Zobrazeno 1 - 10
of 410
pro vyhledávání: '"Zhang Zhongli"'
Autor:
Zhao, Yuanyuan, Xu, Haiguang, Liu, Ang, Zhang, Xiaoyuan, Ji, Li, Chang, Jiang, Hu, Dan, Werner, Norbert, Zhang, Zhongli, Cui, Wei, Wu, Xiangping
Cosmological simulations indicate that nearly half of the baryons in the nearby Universe are in the warm-hot intergalactic medium (WHIM) phase, with about half of which residing in cosmic filaments. Recent observational studies using stacked survey d
Externí odkaz:
http://arxiv.org/abs/2410.06836
Autor:
Shan, Chenxi, Xu, Haiguang, Zhu, Yongkai, Zhao, Yuanyuan, White, Sarah V., Line, Jack L. B., Zheng, Dongchao, Zhu, Zhenghao, Hu, Dan, Zhang, Zhongli, Wu, Xiangping
Twenty-one-centimetre signals from the Epoch of Reionization (EoR) are expected to be detected in the low-frequency radio window by the next-generation interferometers, particularly the Square Kilometre Array (SKA). However, precision data analysis p
Externí odkaz:
http://arxiv.org/abs/2409.11691
Autor:
Zhou, Dongtao, Zhang, Zhongli, Gupta, Alok C., Kushwaha, Pankaj, Wiita, Paul J., Gu, Minfeng, Xu, Haiguang
Publikováno v:
2024MNRAS.532.3285Z
We present analyses of Suzaku XIS light curves and spectra of the BL Lac object OJ 287 with observations positioned primarily around proposed recurrent optical outbursts. The first two observations were performed in 2007 April 10 - 13 (epoch 1) and 2
Externí odkaz:
http://arxiv.org/abs/2408.02371
Autor:
Valtonen, Mauri J., Zola, Staszek, Gupta, Alok C., Kishore, Shubham, Gopakumar, Achamveedu, Jorstad, Svetlana G., Wiita, Paul J., Gu, Minfeng, Nilsson, Kari, Marscher, Alan P., Zhang, Zhongli, Hudec, Rene, Matsumoto, Katsura, Drozdz, Marek, Ogloza, Waldemar, Berdyugin, Andrei V., Reichart, Daniel E., Mugrauer, Markus, Dey, Lankeswar, Pursimo, Tapio, Lehto, Harry J., Ciprini, Stefano, Nakaoka, T., Uemura, M., Imazawa, Ryo, Zejmo, Michal, Kouprianov, Vladimir V., Davidson, Jr., James W., Sadun, Alberto, Strobl, Jan, Weaver, Z. R., Jelinek, Martin
We report the study of a huge optical intraday flare on November 12, 2021, at 2 am UT, in the blazar OJ287. In the binary black hole model it is associated with an impact of the secondary black hole on the accretion disk of the primary. Our multifreq
Externí odkaz:
http://arxiv.org/abs/2405.08627
Autor:
Tripathi, Tushar, Gupta, Alok C., Takey, Ali, Bachev, Rumen, Vince, Oliver, Strigachev, Anton, Kushwaha, Pankaj, Elhosseiny, E. G., Wiita, Paul J., Damljanovic, G., Dhiman, Vinit, Fouad, A., Gaur, Haritma, Gu, Minfeng, Hamed, G. E., Kishore, Shubham, Kurtenkov, A., Rastogi, Shantanu, Semkov, E., Zead, I., Zhang, Zhongli
We present an extensive recent multi-band optical photometric observations of the blazar S5 0716+714 carried out over 53 nights with two telescopes in India, two in Bulgaria, one in Serbia, and one in Egypt during 2019 November -- 2022 December. We c
Externí odkaz:
http://arxiv.org/abs/2311.10358
Autor:
Gupta, Alok C., Kushwaha, Pankaj, Valtonen, Mauri J., Savchenko, Sergey S., Jorstad, Svetlana G., Imazawa, Ryo, Wiita, Paul J., Gu, Minfeng, Marscher, Alan P., Zhang, Zhongli, Bachev, Rumen, Borman, G. A., Gaur, Haritma, Grishina, T. S., Hagen-Thorn, V. A., Kopatskaya, E. N., Larionov, V. M., Larionova, E. G., Larionova, L. V., Morozova, D. A., Nakaoka, T., Strigachev, A., Troitskaya, Yulia V., Troitsky, I. S., Uemura, M., Vasilyev, A. A., Weaver, Z. R., Zhovtan, A. V.
Publikováno v:
Astrophysical Journal Letters, 957 (2023) L11 (11pp)
We study the optical flux and polarization variability of the binary black hole blazar OJ 287 using quasi-simultaneous observations from 2015 to 2023 carried out using telescopes in the USA, Japan, Russia, Crimea, and Bulgaria. This is one of the mos
Externí odkaz:
http://arxiv.org/abs/2311.02372
Autor:
Bregman, Joel, Cen, Renyue, Chen, Yang, Cui, Wei, Fang, Taotao, Guo, Fulai, Hodges-Kluck, Edmund, Huang, Rui, Ho, Luis C., Ji, Li, Ji, Suoqing, Kang, Xi, Lai, Xiaoyu, Li, Hui, Li, Jiangtao, Li, Miao, Li, Xiangdong, Li, Yuan, Li, Zhaosheng, Liang, Guiyun, Liu, Helei, Liu, Wenhao, Lu, Fangjun, Mao, Junjie, Ponti, Gabriele, Qu, Zhijie, Shan, Chenxi, Shao, Lijing, Shi, Fangzheng, Shu, Xinwen, Sun, Lei, Sun, Mouyuan, Tong, Hao, Wang, Junfeng, Wang, Junxian, Wang, Q. Daniel, Wang, Song, Wang, Tinggui, Wang, Weiyang, Wang, Zhongxiang, Xu, Dandan, Xu, Haiguang, Xu, Heng, Xu, Renxin, Xu, Xiaojie, Xue, Yongquan, Yang, Hang, Yuan, Feng, Zhang, Shuinai, Zhang, Yuning, Zhang, Zhongli, Zhao, Yuanyuan, Zhou, Enping, Zhou, Ping
The Hot Universe Baryon Surveyor (HUBS) is a proposed space-based X-ray telescope for detecting X-ray emissions from the hot gas content in our universe. With its unprecedented spatially-resolved high-resolution spectroscopy and large field of view,
Externí odkaz:
http://arxiv.org/abs/2307.05672
Autor:
Dhiman, Vinit, Gupta, Alok C., Kurtanidze, Sofia O., Eglitis, I., Strigachev, A., Damljanovic, G., Wiita, Paul J., Gu, Minfeng, Gaur, Haritma, Vince, Oliver, Bachev, R., Bisen, D. P., Ibryamov, S., Ivanidze, R. Z., Jovanovic, Miljana D., Kurtanidze, Omar M., Nikolashvili, M. G., Semkov, E., Spassov, B., Stojanovic, M., Villarroel, Beatriz, Xu, Haiguang, Zhang, Zhongli
We report the flux and spectral variability of PG 1553+113 on intra-night (IDV) to short-term timescales using BVRI data collected over 91 nights from 28 February to 8 November 2019 employing ten optical telescopes: three in Bulgaria, two each in Ind
Externí odkaz:
http://arxiv.org/abs/2212.09016
Autor:
Zhou, Yihao, Xu, Haiguang, Zhu, Zhenghao, Zhao, Yuanyuan, Fan, Shida, Shan, Chenxi, Zhu, Yongkai, Hao, Lei, Ji, Li, Zhang, Zhongli, Zheng, Xianzhong
Radio relics are Mpc-sized synchrotron sources located in the peripheral regions of galaxy clusters. Models based on the diffuse shock acceleration (DSA) scenario have been widely accepted to explain the formation of radio relics. However, a critical
Externí odkaz:
http://arxiv.org/abs/2209.09951
Autor:
An, Tao, Wu, Xiaocong, Lao, Baoqiang, Guo, Shaoguang, Xu, Zhijun, Lv, Weijia, Zhang, Yingkang, Zhang, Zhongli
The Square Kilometre Array (SKA) project consists of delivering two largest radio telescope arrays being built by the SKA Observatory (SKAO), which is an intergovernmental organization bringing together nations from around the world with China being
Externí odkaz:
http://arxiv.org/abs/2206.13022