Results 21 to 30 of about 18,734,225 (295)

Characteristics of the high-frequency humps in the black hole X-ray binary Swift J1727.8–1613

Astronomy & Astrophysics
We present a detailed timing analysis of the two high-frequency humps observed in the power density spectrum of Swift J1727.8–1613 up to 100 keV, using data from the Hard X-ray Modulation Telescope (Insight-HXMT).
Li Ze-Xi, Zhang Liang, Tao Lian, Yang Zi-Han, Zhao Qing-Chang, Zhao Shu-Jie, Ma Rui-Can, Yang Zi-Xu, Li Pan-Ping, Ma Xiang, Huang Yue, Jia Shu-Mei, Zhang Shuang-Nan, Feng Hua, Qu Jin-Lu, Zhang Shu   +15 more
doaj   +1 more source

Systematic study of the simultaneous events detected by GECAM

Astronomy & Astrophysics
Gravitational-wave high-energy Electromagnetic Counterpart All-sky Monitor (GECAM) is a constellation of all-sky monitors in hard X-ray and gamma-ray bands, primarily observing high-energy transients such as gamma-ray bursts, soft gamma-ray repeaters ...
Ren Yang-Zhao, Zhu Feng-Rong, Xiong Shao-Lin, Zhang Yan-Qiu, Wang Chen-Wei, Liu Jia-Cong, Guo Hao-Xuan, Xiao Shuo, Guo Dong-Ya, An Zheng-Hua, Cai Ce, Feng Pei-Yi, Gao Min, Gong Ke, Huang Yue, Li Bing, Li Xiao-Bo, Li Xin-Qiao, Liu Xiao-Jing, Liu Ya-Qing, Ma Xiang, Peng Wen-Xi, Qiao Rui, Song Li-Ming, Sun Xi-Lei, Tan Wen-Jun, Wang Jin, Wang Jin-Zhou, Wang Ping, Wang Yue, Wen Xiang-Yang, Xie Sheng-Lun, Xue Wang-Chen, Yang Sheng, Yi Qi-Bin, Yu Zheng-Hang, Zhang Da-Li, Zhang Fan, Zhang Hong-Mei, Zhang Jin-Peng, Zhang Peng, Zhang Shuang-Nan, Zhang Wen-Long, Zhang Zhen, Zhao Xiao-Yun, Zhao Yi, Zheng Chao, Zheng Shi-Jie   +47 more
doaj   +1 more source

Fermi-LAT Observation of PSR B1259-63 during Its 2021 Periastron Passage

Universe, 2021
PSR B1259-63 is a γ-ray binary system, where the compact object is a pulsar. The system has an orbital period of 1236.7 days and shows peculiar γ-ray flares (in 100 MeV–300 GeV) after its periastron time.
Zhi Chang, Shu Zhang, Yu-Peng Chen, Long Ji, Ling-Da Kong, Peng-Ju Wang   +5 more
doaj   +1 more source

Axion-like Particles Implications for High-Energy Astrophysics [PDF]

, 2022
We offer a pedagogical introduction to axion-like particles (ALPs) as far as their relevance for high-energy astrophysics is concerned, from a few MeV to 1000 TeV. This review is self-contained, in such a way to be understandable even to non-specialists.
GALANTI, Giorgio, RONCADELLI, MARCO, Marco Roncadelli, Giorgio Galanti   +3 more
core   +1 more source

GECAM discovery of a peculiar magnetar X-ray burst (MXB 221120) from SGR J1935+2154 associated with a fast radio burst

Astronomy & Astrophysics
Fast radio bursts (FRBs) are enigmatic cosmic transients of millisecond duration observed in the radio band. The identification of FRB-associated magnetar X-ray bursts (MXBs) from the galactic magnetar SGR J1935+2154 suggests that at least a fraction of ...
Tan Wen-Jun, Wang Yue, Wang Chen-Wei, Xiong Shao-Lin, Li Xiao-Bo, Zhang Shuang-Nan, Cai Ce, Xue Wang-Chen, Zhang Peng, Wu Bo-Bing, An Zheng-Hua, Gao Ming, Ge Ming-Yu, Gong Ke, Guo Dong-Ya, Guo Hao-Xuan, Hao Long-Fei, Huang Yue, Huang Yu-Xiang, Lee Ke-Jia, Li Bing, Li Kui-Cheng, Li Xin-Qiao, Liu Jia-Cong, Liu Xiao-Jing, Liu Ya-Qing, Ma Xiang, Peng Wen-Xi, Qiao Rui, Ren Yang-Zhao, Song Li-Ming, Sun Xi-Lei, Wang Jin, Wang Jin-Zhou, Wang Ping, Wen Xiang-Yang, Xiao Shuo, Xie Lun-Sheng, Xu Heng, Yang Sheng, Yi Shu-Xu, Yi Qi-bin, Yu Zheng-Hang, Zhang Li-Da, Zhang Fan, Zhang Hong-Mei, Zhang Jin-Peng, Zhang Yan-Qiu, Zhang Zhen, Zhao Xiao-Yun, Zhao Yi, Zheng Chao, Zheng Shi-Jie   +52 more
doaj   +1 more source

DAMA/LIBRA-phase1 results and perspectives of the phase2

EPJ Web of Conferences, 2016
The DAMA/LIBRA experiment (∼ 250 kg of highly radio-pure NaI(Tl)) is running deep underground at the Gran Sasso National Laboratory (LNGS) of the I.N.F.N.
Bernabei R., Belli P., Cappella F., Caracciolo V., Cerulli R., Dai C.J., d'Angelo A., d'Angelo S., Marco A. Di, He H.L., Incicchitti A., Kuang H.H., Ma X.H., Montecchia F., Sheng X.D., Wang R.G., Ye Z.P.   +16 more
doaj   +1 more source

Viscous attenuation of gravitational waves propagating through an inhomogeneous background

European Physical Journal C: Particles and Fields, 2023
We consider the propagation of gravitational waves in the late-time Universe in the presence of matter distribution inhomogeneities, and we also consider the cosmic fluid to be viscous.
Shashank Shekhar Pandey, Arnab Sarkar, Amna Ali, Archan S. Majumdar   +3 more
doaj   +1 more source

High-energy astrophysics with neutrino telescopes [PDF]

The European Physical Journal C, 2010
Neutrino astrophysics offers new perspectives on the Universe investigation: high energy neutrinos, produced by the most energetic phenomena in our Galaxy and in the Universe, carry complementary (if not exclusive) information about the cosmos with respect to photons.
SPURIO, MAURIZIO, CHIARUSI, TOMMASO
openaire   +3 more sources

A Decline in the Nonthermal X-ray Emission from Cassiopeia A [PDF]

, 2011
We present new Chandra ACIS-S3 observations of Cassiopeia A which, when combined with earlier ACIS-S3 observations, show evidence for a steady ~1.5%-2% yr–1 decline in the 4.2-6.0 keV X-ray emission between the years 2000 and 2010. The computed flux from
Astrophysics, Patnaude, D.J., Vink, J., Fesen, R.A., Laming, J.M., Sub High energy Astrophysics begr 1/1/15   +5 more
core   +1 more source

Supergalactic Structure of Multiplets with the Telescope Array Surface Detector [PDF]

EPJ Web of Conferences, 2019
Evidence of supergalactic structure of multiplets has been found for ultra-high energy cosmic rays (UHECR) with energies above 1019 eV using 7 years of data from the Telescope Array (TA) surface detector.
Lundquist Jon Paul, Sokolsky Pierre V.
doaj   +1 more source