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

Albert, A. and Alfaro, R. and Arteaga-Velázquez, J. C. and Ayala Solares, H. A. and Belmont-Moreno, E. and Capistrán, T. and Carramiñana, A. and Casanova, S. and Cotzomi, J. and De León, S. Coutiño and Fuente, E. De la and de León, C. and Diaz Hernandez, R. and DuVernois, M. A. and Díaz-Vélez, J. C. and Espinoza, C. and Fan, K. L. and Fraija, N. and Fang, K. and García-González, J. A. and Garfias, F. and Jardin-Blicq, A. and González, M. M. and Goodman, J. A. and Harding, J. P. and Hernandez, S. and Huang, D. and Hueyotl-Zahuantitla, F. and Hüntemeyer, P. and Iriarte, A. and Joshi, V. and Lara, A. and Lee, J. and Vargas, H. León and Linnemann, J. T. and Longinotti, A. L. and Luis-Raya, G. and Malone, K. and Martinez, O. and Martínez-Castro, J. and Matthews, J. A. and Morales-Soto, J. A. and Moreno, E. and Mostafá, M. and Nayerhoda, A. and Nellen, L. and Newbold, M. and Nisa, M. U. and Araujo, Y. Pérez and Son, Y. and Pérez-Pérez, E. G. and Rho, C. D. and Rosa-González, D. and Sandoval, A. and Schneider, M. and Serna-Franco, J. and Smith, A. J. and Springer, R. W. and Tollefson, K. and Torres, I. and Torres-Escobedo, R. and Wang, X. and Whitaker, K. and Willox, E. and Zhou, H. (2023) HAWC Detection of a TeV Halo Candidate Surrounding a Radio-quiet Pulsar. The Astrophysical Journal Letters, 944 (2). L29. ISSN 2041-8205

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Official URL: https://doi.org/10.3847/2041-8213/acb5ee

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.

Item Type:	Article
Subjects:	Open Library Press > Physics and Astronomy
Depositing User:	Unnamed user with email support@openlibrarypress.com
Date Deposited:	18 Apr 2023 05:42
Last Modified:	18 Apr 2023 05:42
URI:	https://openlibrarypress.com/id/eprint/1059

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