Results 1 to 10 of about 1,814 (268)
Stellar Evolution with Radiative Feedback in AGN Disks
The Astrophysical JournalStars embedded in the inner parsec region of an active galactic nucleus (AGN) experience extreme accretion conditions that significantly alter their evolution.
Zheng-Hao Xu +2 more
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Super-Eddington Magnetized Neutron Star Accretion Flows: A Self-similar Analysis
The Astrophysical JournalThe properties of super-Eddington accretion disks exhibit substantial distinctions from the sub-Eddington ones. In this paper, we investigate the accretion process of a magnetized neutron star (NS) surrounded by a super-Eddington disk.
Ken Chen, Zi-Gao Dai
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The Astrophysical Journal, 1999 Recent observations reveal a similar frequency dependence f-b in the X-rays from stellar black hole candidates and active galactic nuclei (AGNs). Several X-ray sources have a steeper decline of the power spectrum, b=1.5-1.7 at f>1.0 Hz. Data from EXOSAT have shown that AGNs have a universal slope of b~1.55.
openaire +1 more source
Circumstellar Disk Accretion Across the Lagoon Nebula: The Influence of Environment and Stellar Mass
The Astronomical JournalPre-main-sequence disk accretion is pivotal for determining the final stellar properties and the early conditions for close-in planets. We aim to establish the impact of internal (stellar mass) and external (radiation field) parameters on the disk ...
Laura Venuti +11 more
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The Astrophysical JournalThe accretion disks that power active galactic nuclei (AGN) are thought to house populations of stars and compact objects; after forming binaries these compact objects may merge, begetting gravitational waves (GWs) such as those detected by LIGO and ...
Alexander J. Dittmann +2 more
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Accretion Regimes of Neutrino-cooled Flows onto Black Holes
The Astrophysical JournalNeutrino-cooled accretion disks can form in the aftermath of neutron-star mergers as well as during the collapse of rapidly rotating massive stars and the accretion-induced collapse of rapidly rotating white dwarfs.
Javiera Hernández-Morales +1 more
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A short-timescale negative optical continuum lag in SDSS J083717.88+191647
Astronomy & AstrophysicsContinuum reverberation mapping (RM) is a powerful technique for constraining the accretion disk structure in active galactic nuclei (AGNs). In typical cases, the shorter-wavelength emission is used as the reference, and a positive time lag is observed ...
Chen Mu-Lin +6 more
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Retrograde Accretion Disks in High-Mass Be/X-ray Binaries. [PDF]
Mon Not R Astron Soc Lett, 2017 Christodoulou DM +2 more
europepmc +1 more source
Astronomy & AstrophysicsWe investigated the long-term evolution of the cyclotron line energy, as well as the relationship between cyclotron line energy and luminosity in the high-mass X-ray binary Vela X-1, based on archival Swift/BAT monitoring from 2005 to 2024 and pulse-to ...
Du Yu-Jia +7 more
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Temporal evolution of the circumstellar disc orientation in the transient X-ray pulsar GRO J1008−57
Astronomy & AstrophysicsThe transient X-ray pulsar GRO J1008−57 was previously found to exhibit Type I outbursts occurring at stable orbital phases before its first observed Type II outburst in 2012.
Hu Yongfeng +5 more
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