Atomic data estimation for H and C IV transitions in strong gravitation field

Serbian Astronomical Journal ◽

10.2298/saj9959017p ◽

1999 ◽

pp. 17-29

Author(s):

L.C. Popovic

Keyword(s):

Gravitational Field ◽

Active Galactic Nuclei ◽

Field Effect ◽

Principal Quantum Number ◽

Energy Levels ◽

Galactic Nuclei ◽

Atomic Data ◽

Gravitation Field ◽

Strong Gravitation ◽

Data Estimation

The gravitational field effect on atomic data for H and C IV transitions are considered as a perturbation of initial and final energy levels. We found that this perturbation increases with the principal quantum number. Here we give several expressions for estimation of this effect and its influence on atomic data parameters. Also, the calculations of atomic data for 1s ? 2p (Ly?) and 2s ? 3p transitions of hydrogen atom as well as atomic data for 2s2S1/2?2p2P0 1/2,3/2 transitions of C IV (1UV) as a function of deformation of energy levels due to gravitation field and gravitational redshift are given. The gravitational field effect should be estimated and should be taken into account in calculation of atomic data for emitters in Broad Line Regions (BLRs) of Active Galactic Nuclei (AGN).

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General relativistic model for the gravitational field of active galactic nuclei surrounded by a disk

Physical Review D ◽

10.1103/physrevd.71.044009 ◽

2005 ◽

Vol 71 (4) ◽

Cited By ~ 8

Author(s):

D. Vogt ◽

P. S. Letelier

Keyword(s):

Gravitational Field ◽

Active Galactic Nuclei ◽

Galactic Nuclei ◽

Relativistic Model ◽

General Relativistic

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8.12. MHD accretion in a black hole magnetosphere

Symposium - International Astronomical Union ◽

10.1017/s0074180900085259 ◽

1998 ◽

Vol 184 ◽

pp. 367-368

Author(s):

M. Takahashi

Keyword(s):

Black Hole ◽

Active Galactic Nuclei ◽

Thermal Effects ◽

Galactic Nuclei ◽

Plasma Source ◽

Gravitational Energy ◽

Massive Black Hole ◽

Plasma Sources ◽

Strong Gravitation ◽

The Ideal

To explain the activity of active galactic nuclei or compact X-ray sources, I consider a black hole magnetosphere in the center of these objects. The considering black hole magnetosphere is composed of a massive black hole with surrounding fluids and magnetic fields, and rotates rapidly. Because of the strong gravitation and the rapid rotation, both an accretion and a wind/jet would be generated from plasma sources (e.g., an accretion disk and its corona). The outgoing flow carries the angular momentum from the plasma source effectively, and then the accretion would go on stationary, releasing its gravitational energy. I assume that the magnetosphere is stationary and axisymmetric, and that the ideal MHD approximation is available for the streaming fluid. I discuss the thermal effects on MHD flows, and then I argue that the trans-fast MHD accretion solution can be broken by highly thermal effects.

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New Results on X-ray Models and Atomic Data

Highlights of Astronomy ◽

10.1017/s1539299600016737 ◽

2005 ◽

Vol 13 ◽

pp. 648-650 ◽

Cited By ~ 2

Author(s):

Jelle S. Kaastra ◽

Rolf Mewe ◽

Ton Raassen

Keyword(s):

Spectral Analysis ◽

Active Galactic Nuclei ◽

Galactic Nuclei ◽

Atomic Data ◽

X Ray ◽

Spectral Models ◽

Recent Developments ◽

Analysis Package ◽

Diagnostic Power ◽

Made In

AbstractWe discuss the most recent developments of the spectral analysis package SPEX. We report on the progress made in updating the atomic data that are used in the spectroscopic code. We also present a set of spectral models that are used for the analysis of high-resolution X-ray spectra of photo-ionized plasmas such as occur in active galactic nuclei. These models include absorption line spectroscopy of photoionized layers. The importance and diagnostic power of inner-shell transitions is shown. We illustrate our results with several examples of observed spectra obtained with the XMM-Newton and Chandra grating spectrometers.

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