Results 1 to 10 of about 609 (248)
Intensity and Polarization of Radiation Emerging from Rotating Accretion Disc with Increasing Height
Universe, 2020 We consider the radiation emission in continuum and spectral lines from rotating accretion disc with the progressive increasing height. It is known that for the plane accretion disc with homogeneous atmosphere the wave electric field E is perpendicular ...
Nikolai Silant’ev +3 more
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The 35-Day Cycle of Hercules X-1 in Multiple Energy Bands from MAXI and Swift/BAT Monitoring
Universe, 2021 Hercules X-1 (Her X-1) has been monitored by MAXI and by Swift/BAT for over a decade. Those observations are analyzed to measure the shape and energy dependence of the long-term average of the 35-day cycle of Her X-1. The cross-correlation (CC) method is
Denis Leahy, Yuyang Wang
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Gökada Merkezlerindeki Maser Disklerin Denge Eğrilik Profillerinin Belirlenmesi
Süleyman Demirel Üniversitesi Fen-Edebiyat Fakültesi Fen Dergisi, 2022 Gökada merkezlerindeki süper kütleli kara delikleri çevreleyen maser diskler, merkezlerindeki kara deliğin kütlesinin belirlenmesi ve kütle aktarım süreçlerinin incelenmesi gibi güncel astrofizik problemleri hakkında faydalı bilgiler sunar. Gözlemler, bu
Ayşe Ulubay
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ACCRETION DISCS AROUND BLACK HOLES: DEVELOPEMENT OF THEORY
Odessa Astronomical Publications, 2017 Standard accretion disk theory is formulated which is based on the local heat balance. The energy produced by a turbulent viscous heating is supposed to be emitted to the sides of the disc.
G. S. Bisnovatyi-Kogan
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Dead discs, unstable discs and the stars they surround
EPJ Web of Conferences, 2014 Strong stellar magnetic fields significantly alter the behaviour of surrounding accretion discs. Recent work has demonstrated that at low accretion rates a large amount of mass can remain confined in the disc, contrary to the standard assumption that the
D’Angelo Caroline
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Dynamics of magnetic flux tubes in accretion disks of Herbig Ae/Be stars
Open Astronomy, 2022 The dynamics of magnetic flux tubes (MFTs) in the accretion disk of typical Herbig Ae/Be star (HAeBeS) with fossil large-scale magnetic field is modeled taking into account the buoyant and drag forces, radiative heat exchange with the surrounding gas ...
Khaibrakhmanov Sergey A. +1 more
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Frontiers in Astronomy and Space Sciences, 2021 One normal outburst and three mini-outbursts have been detected by Rossi X-ray Timing Explorer satellite after 2000 in the well-known black hole X-ray binary XTE J1550-564.
Ai-Jun Dong +10 more
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Accretion disc particle accretion in major merger simulations [PDF]
Monthly Notices of the Royal Astronomical Society, 2013 A recent approach to simulating localized feedback from active galactic nuclei by Power et al. (2011) uses an accretion disc particle to represent both the black hole and its accretion disc. We have extrapolated and adapted this approach to simulations of Milky Way-sized galaxy mergers containing black holes and explored the impact of the various ...
Wurster, James Howard +1 more
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Promise of Persistent Multi-Messenger Astronomy with the Blazar OJ 287
Galaxies, 2021 Successful observations of the seven predicted bremsstrahlung flares from the unique bright blazar OJ 287 firmly point to the presence of a nanohertz gravitational wave (GW) emitting supermassive black hole (SMBH) binary central engine.
Mauri J. Valtonen +9 more
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Power spectra from spotted accretion discs [PDF]
Proceedings of the International Astronomical Union, 2006 AbstractSome aspects of power-spectral densities (PSD) of active galactic nuclei are similar to those of galactic black hole X-ray binary systems (McHardy et al. 2005). The signal originates near a black hole and its modulation by general-relativistic effects should be taken into account (Życki & Nedźwiecki 2005).
Pecháček, T., Dovčiak, M., Karas, V.
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