Zobrazeno 1 - 10
of 543
pro vyhledávání: '"Heger Alexander"'
Publikováno v:
ApJL, 972, L18 (2024)
Recent neutron star surface observations corroborate a long-standing theory that neutron stars may be accelerated over extended periods after their birth. We analyze how these prolonged rocket-like accelerations, combined with rapid birth kicks, impa
Externí odkaz:
http://arxiv.org/abs/2407.20967
Supernova theory has struggled to explain the lightest known neutron star candidate with an accurate mass determination, the $1.174\mathrm{M}_\odot$ companion in the eccentric compact binary system J0453+1559. To improve the theoretical lower limit f
Externí odkaz:
http://arxiv.org/abs/2407.08407
We compute the $^{63}$Ga(p,$\gamma$)$^{64}$Ge and $^{64}$Ge(p,$\gamma$)$^{65}$As thermonuclear reaction rates using the latest experimental input supplemented with theoretical nuclear spectroscopic information. The experimental input consists of the
Externí odkaz:
http://arxiv.org/abs/2406.14624
We present a detailed analysis of the dynamics of proto-compact star (PCS) convection and the core ${}^2\!g_1$-mode in core-collapse supernovae based on general relativistic 2D and 3D neutrino hydrodynamics simulations. Based on 2D simulations, we de
Externí odkaz:
http://arxiv.org/abs/2405.01449
In our Galactic Center, about 10,000 to 100,000 stars are estimated to have survived tidal disruption events, resulting in partially disrupted remnants. These events occur when a supermassive black hole (SMBH) tidally interacts with a star, but not e
Externí odkaz:
http://arxiv.org/abs/2403.04211
Autor:
Ji, Alexander P., Curtis, Sanjana, Storm, Nicholas, Chandra, Vedant, Schlaufman, Kevin C., Stassun, Keivan G., Heger, Alexander, Pignatari, Marco, Price-Whelan, Adrian M., Bergemann, Maria, Stringfellow, Guy S., Frohlich, Carla, Reggiani, Henrique, Holmbeck, Erika M., Tayar, Jamie, Shah, Shivani P., Griffith, Emily J., Laporte, Chervin F. P., Casey, Andrew R., Hawkins, Keith, Horta, Danny, Cerny, William, Thibodeaux, Pierre, Usman, Sam A., Amarante, Joao A. S., Beaton, Rachael L., Cargile, Phillip A., Chiappini, Cristina, Conroy, Charlie, Johnson, Jennifer A., Kollmeier, Juna A., Li, Haining, Loebman, Sarah, Meynet, Georges, Bizyaev, Dmitry, Brownstein, Joel R., Gupta, Pramod, Morrison, Sean, Pan, Kaike, Ramirez, Solange V., Rix, Hans-Walter, Sanchez-Gallego, Jose
Stars formed with initial mass over 50 Msun are very rare today, but they are thought to be more common in the early universe. The fates of those early, metal-poor, massive stars are highly uncertain. Most are expected to directly collapse to black h
Externí odkaz:
http://arxiv.org/abs/2401.02484
Publikováno v:
EPJ Web of Conferences, Vol 260, p 11028 (2022)
Up to now, more than 62 of the 115 X-ray sources of low-mass-X-ray binaries have been identified as photospheric radius expansion (PRE) bursters [1]. Galloway and collaborators expect more PRE bursters in their near future analysis [2]. Although more
Externí odkaz:
https://doaj.org/article/2ac7ac994776442eb06881477c462079
Autor:
Liu Weiping, Li Zhihong, He Jianjun, Tang Xiaodong, Lian Gang, Su Jun, Shen Yangping, An Zhu, Chao Fuqiang, Chang Jianjun, Chen Lihua, Chen Han, Chen Xiongjun, Chen Yunhua, Chen Zhijun, Cheng Jianping, Cui Baoqun, Fang Xiao, Fu Changbo, Gan Lin, Guo Bing, Han Zhiyu, Guo Xuyuan, He Guozhu, He Jinrong, Heger Alexander, Hou Suqing, Huang Hanxiong, Huang Ning, Jia Baolu, Jiang Liyang, Kubono Shigeru, Li Jianmin, Li Mingchuan, Li Kuoang, Li Ertao, Li Tao, Li Yunju, Lugaro Maria, Luo Xiaobing, Ma Hongyi, Ma Shaobo, Mei Dongming, Nan Wei, Nan Weike, Qi Ningchun, Qian Yongzhong, Qin Jiuchang, Ren Jie, Shang Changsong, Sun Liangting, Sun Wenliang, Tan Wanpeng, Tanihata Isao, Wang Shuo, Wang Peng, Wang Youbao, Wu Qi, Xu Shiwei, Yang Yao, Yu Xiangqing, Yue Qian, Zeng Sheng, Zhang Long, Zhang Hao, Zhang Huanyu, Zhang Liyong, Zhang Ningtao, Zhang Peng, Zhang Qiwei, Zhang Tao, Zhang Xiaopeng, Zhang Xuezhen, Zhao Wei, Zhou Jifang, Zhou Yong
Publikováno v:
EPJ Web of Conferences, Vol 260, p 08001 (2022)
Underground Nuclear Astrophysics Experiment in China (JUNA) has been commissioned by taking the advantage of the ultra-low background in Jinping underground lab. High current mA level 400 KV accelerator with an ECR source and BGO detectors were commi
Externí odkaz:
https://doaj.org/article/cc5957baea144be0bfeeca2c98202ff3
Autor:
Lam Yi Hua, Lu Ning, Heger Alexander, Jacobs Adam Michael, Smirnova Nadezda A., Nieto Teresa Kurtukian, Johnston Zac, Kubono Shigeru
Publikováno v:
EPJ Web of Conferences, Vol 260, p 11023 (2022)
In Type-I X-ray bursts (XRBs), the rapid-proton capture (rp-) process passes through the NiCu and ZnGa cycles before reaching the region above Ge and Se isotopes that hydrogen burning actively powers the XRBs. The sensitivity study performed by Cybur
Externí odkaz:
https://doaj.org/article/fa43d427d9fb46e4944ddb2347cf9c20
Low-metallicity very massive stars with an initial mass of $\sim 140$--$260\, {\rm M_\odot}$ are expected to end their lives as pair-instability supernovae (PISNe). The abundance pattern resulting from a PISN differs drastically from regular core-col
Externí odkaz:
http://arxiv.org/abs/2310.00591