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Astrophysical events that occur in active galactic nucleus (AGN) disks are believed to differ significantly from the ordinary in the interstellar medium. We show that stars located in the outer region of the AGN disk would explode near the…

高能天体物理现象 · 物理学 2023-06-23 Fu-Lin Li , Yu Liu , Xiao Fan , Mao-Kai Hu , Xuan Yang , Jin-Jun Geng , Xue-Feng Wu

The disks of active galactic nuclei (AGNs) have emerged as a rich environment for the evolution of stars and their compact remnants. The very dense medium favors rapid accretion, while torques and migration traps enhance binary formation…

高能天体物理现象 · 物理学 2021-07-07 Rosalba Perna , Hiromichi Tagawa , Zoltan Haiman , Imre Bartos

Fallback in core-collapse supernovae (CCSNe) plays an important role in determining the properties of the central compact remnants, which might produce a black hole (BH) hyperaccretion system in the centre of a massive CCSN. When the…

高能天体物理现象 · 物理学 2021-08-10 Yun-Feng Wei , Tong Liu , Li Xue

Active Galactic Nuclei are powered by geometrically-thin accretion disks surrounding a central supermassive black hole. Here we explore the evolution of stars embedded in these extreme astrophysical environments (AGN stars). Because AGN…

太阳与恒星天体物理 · 物理学 2021-04-07 Matteo Cantiello , Adam S. Jermyn , Douglas N. C. Lin

Disks of gas accreting onto supermassive black holes are thought to power active galactic nuclei (AGN). Stars may form in gravitationally unstable regions of these disks, or may be captured from nuclear star clusters. Because of the dense…

星系天体物理 · 物理学 2021-08-04 Alexander J. Dittmann , Matteo Cantiello , Adam S. Jermyn

Active galactic nuclei (AGN) are prominent environments for stellar capture, growth and formation. These environments may catalyze stellar mergers and explosive transients, such as thermonuclear and core-collapse supernovae (SNe). SN…

高能天体物理现象 · 物理学 2021-07-13 Evgeni Grishin , Alexey Bobrick , Ryosuke Hirai , Ilya Mandel , Hagai B. Perets

Supernova (SN) explosions can potentially affect the structure and evolution of circumnuclear disks in active galactic nuclei (AGN). Some previous studies have suggested that a relatively low rate of SN explosions can provide an effective…

高能天体物理现象 · 物理学 2021-01-13 A. Moranchel-Basurto , F. J. Sánchez-salcedo , Raúl O. Chametla , P. F. Velázquez

Self-gravitating accretion disks collapse to star-forming(SF) regions extending to the inner edge of the dusty torus in active galactic nuclei (AGNs). A full set of equations including feedback of star formation is given to describe the…

宇宙学与河外天体物理 · 物理学 2015-05-19 J. -M. Wang , C. -S. Yan , H. -Q. Gao , C. Hu , Y. -R. Li , S. Zhang

The disks of Active Galactic Nuclei (AGNs) are expected to be populated by numerous stars, either formed in the outer regions of the disk via gravitational instability, or captured from the nearby nuclear star cluster. Regardless of their…

星系天体物理 · 物理学 2025-03-07 Gaia Fabj , Alexander J. Dittmann , Matteo Cantiello , Rosalba Perna , Johan Samsing

Active galactic nuclei (AGN) are powered by the accretion of disks of gas onto supermassive black holes (SMBHs). Stars and stellar remnants orbiting the SMBH in the nuclear star cluster (NSC) will interact with the AGN disk. Orbiters…

星系天体物理 · 物理学 2020-11-02 Gaia Fabj , Syeda S. Nasim , Freddy Caban , K. E. Saavik Ford , Barry McKernan , Jillian M. Bellovary

Some catastrophic stellar explosions, such as supernovae (SNe), compact binary coalescences, and micro-tidal disruption events, are believed to be embedded in the accretion disks of active galactic nuclei (AGN). We show high-energy…

高能天体物理现象 · 物理学 2021-08-23 Jin-Ping Zhu , Kai Wang , Bing Zhang

Core-collapse supernovae (CCSNe) are catastrophic astrophysical phenomena that occur during the last evolutionary stages of massive stars having initial masses of around 8 M$_{\odot}$ or more. These calamitous events play a pivotal role in…

高能天体物理现象 · 物理学 2023-12-29 Amar Aryan

Disks of gas accreting onto supermassive black holes, powering active galactic nuclei (AGN), can capture stars from nuclear star clusters or form stars in situ via gravitational instability. The density and thermal conditions of these disks…

星系天体物理 · 物理学 2023-04-26 Alexander J. Dittmann , Adam S. Jermyn , Matteo Cantiello

Stars can either be formed in or captured by the accretion disks in Active Galactic Nuclei (AGN). These AGN stars are irradiated and subject to extreme levels of accretion, which can turn even low-mass stars into very massive ones ($M > 100…

高能天体物理现象 · 物理学 2021-06-30 Adam S. Jermyn , Alexander J. Dittmann , Matteo Cantiello , Rosalba Perna

White dwarfs (WDs) embedded in gaseous disks of active galactic nucleus (AGNs) can rapidly accrete materials from the disks and grow in mass to reach or even exceed the Chandrasekhar limit. Binary WD (BWD) mergers are also believed to occur…

高能天体物理现象 · 物理学 2021-06-14 Jin-Ping Zhu , Yuan-Pei Yang , Bing Zhang , Liang-Duan Liu , Yun-Wei Yu , He Gao

A supermassive black hole (SMBH) at the core of an active galactic nucleus (AGN) provides room for the elusive ultra-light scalar particles (ULSP) to be produced through a phenomenon called \textit{superradiance}. This phenomenon produces a…

高能天体物理现象 · 物理学 2025-02-26 Priyanka Sarmah , Himanshu Verma , Kingman Cheung , Joseph Silk

Accretion disks around supermassive black holes (SMBHs) in active galactic nuclei contain stars, stellar mass black holes, and other stellar remnants, which perturb the disk gas gravitationally. The resulting density perturbations in turn…

星系天体物理 · 物理学 2016-03-16 Jillian Bellovary , Mordecai-Mark Mac Low , Barry McKernan , K. E. Saavik Ford

The disks of Active Galactic Nuclei (AGNs), traditionally studied as the feeders of the supermassive black holes (SMBHs) at their centers, have recently triggered a lot of interest also as hosts to massive stars and hence their neutron star…

高能天体物理现象 · 物理学 2021-01-27 Rosalba Perna , Davide Lazzati , Matteo Cantiello

The observable characteristics of gamma-ray bursts (GRBs) embedded in the accretion disk of active galactic nuclei (AGNs) are mainly determined by the jet propagation within the disk. In the massive collapsar scenario, we consider that the…

高能天体物理现象 · 物理学 2025-11-20 Yun-Feng Wei , Tong Liu , Bao-Quan Huang

We find that convective regions of collapsing massive stellar cores possess sufficient stochastic angular momentum to form intermittent accretion disks around the newly born neutron star (NS) or black hole (BH), as required by the…

太阳与恒星天体物理 · 物理学 2015-06-18 Avishai Gilkis , Noam Soker
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