Microlensing Influence on the Line Shapes Generated by a Relativistic Accretion Disc

2006 ◽  
pp. 304-305
Author(s):  
L. Č. Popović ◽  
E. G. Mediavilla ◽  
J. A. Muñoz
Keyword(s):  
Accretion Disc ◽  
Line Shapes

scholarly journals The influence of microlensing on spectral line shapes generated by a relativistic accretion disc

2001 ◽  
Vol 378 (1) ◽  
pp. 295-301 ◽  
Author(s):  
L. Č. Popović ◽  
E. G. Mediavilla ◽  
J. A. Muñoz
Keyword(s):  
Spectral Line ◽  
Accretion Disc ◽  
Line Shapes

scholarly journals The gravitational microlens influence on X-ray spectral line generated by an AGN accretion disc

2001 ◽  
pp. 53-56 ◽  
Author(s):  
L.C. Popovic ◽  
E.G. Mediavilla ◽  
J.A. Munoz ◽  
M.S. Dimitrijevic ◽  
P. Jovanovic
Keyword(s):  
Spectral Line ◽  
Accretion Disc ◽  
Compact Objects ◽  
Host Galaxy ◽  
Line Profiles ◽  
Solar Mass ◽  
X Ray ◽  
Line Shapes ◽  
Ring Radius ◽  
Disc Model

The influence of gravitational microlensing on the X-ray spectral line profiles originated from a relativistic accretion disc has been studied. Using a disc model, we show that microlensing can induce noticeable changes in the line shapes when the Einstein ring radius associated with the microlens is of a size comparable to that of the accretion disc. Taking into account the relatively small size of the X-ray accretion disc, we found that compact objects (of about a Solar mass) which belong to the bulge of the host galaxy can produce significant changes in the X-ray line profile of AGN.

H NMR Evidence for a Change in The Local Hydrogen Environment of Sites Associated with the Staebler-Wronski Effect in a-Si:H

2002 ◽  
Vol 715 ◽  
Author(s):  
T. Su ◽  
Robin Plachy ◽  
P. C. Taylor ◽  
S. Stone ◽  
G. Ganguly ◽  
...  
Keyword(s):  
Line Shape ◽  
Defect Density ◽  
Hydrogen Atoms ◽  
Hydrogen Environment ◽  
H Nmr ◽  
Line Shapes ◽  
Different Temperatures ◽  
Staebler Wronski Effect

AbstractWe study the H NMR line shapes of a sample of a-Si:H under several conditions: 1) as grown, 2) light-soaked for 600 hours, and 3) light-soaked followed by annealing at different temperatures. At T = 7 K, the NMR line shape of the sample after light soaking exhibits an additional doublet compared to that of the sample as-grown. This doublet is an indication of a closely separated hydrogen pair. The distance between the two hydrogen atoms is estimated to be about (2.3 ± 0.2) Å. The concentration of these hydrogen sites is estimated to be between 1017 and 1018 cm-3 consistent with ESR measurements of the defect density after light soaking. This doublet disappears after the sample is annealed at 200°C for 4 hours.

Testing the Planet Hypothesis: A Search for Variability in the Spectral‐Line Shapes of 51 Pegasi

1997 ◽  
Vol 478 (1) ◽  
pp. 374-380 ◽  
Author(s):  
Artie P. Hatzes ◽  
William D. Cochran ◽  
Christopher M. Johns‐Krull
Keyword(s):  
Spectral Line ◽  
Line Shapes

scholarly journals High-Resolution Photoabsorption Spectrum of Cs+ (5p61So + 5p5ns, nd) Between 504A and 600A using a Laser Ionized Cs Vapor Column

1984 ◽  
Vol 86 ◽  
pp. 124-124
Author(s):  
T.J. McIlrath ◽  
V. Kaufman ◽  
J. Sugar ◽  
W.T. Hill ◽  
D. Cooper
Keyword(s):  
High Resolution ◽  
Laser Pulse ◽  
High Voltage ◽  
Power Output ◽  
Random Phase ◽  
Grazing Incidence ◽  
Fano Resonances ◽  
Line Shapes ◽  
Phase Calculation ◽  
Photoabsorption Spectrum

Rapid ionization of Cs vapor in a heat pipe at 0.05 torr was achieved by pumping the 6s 2S½ – 7p 2P½ transition (f=0.007)1 with a flash-pumped dye laser at 4593.2A and I MW power output. Photoabsorptian initiated at the end of the laser pulse(≃ 0.5/s) showed the 5p5ns and nd series below and above the 5p52P3/2 threshold at 535.4A. Broad Beutler - Fano resonances appeared in the d series above threshold. The spectrum was recorded photographically on a 10.7m grazing incidence spectrograph using a continuum background generated by a BRV high-voltage spark source with a uranium anode. We will compare the line-shapes and the quantum defect (Lu-Fano2) plot with the predictions of a relativistic random phase calculation.

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