; MICROWAVE BACKGROUND-RADIATION; SPECTRAL ENERGY-DISTRIBUTIONS; BLAZAR 1ES 0229+200; GAMMA-RAY EMISSION; TEV BLAZARS; LACERTAE OBJECTS; AREA TELESCOPE; DATA RELEASE; SWIFT; CONSTRAINTS;

D O I：

10.1093/mnras/stv953

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

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.

引用

页码：611 / 621

页数：11

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