Thermal and Recombination Emission of NO2

1970 ◽  
Vol 53 (2) ◽  
pp. 647-658 ◽  
Author(s):  
D. E. Paulsen ◽  
W. F. Sheridan ◽  
R. E. Huffman
Keyword(s):  
Recombination Emission

scholarly journals Imaging and spectroscopy of the LMC He II nebula N 44C and its ionizing star

1999 ◽  
Vol 193 ◽  
pp. 480-481
Author(s):  
Vanessa C. Galarza ◽  
Donald R. Garnett ◽  
You-Hua Chu
Keyword(s):  
Large Magellanic Cloud ◽  
Convincing Evidence ◽  
H Ii Regions ◽  
Uv Spectrum ◽  
Ionized Gas ◽  
X Ray ◽  
H Ii Region ◽  
Recombination Emission ◽  
Imaging And Spectroscopy ◽  
Echelle Spectroscopy

We present results from new HST imaging and spectroscopy of the peculiar Large Magellanic Cloud H II region N 44C and its ionizing star. While this nebula exhibits strong He II recombination emission, the source of the He+ ionizing photons has not been found. The UV spectrum of the ionizing star suggests an approximate spectral class of 07–08; the UV Si IV, He II, and N IV features do not show P-Cygni profiles, indicating that the ionizing star is not a supergiant. No companion star has yet been detected. Ground-based and HST optical spectroscopy of the ionized gas shows that the nebular abundances of C, N, O and He are not anomalous relative to other LMC H II regions, suggesting that no previous WR/SN companion has disappeared. Echelle spectroscopy has also ruled out the presence of high velocity shocked gas. Deep ROSAT imaging shows no X-ray point source in this location. The “fossil X-ray binary” hypothesis of Pakull & Motch (1989) remains the best explanation for the ionization of this nebula; however, convincing evidence for this hypothesis remains elusive.

Far-Infrared Recombination Emission inn-Ge andp-InSb

1970 ◽  
Vol 1 (2) ◽  
pp. 662-671 ◽  
Author(s):  
S. N. Salomon ◽  
H. Y. Fan
Keyword(s):  
Far Infrared ◽  
Recombination Emission

The Structure and X‐Ray Recombination Emission of a Centrally Illuminated Accretion Disk Atmosphere and Corona

2002 ◽  
Vol 581 (2) ◽  
pp. 1297-1327 ◽  
Author(s):  
M. A. Jimenez‐Garate ◽  
J. C. Raymond ◽  
D. A. Liedahl
Keyword(s):  
Accretion Disk ◽  
X Ray ◽  
Recombination Emission

scholarly journals Mechanisms for the creation of intrinsic electron-hole trapping centers in a CaSO4 crystall

2021 ◽  
Vol 5 (3) ◽  
pp. 235-241
Author(s):  
T.N. Nurakhmetov ◽  
K.B. Zhangylyssov ◽  
A.M. Zhunusbekov ◽  
D.H. Daurenbekov ◽  
T.T. Alibay ◽  
...  
Keyword(s):  
Vacuum Ultraviolet ◽  
Electron Hole ◽  
Long Wavelength ◽  
Hole Trapping ◽  
Energy Distance ◽  
Anionic Complexes ◽  
Recombination Emission ◽  
Trapping Centers ◽  
The Creation

The mechanism of creation of electron-hole trapping centers in CaSO4 at 15-300 K was investigated by the methods of vacuum-ultraviolet and thermoactivation spectroscopy. It is shown that electron-hole trapping centers are formed upon trap of electrons in the anionic complexes SO4− and localization of holes in the form of SO4− radical. Based on the measurement of the spectrum of excitation of long-wavelength recombination emission at 3.0-3.1 eV and 2.7 eV, the energy distance of the formed electron-hole trapping centers was estimated (4.43 eV and 3.87 eV).

Sign in / Sign up

Export Citation Format

Share Document