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Title:HAWC J2227+610: a potential PeVatron candidate for the CTA in the northern hemisphere
Authors:ID Verna, Gaia (Author)
ID Bhattacharyya, Saptashwa (Author)
ID MARČUN, Barbara (Author)
ID Pérez Romero, Judit (Author)
ID Stanič, Samo (Author)
ID Vodeb, Veronika (Author)
ID Vorobiov, Serguei (Author)
ID Zaharijas, Gabrijela (Author)
ID Zavrtanik, Marko (Author)
ID Zavrtanik, Danilo (Author)
ID Živec, Miha (Author), et al.
Files:.pdf ICRC2021_904.pdf (2,17 MB)
MD5: C9174375879281199BFE10178B8F6308
 
URL https://pos.sissa.it/395/
 
URL https://pos.sissa.it/395/904/pdf
 
Language:English
Work type:Not categorized
Typology:1.08 - Published Scientific Conference Contribution
Organization:UNG - University of Nova Gorica
Abstract:Recent observations of the gamma-ray source HAWC J2227+610 by Tibet AS+MD and LHAASO confirm the special interest of this source as a galactic PeVatron candidate in the northern hemi-sphere. HAWC J2227+610 emits Very High Energy (VHE) gamma-rays up to 500 TeV, from a region coincident with molecular clouds and significantly displaced from the nearby pulsar J2229+6114. Even if this morphology favours an hadronic origin, both leptonic or hadronic models can describe the current VHE gamma-ray emission. The morphology of the source is not well constrained by the present measurements and a better characterisation would greatly help the understanding of the underlying particle acceleration mechanisms. The Cherenkov Telescope Array (CTA) will be the future most sensitive Imaging Atmospheric Cherenkov Telescope and, thanks to its unprecedented angular resolution, could contribute to better constrain the nature of this source. The present work investigates the potentiality of CTA to study the morphology and the spectrum of HAWC J2227+610. For this aim, the source is simulated assuming the hadronic model proposed by the Tibet AS+MD collaboration, recently fitted on multi-wavelength data, and two spatial templates associated to the source nearby molecular clouds. Di˙erent CTA layouts and observation times are considered. A 3D map based analysis shows that CTA is able to significantly detect the extension of the source and to attribute higher detection significance to the simulated molecular cloud template compared to the alternative one. CTA data does not allow to disentangle the hadronic and the leptonic emission models. However, it permits to correctly reproduce the simulated parent proton spectrum characterized by a ∼ 500 TeV cuto˙.
Keywords:Cherenkov Telescope Array, HAWC J2227+610, very-high-energy gamma-rays
Publication status:Published
Year of publishing:2021
PID:20.500.12556/RUNG-8435 New window
COBISS.SI-ID:164927747 New window
NUK URN:URN:SI:UNG:REP:I9Z4PYCH
Publication date in RUNG:19.09.2023
Views:620
Downloads:4
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Record is a part of a monograph

Title:37th International Cosmic Ray Conference : ICRC2021
Place of publishing:Trst, Italija
Year of publishing:2021

Document is financed by a project

Funder:ARRS - Slovenian Research Agency
Project number:P1-0031
Name:Večglasniška astrofizika

Licences

License:CC BY-NC-ND 4.0, Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International
Link:http://creativecommons.org/licenses/by-nc-nd/4.0/
Description:The most restrictive Creative Commons license. This only allows people to download and share the work for no commercial gain and for no other purposes.

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