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Record |
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Author  |
HAWC Collaboration (Alfaro, R. et al); Coutiño de Leon, S. |
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Title |
Study of the IC 443 Region with the HAWC Observatory |
Type |
Journal Article |
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Year |
2025 |
Publication |
Astrophysical Journal |
Abbreviated Journal |
Astrophys. J. |
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Volume |
992 |
Issue |
1 |
Pages |
22 - 16pp |
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Abstract |
Supernova remnants are one potential source class considered a PeVatron (i.e., capable of accelerating cosmic rays above PeV energies). The shock fronts produced after the explosion of the supernova are ideal regions for particle acceleration. IC 443 is a supernova remnant that has been studied extensively at different wavelengths. Using 2966 days of gamma-ray data from the High Altitude Water Cherenkov (HAWC) observatory, we study the emission of IC 443 with the objective of finding signatures of cosmic-ray acceleration at the PeV scale. Using a maximum likelihood method, we find a point source located at (alpha = 94 .degrees 42, delta = 22 .degrees 35) that we associate with IC 443. The measured spectrum is a simple power law with an index of -3.14 +/- 0.18, which is consistent with previous TeV observations. Although we cannot confirm that IC 443 is a hadronic PeVatron, we do not find any sign that the spectrum has a cutoff at tens of TeV energies, with the spectrum extending to similar to 30 TeV. Furthermore, we also find a new extended component in the region whose emission is described by a simple power law with an index of -2.49 +/- 0.08 and which we call HAWC J0615+2213. While we show evidence that this new source might be a new TeV halo, we defer a detailed analysis of this new source to another publication. |
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Address |
[Alfaro, R.; Avila Rojas, D.; Espinoza, C.; Leon Vargas, H.; Perez Araujo, Y.; Sandoval, A.; Serna-Franco, J.] Univ Nacl Autonoma Mexico, Inst Fis, Mexico City, DF, Mexico, Email: hgayala@psu.edu |
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Publisher |
IOP Publishing Ltd |
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Language |
English |
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Original Title |
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Series Volume |
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Series Issue |
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Edition |
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ISSN |
0004-637x |
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Notes |
WOS:001585178700001 |
Approved |
no |
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Is ISI |
yes |
International Collaboration |
yes |
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Call Number |
IFIC @ pastor @ |
Serial |
6878 |
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