446 citations · 1.9k across the 76 of their papers we have counts for
Showing 1998 · astro-phShow all
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astro-ph1998
Physical Conditions in the Orion HII Region
Gary J. Ferland
The Orion Nebula is the defining galactic HII Region, and has been well studied over a broad range of wavelengths. The gas-phase metallicity is 2/3 of solar, close to the star clus…
astro-ph1998
The PG X-Ray QSO Sample: Links among X-ray, UV & Optical Spectra
Beverley J. Wills, M. S. Brotherton, A. Laor +3
A unique, essentially complete sample of 22 QSOs, with high quality soft X-ray spectra from ROSAT, as well as HST and optical spectrophotometry from below Ly-alpha to above H-alpha…