HAWC J2227+610: a potential PeVatron candidate for the CTA in the northern hemisphere
(2022) 37th International Cosmic Ray Conference In Proceedings of Science 395.- 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 hemisphere. 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... (More)
- 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 hemisphere. 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. Different 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 cutoff. © Copyright owned by the author(s) under the terms of the Creative Commons. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/f692bf11-49c0-447c-9f07-feed24815dc9
- author
- Verna, Gaia ; Cassol, Franca ; Costantini, Heide ; Abdalla, H. ; Carlile, C. LU ; Dravins, D. LU and Zmija, A.
- author collaboration
- organization
- publishing date
- 2022
- type
- Chapter in Book/Report/Conference proceeding
- publication status
- published
- subject
- keywords
- Clouds, Cosmic rays, Cosmology, Gamma rays, Pulsars, Telescopes, Tellurium compounds, 'current, Cherenkov telescope arrays, Gamma ray sources, Gamma-ray emission, Hadronic models, Hadronics, High energy gamma rays, Molecular clouds, Northern Hemispheres, Very high energies, Morphology
- host publication
- 37th International Cosmic Ray Conference (ICRC2021) - GAI - Gamma Ray Indirect
- series title
- Proceedings of Science
- volume
- 395
- article number
- 904
- conference name
- 37th International Cosmic Ray Conference
- conference location
- Berlin, Germany
- conference dates
- 2021-07-12 - 2021-07-23
- external identifiers
-
- scopus:85145018821
- ISSN
- 1824-8039
- DOI
- 10.22323/1.395.0904
- language
- English
- LU publication?
- yes
- id
- f692bf11-49c0-447c-9f07-feed24815dc9
- date added to LUP
- 2023-01-16 13:31:13
- date last changed
- 2023-01-16 13:31:13
@inproceedings{f692bf11-49c0-447c-9f07-feed24815dc9, 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 hemisphere. 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. Different 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 cutoff. © Copyright owned by the author(s) under the terms of the Creative Commons.}}, author = {{Verna, Gaia and Cassol, Franca and Costantini, Heide and Abdalla, H. and Carlile, C. and Dravins, D. and Zmija, A.}}, booktitle = {{37th International Cosmic Ray Conference (ICRC2021) - GAI - Gamma Ray Indirect}}, issn = {{1824-8039}}, keywords = {{Clouds; Cosmic rays; Cosmology; Gamma rays; Pulsars; Telescopes; Tellurium compounds; 'current; Cherenkov telescope arrays; Gamma ray sources; Gamma-ray emission; Hadronic models; Hadronics; High energy gamma rays; Molecular clouds; Northern Hemispheres; Very high energies; Morphology}}, language = {{eng}}, series = {{Proceedings of Science}}, title = {{HAWC J2227+610: a potential PeVatron candidate for the CTA in the northern hemisphere}}, url = {{http://dx.doi.org/10.22323/1.395.0904}}, doi = {{10.22323/1.395.0904}}, volume = {{395}}, year = {{2022}}, }