Results 11 to 20 of about 151,210 (305)
“Dark Matter” in Accretion Disks [PDF]
The Astrophysical Journal, 2008 Using Spitzer Space Telescope photometric observations of the eclipsing, interacting binary WZ Sge, we have discovered that the accretion disk is far more complex than previously believed. Our 4.5 and 8 micron time series observations reveal that the well known gaseous accretion disk is surrounded by an asymmetric disk of dusty material with a radius ...
Howell, Steve B. +6 more
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Continuum Reverberation Mapping of AGN Accretion Disks
Frontiers in Astronomy and Space Sciences, 2017 We show recent detections of inter-band continuum lags in three AGN (NGC 5548, NGC 2617, and MCG+08-11-011), which provide new constraints on the temperature profiles and absolute sizes of the accretion disks.
Michael M. Fausnaugh +8 more
doaj +2 more sources
Modelling and observations of molecules in discs around young stars [PDF]
, 2013 This thesis contains a study of molecules within circumstellar discs around young stars. Firstly, the chemistry of a disc around a young, Class 0 protostar is modelled.
Ilee, John David
core +5 more sources
Symposium - International Astronomical Union, 1986 Flare activity on the sun may be attributed to the distortion of coronal magnetic field caused primarily by vortical (Shearing) photospheric motion. If an accretion disk is permeated by a magnetic field, the strong differential rotation of the disk will lead to similar stressing of the magnetosphere, and one may expect similar flare activity to occur ...
P. A. Sturrock, W. Yang
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In this chapter, we review some of the interesting consequences that tilt between the spin axis of the black hole and angular momentum axis of the accretion disk can have on the dynamics, thermodynamics, and observational appearance of accreting systems, from precessing coronae and jets to standing nozzle shocks and quasi-periodic oscillations.
Fragile, P. Chris, Liska, Matthew
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Dissipationless disk accretion [PDF]
Astronomy Reports, 2005 17 pages, 6 figures, published in Astronomy Reports, Vol.49, No.1, 2005, p.57 (submitted September 13, 2003). Unfortunately, we did not upload the paper to astro-ph before, but since the topic is now of interest we feel that the paper would benefit the ...
Bogovalov, Sergey V. +1 more
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Counterrotating Accretion Disks [PDF]
The Astrophysical Journal, 1996 7 pages, 3 figures, aas2pp4.sty, submitted to ...
Lovelace, R. V. E., Chou, Tom
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Accretion Disks in Algols [PDF]
International Astronomical Union Colloquium, 1989 AbstractBasic theoretical concepts concerning formation and properties of disKs in close binary systems are reviewed and compared with observations of Algols.
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Accretion disk instabilities [PDF]
International Astronomical Union Colloquium, 1986 In this article we discuss two instabilities of stationary accretion disks which lead to an understanding of observed light variations in accretion disk systems, the dwarf novae and the rapid burster MXB 17030-335. The accretion disks in these systems avoid instability at the cost of stationarity and perform stable cycles in which sudden changes of the
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Modelling accretion in transitional disks [PDF]
Astronomy & Astrophysics, 2013 Transitional disks are protoplanetary disk around young stars that display inner holes in the dust distribution within a few AU, which is accompanied nevertheless by some gas accretion onto the central star. These cavities could possibly be created by the presence of one or more massive planets. If the gap is created by planets and gas is still present
Kley, Wilhelm +1 more
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