399 citations · 1k across the 28 of their papers we have counts for
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astro-ph1999★ 139 cited
Kretschmann Scalar for a Kerr-Newman Black Hole
Richard C. Henry
I have derived the Kretschmann scalar for a general black hole of mass m, angular momentum per unit mass a, and electric charge Q. The Kretschmann scalar gives the amount of curvat…
astro-ph1999
Abundance Patterns in Planetary Nebulae
Karen B. Kwitter, Richard C. Henry
We previously determined abundances of He, C, N, O, and Ne for a sample of planetary nebulae (PNe) representing a broad range in progenitor mass and metallicity, and we now compare…
astro-ph1999★ 37 cited
Diffuse Background Radiation
Richard C. Henry
A new determination of the upper limit to the cosmic diffuse background radiation, at ~110 nm, of 300 photons s-1 cm-2 sr-1 nm-1, is placed in the context of diffuse background mea…