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相关论文: The influence of winds on the time-dependent behav…

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Self-similar and semi-analytical solutions are found for the height-averaged equations govern the dynamical behavior of a polytropic, self-gravitating disk under the effects of winds, around the nascent object. In order to describe time…

太阳与恒星天体物理 · 物理学 2015-06-11 Shahram Abbassi , Erfan Nourbakhsh , Mohsen Shadmehri

A disk wind can cause perturbations that propagate throughout the disk via diffusive processes. On reaching the inner disk, these perturbations can change the disk luminosity, which in turn, can change the wind mass loss rate, $\dot{M}_w$.…

高能天体物理现象 · 物理学 2020-02-19 Shalini Ganguly , Daniel Proga

We present Green's function solutions for a geometrically thin, one-dimensional Keplerian accretion disk that includes angular momentum extraction and mass loss due to magnetohydrodynamic (MHD) winds. The disk viscosity is assumed to vary…

高能天体物理现象 · 物理学 2026-01-01 Mageshwaran Tamilan

We examine the effects of a hydrodynamical wind on advection dominated accretion flows with thermal conduction in the presence of a toroidal magnetic field under a self-similar treatment. The disk gas is assumed to be isothermal. For a…

星系天体物理 · 物理学 2010-12-16 S. Abbassi , J. Ghanbari , M. Ghasemnezhad

The effect of a possible hydrodynamical wind on the nature of hot accretion disk solutions is studied. It is found that the advection dominated branch, in the presence of a wind, maintains the self-similar solution for the disk structure…

天体物理学 · 物理学 2009-11-06 Ranjeev Misra , Ronald E. Taam

We study the ejection of winds from thin accretion discs around stellar mass black holes and the time evolution of these winds in presence of radiation field generated by the accretion disc. Winds are produced by radiation, thermal pressure…

高能天体物理现象 · 物理学 2021-01-06 Sananda Raychaudhuri , Mukesh K. Vyas , Indranil Chattopadhyay

The evolution of an accretion disk can be influenced significantly by the deposition of mass and angular momentum by an infalling Bondi-Hoyle wind. Such a mass influx impacts the long-term behavior of the disk by providing additional…

天体物理学 · 物理学 2009-10-28 Heino Falcke , Fulvio Melia

We present new analytical solutions for the evolution of protoplanetary discs (PPDs) where magnetohydrodynamic (MHD) wind-driven processes dominate. Our study uses a 1D model which incorporates equations detailing angular momentum…

星系天体物理 · 物理学 2024-01-19 Mohsen Shadmehri , Fazeleh Khajenabi

We study the evolution of the protoplanetary discs (PPDs) in the presence of magnetically driven winds with the stress relations motivated by the non-ideal MHD disc simulations. Contribution of the magnetic winds in the angular momentum…

星系天体物理 · 物理学 2019-07-31 Mohsen Shadmehri , Sayyedeh Masoumeh Ghoreyshi

According to the standard thin disc theory, it is predicted that the radiation-pressure-dominated inner region of a thin disc is thermally unstable, while observations suggest that it is common for a thin disc of more than 0.01 Eddington…

高能天体物理现象 · 物理学 2023-09-25 Yu Zhao , Xiao-Hong Yang , Li Xue , Shuang-Liang Li

We study the effects of outflow/wind on the gravitational stability of accretion discs around supermassive black holes using a set of analytical steady-state solutions. Mass-loss rate by the outflow from the disc is assumed to be a…

天体物理学 · 物理学 2008-12-18 Fazeleh Khajenabi

The final architecture of planetary systems depends on the extraction of angular momentum and mass-loss processes of the discs in which they form. Theoretical studies proposed that magnetized winds launched from the discs (MHD disc winds)…

We use an analytic framework to calculate the evolution of binary orbits under a physically-motivated model that accounts for angular momentum loss associated with winds from an accretion disk around the compact objected accretor. Our…

高能天体物理现象 · 物理学 2023-08-28 Monica Gallegos-Garcia , Jonatan Jacquemin-Ide , Vicky Kalogera

The evolution of protoplanetary discs and the related process of planet formation is regulated by angular momentum transport and mass-loss processes. Over the past decade, the paradigm of viscosity has been challenged and MHD disc winds…

太阳与恒星天体物理 · 物理学 2021-12-08 Benoît Tabone , Giovanni P. Rosotti , Alexander J. Cridland , Philip J. Armitage , Giuseppe Lodato

What does the temporal evolution of disc winds tell us about accreting systems and the accretion process? Studies of accretion-disc outflows across all mass scales, including accreting white dwarfs, X-ray binaries, and active galactic…

Aims: We investigate the evolution of protoplanetary discs (PPDs hereafter) with magnetically driven disc winds and viscous heating. Methods: We consider an initially massive disc with ~0.1 Msun to track the evolution from the early stage…

地球与行星天体物理 · 物理学 2016-12-07 Takeru K. Suzuki , Masahiro Ogihara , Alessandro Morbidelli , Aurélien Crida , Tristan Guillot

We study the local thermal stability of thin accretion disks. We present a full stability analysis in the presence of a magnetic field and more importantly wind. For wind, we use a general model suitable for adequately describing several…

星系天体物理 · 物理学 2020-01-08 Asiyeh Habibi , Shahram Abbassi

Many close-in multiple-planet systems show a peas-in-a-pod trend, where neighbouring planets have similar sizes, masses, and orbital spacing. Others, including the Solar System, have a more diverse size and mass distribution. Classical…

地球与行星天体物理 · 物理学 2025-01-20 Yunpeng Zhao , Soko Matsumura

The effects of a wind on the emerging spectrum from an inefficiently-radiating accretion flow in a global magnetic field are examined, based on the analytic solution obtained recently by one of the present authors. The results exhibit the…

天体物理学 · 物理学 2009-11-07 Naohiro Yamazaki , Osamu Kaburaki , Motoki Kino

Recent multi-band variability studies have revealed that active galactic nucleus (AGN) accretion disc sizes are generally larger than the predictions of the classical thin disc by a factor of $2\sim 3$. This hints at some missing key…

星系天体物理 · 物理学 2018-10-26 Mouyuan Sun , Yongquan Xue , Jonathan R. Trump , Wei-Min Gu
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