446 citations · 2.2k across the 38 of their papers we have counts for
16 papers · 1 filter
Orion's Bar: Physical Conditions across the Definitive H+ / H0 / H2 Interface
E. W. Pellegrini, J. A. Baldwin, G. J. Ferland +2
Previous work has shown the Orion Bar to be an interface between ionized and molecular gas, viewed roughly edge on, which is excited by the light from the Trapezium cluster. Much o…
Sensitivity of PDR Calculations to Microphysical Details
N. P. Abel, P. A. M. van Hoof, G. Shaw +2
Our understanding of physical processes in Photodissociation regions or Photon Dominated Regions (PDRs) largely depends on the ability of spectral synthesis codes to reproduce the…
Ultraviolet Survey of CO and H_2 in Diffuse Molecular Clouds: The Reflection of Two Photochemistry Regimes in Abundance Relationships
Y. Sheffer, M. Rogers, S. R. Federman +4
(Abridged) We carried out a comprehensive far-ultraviolet (UV) survey of ^12CO and H_2 column densities along diffuse molecular Galactic sight lines in order to explore in detail t…
Rotational quenching rate coefficients for H_2 in collisions with H_2 from 2 to 10,000 K
T. -G. Lee, N. Balakrishnan, R. C. Forrey +4
Rate coefficients for rotational transitions in H_2 induced by H_2 impact are presented. Extensive quantum mechanical coupled-channel calculations based on a recently published (H_…
Merged ionization/dissociation fronts in planetary nebulae
William J. Henney, R. J. R. Williams, Gary J. Ferland +2
The hydrogen ionization and dissociation front around an ultraviolet radiation source should merge when the ratio of ionizing photon flux to gas density is sufficiently low and the…
On the enhanced cosmic-ray ionization rate in the diffuse cloud towards Zeta Persei
Gargi Shaw, G. J. Ferland, R. Srianand +3
The spatial distribution of the cosmic-ray flux is important in understanding the Interstellar Medium (ISM) of the Galaxy. This distribution can be analyzed by studying different m…