Extreme BL Lacs: probes for cosmology and UHECR candidates

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 extragalactic background light and intergalactic magnetic field estimate. Moreover, their enigmatic properties have been i...

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Autores principales: Tavecchio, Fabrizio, Bonnoli, Giacomo
Formato: Objeto de conferencia
Lenguaje:Inglés
Publicado: 2015
Materias:
Ciencias Astronómicas
BL Lac objects
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/168049
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-168049
record_format dspace
spelling I19-R120-10915-1680492024-07-22T20:01:57Z http://sedici.unlp.edu.ar/handle/10915/168049 Extreme BL Lacs: probes for cosmology and UHECR candidates Tavecchio, Fabrizio Bonnoli, Giacomo 2015-10 2016 2024-07-22T17:12:17Z en Ciencias Astronómicas BL Lac objects 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 extragalactic background light and intergalactic magnetic field estimate. Moreover, their enigmatic properties have been interpreted in a scenario in which their primary highenergy output is through a beam of high-energy hadrons. However, despite their possible important role in all these topics, 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 considering those undetected (or only barely detected) by the LAT onboard Fermi and characterized by a high X-ray versus radio flux ratio. We assembled the multi-wavelength spectral energy distribution of the resulting 9 sources, using available archival data of 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 CTA. Facultad de Ciencias Astronómicas y Geofísicas Objeto de conferencia Objeto de conferencia http://creativecommons.org/licenses/by-nc-sa/4.0/ Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0) application/pdf 111-116
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Ciencias Astronómicas
BL Lac objects
spellingShingle Ciencias Astronómicas
BL Lac objects
Tavecchio, Fabrizio
Bonnoli, Giacomo
Extreme BL Lacs: probes for cosmology and UHECR candidates
topic_facet Ciencias Astronómicas
BL Lac objects
description 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 extragalactic background light and intergalactic magnetic field estimate. Moreover, their enigmatic properties have been interpreted in a scenario in which their primary highenergy output is through a beam of high-energy hadrons. However, despite their possible important role in all these topics, 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 considering those undetected (or only barely detected) by the LAT onboard Fermi and characterized by a high X-ray versus radio flux ratio. We assembled the multi-wavelength spectral energy distribution of the resulting 9 sources, using available archival data of 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 CTA.
format Objeto de conferencia
Objeto de conferencia
author Tavecchio, Fabrizio
Bonnoli, Giacomo
author_facet Tavecchio, Fabrizio
Bonnoli, Giacomo
author_sort Tavecchio, Fabrizio
title Extreme BL Lacs: probes for cosmology and UHECR candidates
title_short Extreme BL Lacs: probes for cosmology and UHECR candidates
title_full Extreme BL Lacs: probes for cosmology and UHECR candidates
title_fullStr Extreme BL Lacs: probes for cosmology and UHECR candidates
title_full_unstemmed Extreme BL Lacs: probes for cosmology and UHECR candidates
title_sort extreme bl lacs: probes for cosmology and uhecr candidates
publishDate 2015
url http://sedici.unlp.edu.ar/handle/10915/168049
work_keys_str_mv AT tavecchiofabrizio extremebllacsprobesforcosmologyanduhecrcandidates
AT bonnoligiacomo extremebllacsprobesforcosmologyanduhecrcandidates
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