446 citations · 3.6k across the 50 of their papers we have counts for
8 papers · 2 filters
The three dimensional dynamic structure of the inner Orion Nebula
C. R. O'Dell, W. J. Henney, N. P. Abel +2
The three dimensional structure of the brightest part of the Orion Nebula is assessed in the light of published and new data. We find that the widely accepted model of a concave bl…
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…
Tracing the [FeII]/[NeII] ratio within star forming dwarf galaxies: a Spitzer IRS archival study
B. O'Halloran, S. C. Madden, N. P. Abel
Archival Spitzer observations of 41 starburst galaxies that span a wide range in metallicity reveal for the first time a correlation between the [FeII]/[NeII] 26.0/12.8 micron rati…
Tracing the [FeII]/[NeII] ratio and its relationship with other ISM indicators within star forming dwarf galaxies: a Spitzer IRS archival study
B. O'Halloran, S. C. Madden, N. P. Abel
Archival Spitzer observations of 41 starburst galaxies that span a wide range in metallicity reveal for the first time a correlation between the [FeII]/[NeII] 26.0/12.8 micron rati…
The Effects of Doubly Ionized Chemistry on SH+ and S^+2 Abundances in X-ray Dominated Regions
N. P. Abel, S. R. Federman, P. C. Stancil
Recent laboratory measurements for the S^+2 + H2 reaction find a total rate coefficient significantly larger than previously used in theoretical models of X-ray dominated regions (…
[Ne V] Emission in Optically Classified Starbursts
N. P. Abel, S. Satyapal
Detecting Active Galactic Nuclei (AGN) in galaxies dominated by powerful nuclear star formation and extinction effects poses a unique challenge. Due to the longer wavelength emissi…
Spitzer Uncovers Active Galactic Nuclei Missed by Optical Surveys in 7 Late-type Galaxies
S. Satyapal, D. Vega, R. P. Dudik +2
We report the discovery using Spitzers high resolution spectrograph of 7 Active Galactic Nuclei (AGN) in a sample of 32 late-type galaxies that show no definitive signatures of AGN…