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Title:Prospects for a survey of the galactic plane with the Cherenkov Telescope Array
Authors:ID Abe, K. (Author)
ID Bhattacharyya, Saptashwa (Author)
ID Pérez Romero, Judit (Author)
ID Stanič, Samo (Author)
ID Vodeb, Veronika (Author)
ID Vorobiov, Serguei (Author)
ID Zaharijas, Gabrijela (Author)
ID Zavrtanik, Danilo (Author)
ID Zavrtanik, Marko (Author)
ID Živec, Miha (Author)
Files:URL https://iopscience.iop.org/article/10.1088/1475-7516/2024/10/081
 
.pdf Abe_2024_J._Cosmol._Astropart._Phys._2024_081.pdf (4,26 MB)
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URL https://iopscience.iop.org/article/10.1088/1475-7516/2024/10/081
 
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Language:English
Work type:Unknown
Typology:1.01 - Original Scientific Article
Organization:UNG - University of Nova Gorica
Abstract:Approximately one hundred sources of very-high-energy (VHE) gamma rays are known in the Milky Way, detected with a combination of targeted observations and surveys. A survey of the entire Galactic Plane in the energy range from a few tens of GeV to a few hundred TeV has been proposed as a Key Science Project for the upcoming Cherenkov Telescope Array Observatory (CTAO). This article presents the status of the studies towards the Galactic Plane Survey (GPS). We build and make publicly available a sky model that combines data from recent observations of known gamma-ray emitters with state-of-the-art physically-driven models of synthetic populations of the three main classes of established Galactic VHE sources (pulsar wind nebulae, young and interacting supernova remnants, and compact binary systems), as well as of interstellar emission from cosmic-ray interactions in the Milky Way. We also perform an optimisation of the observation strategy (pointing pattern and scheduling) based on recent estimations of the instrument performance. We use the improved sky model and observation strategy to simulate GPS data corresponding to a total observation time of 1620 hours spread over ten years. Data are then analysed using the methods and software tools under development for real data. Under our model assumptions and for the realisation considered, we show that the GPS has the potential to increase the number of known Galactic VHE emitters by almost a factor of five. This corresponds to the detection of more than two hundred pulsar wind nebulae and a few tens of supernova remnants at average integral fluxes one order of magnitude lower than in the existing sample above 1 TeV, therefore opening the possibility to perform unprecedented population studies. The GPS also has the potential to provide new VHE detections of binary systems and pulsars, to confirm the existence of a hypothetical population of gamma-ray pulsars with an additional TeV emission component, and to detect bright sources capable of accelerating particles to PeV energies (PeVatrons). Furthermore, the GPS will constitute a pathfinder for deeper follow-up observations of these source classes. Finally, we show that we can extract from GPS data an estimate of the contribution to diffuse emission from unresolved sources, and that there are good prospects of detecting interstellar emission and statistically distinguishing different scenarios. Thus, a survey of the entire Galactic plane carried out from both hemispheres with CTAO will ensure a transformational advance in our knowledge of Galactic VHE source populations and interstellar emission.
Keywords:very-high-energy gamma rays, Cherenkov Telescope Array Observatory, CTAO Galactic Plane Survey, galactic cosmic rays, pulsar wind nebulae, supernova remnants, galactic PeVatrons, binary systems, diffuse emission
Publication status:Published
Publication version:Version of Record
Publication date:01.10.2024
Year of publishing:2024
Number of pages:str. 1-68
Numbering:Vol. 2024, no. 10, [article no.] 081
PID:20.500.12556/RUNG-9435 New window
COBISS.SI-ID:213077507 New window
UDC:52
ISSN on article:1475-7516
DOI:10.1088/1475-7516/2024/10/081 New window
NUK URN:URN:SI:UNG:REP:WJOKA60O
Publication date in RUNG:28.10.2024
Views:891
Downloads:4
Metadata:XML DC-XML DC-RDF
:
ABE, K., BHATTACHARYYA, Saptashwa, PÉREZ ROMERO, Judit, STANIČ, Samo, VODEB, Veronika, VOROBIOV, Serguei, ZAHARIJAS, Gabrijela, ZAVRTANIK, Danilo, ZAVRTANIK, Marko and ŽIVEC, Miha, 2024, Prospects for a survey of the galactic plane with the Cherenkov Telescope Array. Journal of cosmology and astroparticle physics [online]. 2024. Vol. 2024, no. 10,  081, p. 1–68. [Accessed 7 April 2025]. DOI 10.1088/1475-7516/2024/10/081. Retrieved from: https://repozitorij.ung.si/IzpisGradiva.php?lang=eng&id=9435
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Record is a part of a journal

Title:Journal of cosmology and astroparticle physics
Publisher:Institute of Physics Pub.
ISSN:1475-7516
COBISS.SI-ID:389627 New window

Document is financed by a project

Funder:ARIS - Slovenian Research and Innovation Agency
Funding programme:Raziskovalni program
Project number:P1-0031
Name:Večglasniška astrofizika
Funder:ARIS - Slovenian Research and Innovation Agency
Funding programme:Raziskovalni program
Project number:P1-0385
Name:Daljinsko zaznavanje atmosferskih lastnosti
Funder:ARIS - Slovenian Research and Innovation Agency
Funding programme:Raziskovalni in infrastrukturni programi ARIS
Project number:I0-0033
Name:Infrastrukturni program Univerze v Novi Goric
Funder:ARIS - Slovenian Research and Innovation Agency
Funding programme:Raziskovalni projekt
Project number:J1-9146
Name:Novi detektorji in tehnike daljinskega zaznavanja atmosferskih lastnosti za polja Čerenkovih teleskopov
Funder:ARIS - Slovenian Research and Innovation Agency
Funding programme:Raziskovalni projekt
Project number:J1-1700
Name:Priprava na iskanje temne snovi z observatorijem Cherenkov Telescope Array z uporabo strojnega ucenja
Funder:ARIS - Slovenian Research and Innovation Agency
Funding programme:Raziskovalni projekt
Project number:N1-0111
Name:Identifikacija izvorov kozmičnih žarkov med aktivnimi galaksijami s curki
Funder:ARIS - Slovenian Research and Innovation Agency
Project number:I0-E018
Name:Izvajanje mednarodnega infrastrukturnega projekta CTA
Funder:ARIS - Slovenian Research and Innovation Agency
Project number:J1-3011
Name:Daljinsko zaznavanje atmosfere na observatoriju Cherenkov Telescope Array in njen vpliv na opazovanje visokoenergijskih kozmičnih gama žarkov

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License:CC BY 4.0, Creative Commons Attribution 4.0 International
Link:http://creativecommons.org/licenses/by/4.0/
Description:This is the standard Creative Commons license that gives others maximum freedom to do what they want with the work as long as they credit the author.

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