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Search for gamma-ray emission from the sun during solar minimum with the argo-ybj experiment

文献类型:期刊论文

AuthorBartoli,B.1,2; Bernardini,P.3,4; Bi,X. J.5,6; Cao,Z.5,6; Catalanotti,S.1,2; Chen,S. Z.5; Chen,T. L.7; Cui,S. W.8; Dai,B. Z.9; D’Amone,A.3,4
SourceThe astrophysical journal
Issued Date2019-02-19
Volume872Issue:2
ISSN0004-637X
KeywordAstroparticle physics Cosmic rays Gamma rays: general Sun: general
DOI10.3847/1538-4357/aafe06
English AbstractAbstract the hadronic interaction of cosmic rays with solar atmosphere can produce high energy gamma-rays. the gamma-ray luminosity is correlated both with the flux of primary cosmic rays and the intensity of the solar magnetic field. the gamma-rays below 200 gev have been observed by fermi without any evident energy cutoff. the bright gamma-ray flux above 100 gev has been detected only during solar minimum. the only available data in the tev range come from the hawc observations, however, outside the solar minimum. the argo-ybj data set has been used to search for sub-tev/tev gamma-rays from the sun during the solar minimum from 2008 to 2010, the same time period covered by the fermi data. a suitable model containing the sun shadow, solar disk emission, and inverse-compton emission has been developed, and the chi-square minimization method was used to quantitatively estimate the disk gamma-ray signal. the result shows that no significant gamma-ray signal is detected and upper limits to the gamma-ray flux at 0.3–7 tev are set at the 95% confidence level. in the low energy range these limits are consistent with the extrapolation of the fermi-lat measurements taken during solar minimum and are compatible with a softening of the gamma-ray spectrum below 1 tev. they also provide an experimental upper bound to any solar disk emission at tev energies. models of dark matter annihilation via long-lived mediators predicting gamma-ray fluxes >10?7 gev cm?2 s?1 below 1 tev are ruled out by the argo-ybj limits.
Language英语
WOS IDIOP:0004-637X-872-2-AAFE06
PublisherThe American Astronomical Society
URIhttp://www.irgrid.ac.cn/handle/1471x/2175733
Collection高能物理研究所
Affiliation1.Dipartimento di Fisica dell’Università di Napoli “Federico II”, Complesso Universitario di Monte Sant’Angelo, via Cinthia, I-80126 Napoli, Italy dettorre@na.infn.it
2.Istituto Nazionale di Fisica Nucleare, Sezione di Napoli, Complesso Universitario di Monte Sant’Angelo, via Cinthia, I-80126 Napoli, Italy
3.Dipartimento Matematica e Fisica “Ennio De Giorgi”, Università del Salento, via per Arnesano, I-73100 Lecce, Italy
4.Istituto Nazionale di Fisica Nucleare, Sezione di Lecce, via per Arnesano, I-73100 Lecce, Italy
5.Key Laboratory of Particle Astrophysics, Institute of High Energy Physics, Chinese Academy of Sciences, P. O. Box 918, 100049 Beijing, People’s Republic of China; lizhe@ihep.ac.cn, chensz@ihep.ac.cn, hhh@ihep.ac.cn
6.School of Physical Sciences, University of Chinese Academy of Sciences, 100049 Beijing, People's Republic of China
7.Tibet University, 850000 Lhasa, Xizang, People’s Republic of China
8.Hebei Normal University, 050024, Shijiazhuang Hebei, People’s Republic of China
9.Yunnan University, 2 North Cuihu Road, 650091 Kunming, Yunnan, People’s Republic of China
10.Gran Sasso Science Institute(GSSI), Via Iacobucci 2, I-67100 L’Aquila, Italy
Recommended Citation
GB/T 7714
Bartoli,B.,Bernardini,P.,Bi,X. J.,et al. Search for gamma-ray emission from the sun during solar minimum with the argo-ybj experiment[J]. The astrophysical journal,2019,872(2).
APA Bartoli,B..,Bernardini,P..,Bi,X. J..,Cao,Z..,Catalanotti,S..,...&Zhu,Q. Q..(2019).Search for gamma-ray emission from the sun during solar minimum with the argo-ybj experiment.The astrophysical journal,872(2).
MLA Bartoli,B.,et al."Search for gamma-ray emission from the sun during solar minimum with the argo-ybj experiment".The astrophysical journal 872.2(2019).

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