Optical Spectrum of a Confined Exciton in a Sphere: A Prototype of Advanced Analyses

2003 ◽  
pp. 135-146
Author(s):  
H. Ajiki ◽  
K. Cho
Keyword(s):  
Optical Spectrum

An Improved Optical Spectrum and New Model Fits of the Likely Brown Dwarf GD 165B

1999 ◽  
Vol 519 (2) ◽  
pp. 834-843 ◽  
Author(s):  
J. Davy Kirkpatrick ◽  
France Allard ◽  
Tom Bida ◽  
Ben Zuckerman ◽  
E. E. Becklin ◽  
...  
Keyword(s):  
Optical Spectrum ◽  
Brown Dwarf ◽  
New Model ◽  
Model Fits

scholarly journals Absorption by Cyclotron Harmonics in the Optical Spectrum of VV Puppis

1979 ◽  
Vol 53 ◽  
pp. 334-340 ◽  
Author(s):  
H.S. Stockman ◽  
James Liebert ◽  
Howard E. Bond
Keyword(s):  
White Dwarf ◽  
Optical Spectrum ◽  
Cyclotron Frequency ◽  
Theoretical Models ◽  
Doppler Broadening ◽  
Cyclotron Emission ◽  
Optical Continuum ◽  
Cyclotron Harmonics ◽  
Accretion Shock ◽  
Depth Effects

Most theoretical models of the AM Her variables (AM Her, AN UMa, W Pup and 2A0311-22) rely on strong cyclotron emission at the fundamental cyclotron frequency and higher harmonics to produce the observed, strongly-polarized optical continuum (e.g. Lamb and Masters 1979). The cyclotron lines, which presumably originate in the hot, isothermal accretion shock at the surface of the white dwarf (kT ≳ 10 keV, h/R* ≲ 0.1), should be blurred into a continuous spectrum by both optical depth effects and electron Doppler broadening. Thus the lack of even weak cyclotron features in the optical spectra of these objects is still compatible with a cyclotron origin.

ELECTRONIC STRUCTURE AND OPTICAL PROPERTIES OF CRYSTALLINE C60

1992 ◽  
Vol 06 (06) ◽  
pp. 309-321 ◽  
Author(s):  
W.Y. CHING ◽  
MING-ZHU HUANG ◽  
YONG-NIAN XU ◽  
FANQI GAN
Keyword(s):  
Optical Properties ◽  
Electronic Structure ◽  
First Principles ◽  
Optical Spectrum ◽  
Local Density ◽  
Low Dielectric Constant ◽  
Experimental Measurements ◽  
Absorption Bands ◽  
Low Dielectric ◽  
Good Agreement

The electronic structure and optical properties of crystalline C 60 and their pressure dependence have been studied by first-principles local density calculations. It is shown that fcc C 60 has a low dielectric constant and an optical spectrum rich in structures. The spectrum shows five disconnected absorption bands in the 1.4 to 7.0 eV region with sharp structures in each band that can be attributed to critical point transitions. This is a manifestation of the localized molecular structure coupled with long range crystalline order unique to the C 60 crystal. At a sufficient high pressure, the structures in the optical spectrum start to merge due to the merging of the bands. These results are in good agreement with some recent experimental measurements.

scholarly journals TiO and VO broad band absorption features in the optical spectrum of the atmosphere of the hot-Jupiter HD 209458b

2008 ◽  
Vol 492 (2) ◽  
pp. 585-592 ◽  
Author(s):  
J.-M. Désert ◽  
A. Vidal-Madjar ◽  
A. Lecavelier des Etangs ◽  
D. Sing ◽  
D. Ehrenreich ◽  
...  
Keyword(s):  
Optical Spectrum ◽  
Broad Band ◽  
Band Absorption ◽  
Absorption Features ◽  
Hot Jupiter

Investigation of Rayleigh-Assisted Coherent Optical Spectrum Analyzer

2021 ◽  
Author(s):  
Hong Dang ◽  
Linqi Chen ◽  
Huanhuan Liu ◽  
Jinna Chen ◽  
Luoyuan Liao ◽  
...  
Keyword(s):  
Optical Spectrum ◽  
Spectrum Analyzer ◽  
Optical Spectrum Analyzer
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