2023ApJ...954..200A

Query : 2023ApJ...954..200A

2023ApJ...954..200A - Astrophys. J., 954, 200 (2023/September-2)

Observation of Gamma Rays up to 320 TeV from the Middle-aged TeV Pulsar Wind Nebula HESS J1849-000.

AMENOMORI M., ASANO S., BAO Y.W., BI X.J., CHEN D., CHEN T.L., CHEN W.Y., CHEN X., CHEN Y., CIRENNIMA, CUI S.W., DANZENGLUOBU, DING L.K., FANG J.H., FANG K., FENG C.F., FENG Z., FENG Z.Y., GAO Q., GOMI A., GOU Q.B., GUO Y.Q., GUO Y.Y., HAYASHI Y., HE H.H., HE Z.T., HIBINO K., HOTTA N., HU H., HU H.B., HU K.Y., HUANG J., JIA H.Y., JIANG L., JIANG P., JIN H.B., KASAHARA K., KATAYOSE Y., KATO C., KATO S., KAWAHARA I., KAWASHIMA T., KAWATA K., KOZAI M., KURASHIGE D., LABACIREN, LE G.M., LI A.F., LI H.J., LI W.J., LI Y., LIN Y.H., LIU B., LIU C., LIU J.S., LIU L.Y., LIU M.Y., LIU W., LU H., MENG X.R., MENG Y., MUNAKATA K., NAGAYA K., NAKAMURA Y., NAKAZAWA Y., NANJO H., NING C.C., NISHIZAWA M., NOGUCHI R., OHNISHI M., OKUKAWA S., OZAWA S., QIAN X., QIAN X.L., QU X.B., SAITO T., SAKAKIBARA Y., SAKATA M., SAKO T., SAKO T.K., SASAKI T., SHAO J., SHIBATA M., SHIOMI A., SUGIMOTO H., TAKANO W., TAKITA M., TAN Y.H., TATEYAMA N., TORII S., TSUCHIYA H., UDO S., WANG H., WANG S.F., WANG Y.P., WANGDUI, WU H.R., WU Q., XU J.L., XUE L., YANG Z., YAO Y.Q., YIN J., YOKOE Y., YU Y.L., YUAN A.F., ZHAI L.M., ZHANG H.M., ZHANG J.L., ZHANG X., ZHANG X.Y., ZHANG Y., ZHANG Y., ZHANG Y., ZHAO S.P., ZHAXISANGZHU, ZHOU X.X. and ZOU Y.H.

Abstract (from CDS):

Gamma rays from HESS J1849-000, a middle-aged TeV pulsar wind nebula (PWN), are observed by the Tibet air shower array and the muon detector array. The detection significance of gamma rays reaches 4.0σ and 4.4σ levels above 25 TeV and 100 TeV, respectively, in units of the Gaussian standard deviation σ. The energy spectrum measured between 40 TeV < E < 320 TeV for the first time is described with a simple power-law function of ${dN}/{dE}={(2.86\pm 1.44)\times {10}^{-16}(E/40\,\mathrm{TeV})}^{-2.24\pm 0.41}\,{\mathrm{TeV}}^{-1}\,{\mathrm{cm}}^{-2}\,{{\rm{s}}}^{-1}$. The gamma-ray energy spectrum from the sub-TeV (E < 1 TeV) to sub-PeV (100 TeV < E < 1 PeV) ranges, including the results of previous studies, can be modeled with the leptonic scenario, i.e., inverse Compton scattering by high-energy electrons accelerated by the PWN of PSR J1849-0001. On the other hand, the gamma-ray energy spectrum can also be modeled with the hadronic scenario in which gamma rays are generated from the decay of neutral pions produced by collisions between accelerated cosmic-ray protons and the ambient molecular cloud found in the gamma-ray-emitting region. The cutoff energy of cosmic-ray protons Ep,cut is estimated as ${\mathrm{log}}_{10}({E}_{{\rm{p}},\mathrm{cut}}/\mathrm{TeV})={3.73}_{-0.66}^{+2.98}$, suggesting that protons are accelerated up to the PeV energy range. Our study thus proposes that HESS J1849-000 should be further investigated as a new candidate as a Galactic PeV cosmic-ray accelerator, or “PeVatron.”

Abstract Copyright: © 2023. The Author(s). Published by the American Astronomical Society.

Journal keyword(s): Galactic cosmic rays - Pulsar wind nebulae - Gamma-ray sources - Gamma-ray astronomy - Gamma-ray observatories

Simbad objects: 6

goto Full paper

goto View the references in ADS

Number of rows : 6
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 M 1 SNR 05 34 31.8 +22 01 03           ~ 6516 1
2 V* CM Tau Psr 05 34 31.9474694616 +22 00 52.153698024           ~ 5476 0
3 LHAASO J1849-0003 gam 18 49.0 -00 03           ~ 9 0
4 PSR J1849-0001 Psr 18 49 01.83 -00 01 19.1           ~ 76 0
5 eHWC J1850+001 gam 18 50 +00.1           ~ 2 0
6 HESS J1852-000 gam 18 52 +00.0           ~ 15 0

To bookmark this query, right click on this link: simbad:objects in 2023ApJ...954..200A and select 'bookmark this link' or equivalent in the popup menu