Results 121 to 130 of about 5,289 (173)

Energy Flow and Radiation Efficiency in Radiative GRMHD Simulations of Neutron Star Ultraluminous X-Ray Sources

The Astrophysical Journal
We investigate numerically the energy flow and radiation efficiency of accreting neutron stars as potential ultraluminous X-ray sources (ULXs). We perform 10 simulations in radiative general relativistic magnetohydrodynamics, exploring six different ...
Fatemeh Kayanikhoo, Włodek Kluźniak, David Abarca, Miljenko Čemeljić   +3 more
doaj   +1 more source

Multiwavelength Observations of the Apparently Nonrepeating FRB 20250316A

The Astrophysical Journal
The physical origin of fast radio bursts (FRBs) remains uncertain. Although multiwavelength observations have been widely conducted, only Galactic FRB 20200428D is associated with an X-ray burst from the magnetar SGR J1935+2154.
Ye Li, Hui Sun, Lei Qian, Dong-Yue Li, Yan-Long Hua, Li-Ping Xin, Cheng-Kui Li, Yi-Han Wang, Jia-Rui Niu, Tian-Rui Sun, Zhu-Heng Yao, Jin-Jun Geng, Chi-Chuan Jin, Nanda Rea, Yuan Liu, Zhi-Chen Pan, Tao An, Vadim Burwitz, Zhi-Ming Cai, Jin-Huang Cao, Yong Chen, Hua-Qing Cheng, Wei-Wei Cui, Hua Feng, Peter Friedrich, Da-Wei Han, Jing-Wei Hu, Lei Hu, Yu-Xiang Huang, Shu-Mei Jia, Ji-An Jiang, Bin Li, Feng Li, Ming Liang, Yi-Fang Liang, Hao Liu, He-Yang Liu, Hua-Qiu Liu, Norbert Meidinger, Hai-Wu Pan, Arne Rau, Xin-Wen Shu, Chun Sun, Lian Tao, Jin-Long Tang, Zhen Wan, Hai-Ren Wang, Jian Wang, Jing Wang, Yun-Fei Xu, Yongquan Xue, Xuan Yang, Da-Zhi Yao, Yuhan Yao, Wen Zhao, Xiao-Fan Zhao, Hong-Fei Zhang, Jia-Heng Zhang, Juan Zhang, Mo Zhang, Song-Bo Zhang, Wen-Da Zhang, Xiao-Ling Zhang, Yong-He Zhang, Yong-Kun Zhang, Xian-Zhong Zheng, Yu-Hao Zhu, Ying-Xi Zuo, Sheng-Li Sun, Jian-Yan Wei, Wei-Wei Zhu, Peng Jiang, Weimin Yuan, Xue-Feng Wu, Bing Zhang   +74 more
doaj   +1 more source

Spectral Calculations of 3D Radiation Magnetohydrodynamic Simulations of Super-Eddington Accretion onto a Stellar-mass Black Hole

The Astrophysical Journal
We use the Athena++ Monte Carlo (MC) radiation transfer module to postprocess simulation snapshots from nonrelativistic Athena++ radiation magnetohydrodynamic (RMHD) simulations. These simulations were run using a gray (frequency-integrated) approach but
Brianna S. Mills, Shane W. Davis, Yan-Fei Jiang, Matthew J. Middleton   +3 more
doaj   +1 more source

From Feast to Famine: A Systematic Study of Accretion onto Oblique Pulsars with 3D GRMHD Simulations

The Astrophysical Journal Letters
Disk-fed accretion onto neutron stars can power a wide range of astrophysical sources ranging from X-ray binaries, to accretion-powered millisecond pulsars, ultraluminous X-ray sources, and gamma-ray bursts.
Ariadna Murguia-Berthier, Kyle Parfrey, Alexander Tchekhovskoy, Jonatan Jacquemin-Ide   +3 more
doaj   +1 more source

Theoretical Analysis of the RX J0209.6−7427 X-Ray Spectrum during a Giant Outburst

The Astrophysical Journal Letters
We model the spectral formation occurring in the binary X-ray pulsar (XRP) RX J0209.6−7427 during the 2019 super-Eddington outburst. Using a theoretical model previously developed by the authors, we are able to produce spectra that closely resemble the ...
Brent F. West, Peter A. Becker, Georgios Vasilopoulos   +2 more
doaj   +1 more source

Colliding winds in ultraluminous X-ray sources

, 2022
Fil: Abaroa, Leandro. Universidad Nacional de La Plata. Facultad de Ciencias Astronómicas y Geofísicas; Argentina. Provincia de Buenos Aires. Gobernación. Comisión de Investigaciones Científicas. Instituto Argentino de Radioastronomía. Consejo Nacional de Investigaciones Científicas y Técnicas.
Abaroa, Leandro, Romero, Gustavo Esteban, Sotomayor Checa, Pablo Omar   +2 more
openaire   +3 more sources

A Striking Confluence Between Theory and Observations of High-Mass X-ray Binary Pulsars. [PDF]

Res Astron Astrophys, 2018
Christodoulou DM, Laycock SGT, Kazanas D.   +2 more
europepmc   +1 more source

The Great Pretenders Among the ULX Class. [PDF]

Res Astron Astrophys, 2017
Christodoulou DM, Laycock SGT, Kazanas D, Cappallo R, Contopoulos I.   +4 more
europepmc   +1 more source

Detection of the Optical Counterpart of the Transient ULX NGC 300 ULX-1: A Nascent Black Hole-neutron Star Binary?

The Astrophysical Journal
The endpoints of massive star evolution are poorly known, especially those in interacting binary systems containing compact objects, such as neutron stars or black holes (BHs).
André-Nicolas Chené, Georgios Vasilopoulos, Lidia M. Oskinova, Clara Martínez-Vázquez   +3 more
doaj   +1 more source

<i>NICER</i> and <i>Fermi</i> GBM Observations of the First Galactic Ultraluminous X-ray Pulsar Swift J0243.6+6124. [PDF]

Astrophys J, 2018
Wilson-Hodge CA, Malacaria C, Jenke PA, Jaisawal GK, Kerr M, Wolff MT, Arzoumanian Z, Chakrabarty D, Doty JP, Gendreau KC, Guillot S, Ho WCG, LaMarr B, Markwardt CB, Özel F, Prigozhin GY, Ray PS, Ramos-Lerate M, Remillard RA, Strohmayer TE, Vezie ML, Wood KS.   +21 more
europepmc   +1 more source