HAWC Detection of a TeV Halo Candidate Surrounding a Radio-quiet Pulsar

HAWC Collaboration; Albert, A.; Alfaro, R.; Arteaga-Velazquez, J. C.; Ayala Solares, H. A.; Belmont-Moreno, E.; Capistran, T.; Carraminana, A.; Casanova, S.; Cotzomi, J.; Coutino De Leon, S.; De la Fuente, E.; de Leon, C.; Diaz Hernandez, R.; DuVernois, M. A.; Diaz-Velez, J. C.; Espinoza, C.; Fan, K. L.; Fraija, N.; Fang, K.; Garcia-Gonzalez, J. A.; Garfias, F.; Jardin-Blicq, A.; Gonzalez, M. M.; Goodman, J. A.; Harding, J. P.; Hernandez, S.; Huang, D.; Hueyotl-Zahuantitla, F.; Huntemeyer, P.; Iriarte, A.; Joshi, V.; Lara, A.; Lee, J.; Leon Vargas, H.; Linnemann, J. T.; Longinotti, A. L.; Luis-Raya, G.; Malone, K.; Martinez, O.; Martinez-Castro, J.; Matthews, J. A.; Morales-Soto, J. A.; Moreno, E.; Mostafa, M.; Nayerhoda, A.; Nellen, L.; Newbold, M.; Nisa, M. U.; Perez Araujo, Y.; Son, Y.; Perez-Perez, E. G.; Rho, C. D.; Rosa-Gonzalez, D.; Sandoval, A.; Schneider, M.; Serna-Franco, J.; Smith, A. J.; Springer, R. W.; Tollefson, K.; Torres, I.; Torres-Escobedo, R.; Wang, X.; Whitaker, K.; Willox, E.; Zhou, H.

doi:10.3847/2041-8213/acb5ee

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HAWC Detection of a TeV Halo Candidate Surrounding a Radio-quiet Pulsar

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Jardin-Blicq, A.
Division Prof. Dr. James A. Hinton, MPI for Nuclear Physics, Max Planck Society;

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https://iopscience.iop.org/article/10.3847/2041-8213/acb5ee/pdf
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HAWC Collaboration, Albert, A., Alfaro, R., Arteaga-Velazquez, J. C., Ayala Solares, H. A., Belmont-Moreno, E., et al. (2023). HAWC Detection of a TeV Halo Candidate Surrounding a Radio-quiet Pulsar. Astrophysical Journal, Letters, 944(2): L29. doi:10.3847/2041-8213/acb5ee.

Cite as: https://hdl.handle.net/21.11116/0000-000D-A075-A

Abstract

Extended very-high-energy (VHE; 0.1–100 TeV) γ-ray emission has been observed around several middle-aged pulsars and referred to as "TeV halos." Their formation mechanism remains under debate. It is also unknown whether they are ubiquitous or related to a certain subgroup of pulsars. With 2321 days of observation, the High Altitude Water Cherenkov (HAWC) Gamma-Ray Observatory detected VHE γ-ray emission at the location of the radio-quiet pulsar PSR J0359+5414 with >6σ significance. By performing likelihood tests with different spectral and spatial models and comparing the TeV spectrum with multiwavelength observations of nearby sources, we show that this excess is consistent with a TeV halo associated with PSR J0359+5414, though future observation of HAWC and multiwavelength follow-ups are needed to confirm this nature. This new halo candidate is located in a noncrowded region in the outer galaxy. It shares similar properties to the other halos but its pulsar is younger and radio-quiet. Our observation implies that TeV halos could commonly exist around pulsars and their formation does not depend on the configuration of the pulsar magnetosphere.