Sensitivity of the Cherenkov telescope array to the detection of intergalactic magnetic fields

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378271%3A_____%2F16%3A00538444" target="_blank" >RIV/68378271:_____/16:00538444 - isvavai.cz</a>

Result on the web

<a href="https://doi.org/10.3847/0004-637X/827/2/147" target="_blank" >https://doi.org/10.3847/0004-637X/827/2/147</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.3847/0004-637X/827/2/147" target="_blank" >10.3847/0004-637X/827/2/147</a>

Result language

angličtina

Original language name

Sensitivity of the Cherenkov telescope array to the detection of intergalactic magnetic fields

Original language description

Very high energy (VHE, energy E greater than or similar to 100 GeV) gamma-rays originating from extragalactic sources undergo pair production with low-energy photons of background radiation fields. These pairs can inverse-Compton-scatter background photons, initiating an electromagnetic cascade. The spatial and temporal structure of this secondary gamma-ray signal is altered as the e(+)e(-) pairs are deflected in an intergalactic magnetic field (IGMF). We investigate how VHE observations with the future Cherenkov Telescope Array, with its high angular resolution and broad energy range, can potentially probe the IGMF. We identify promising sources and simulate gamma-ray spectra over a wide range of values of the IGMF strength and coherence length using the publicly available ELMAG Monte. Carlo code. Combining simulated observations in a joint likelihood approach, we find that current limits on the IGMF can be significantly improved. The projected sensitivity depends strongly on the time a source has been gamma-ray active and on the emitted maximum gamma-ray energy.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

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OECD FORD branch

10303 - Particles and field physics

Project

—

Continuities

—

Publication year

2016

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Astrophysical Journal

ISSN

0004-637X

e-ISSN

—

Volume of the periodical

827

Issue of the periodical within the volume

2

Country of publishing house

US - UNITED STATES

Number of pages

10

Pages from-to

1-10

UT code for WoS article

000384001600059

EID of the result in the Scopus database

2-s2.0-84984689217