Narrow radio recombination lines from ionization fronts

1977 ◽  
Vol 212 ◽  
pp. 692 ◽  
Author(s):  
J. K. Hill
Keyword(s):  
Radio Recombination Lines ◽  
Ionization Fronts

Low-frequency radio recombination lines: observations and data processing

2017 ◽  
Vol 23 (1) ◽  
pp. 50-53
Author(s):  
A.A. Konovalenko ◽  
◽  
S.V. Stepkin ◽  
E.V. Vasilkovskiy ◽  
◽  
...  
Keyword(s):  
Data Processing ◽  
Low Frequency ◽  
Radio Recombination Lines

scholarly journals FREE-FREE EMISSION AND RADIO RECOMBINATION LINES FROM PHOTOEVAPORATING DISKS

2012 ◽  
Vol 751 (2) ◽  
pp. L42 ◽  
Author(s):  
I. Pascucci ◽  
U. Gorti ◽  
D. Hollenbach
Keyword(s):  
Radio Recombination Lines

Observation of Transonic Ionization Fronts in Low-Density Foam Targets

1999 ◽  
Vol 82 (15) ◽  
pp. 3070-3073 ◽  
Author(s):  
D. Hoarty ◽  
L. Barringer ◽  
C. Vickers ◽  
O. Willi ◽  
W. Nazarov
Keyword(s):  
Low Density ◽  
Ionization Fronts

scholarly journals 3.29. Radio recombination lines from starburst galaxies

1998 ◽  
Vol 184 ◽  
pp. 147-148
Author(s):  
K.R. Anantharamaiah
Keyword(s):  
Millimeter Wave ◽  
Dynamic Range ◽  
Starburst Galaxies ◽  
Aperture Synthesis ◽  
Emission Region ◽  
Full Extent ◽  
Radio Recombination Lines

Starburst activity is often heavily obscured by dust. To see through the dust and measure the full extent, power and dynamics of the starburst, we are surveying hydrogen radio recombination lines (RRLs) from famous nearby starburst galaxies. Exploiting the improved sensitivity and dynamic range of aperture synthesis arrays such as the VLA and the AT and millimeter-wave telescopes such as SEST and the IRAM-30m telescope, we have searched for RRLs in about 25 starburst galaxies. RRLs have been detected in 14 galaxies. The observations were made variously at 1.4, 4.9, 8.4, 86, 135 and 232 GHz (Anantharamaiah et al 1993, Zhao et al 1996, 1997, Phookun et al 1997). Table 1 summarizes the observations. In all the cases the detected line originates in the nuclear starburst region and the emission region is resolved with a beam of 1–3″.

scholarly journals Ionization fronts in coupled MHD-gas simulations

2017 ◽  
Vol 24 (9) ◽  
pp. 092112 ◽  
Author(s):  
A. D. Wilson ◽  
D. A. Diver
Keyword(s):  
Ionization Fronts

scholarly journals Populations of Hydrogen-like Atoms or Ions and Radio Recombination Lines (RRL's) Interpretation

2002 ◽  
Vol 199 ◽  
pp. 351-352
Author(s):  
N.I. Rovenskaya
Keyword(s):  
Thermal Radiation ◽  
Electron Density ◽  
Hii Regions ◽  
Kinetic Temperature ◽  
Line Radiation ◽  
Continuum Radiation ◽  
Radio Recombination Lines ◽  
The Continuum

The problem of non-LTE populations has been considered in terms of the departure coefficients ∂bn/∂n as functions of the kinetic temperature Te, the electron density Ne, the continuum radiation flow Ic and the ratios of IHnα, IHnβ, IHnδ and IHnε (the line radiation flows). The ratio of IHnα/IHnβ are sensitive to the thermal radiation from HII regions. Characterized by the relation of ∂2bn/∂n2 > 0, the populations are shown to be inhabited radiatively.

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