175 citations · 751 across the 15 of their papers we have counts for
15 papers
Planetary Nebulae: Sources of Enlightenment
Karen B. Kwitter, R. B. C. Henry
In this review/tutorial we explore planetary nebulae as a stage in the evolution of low-to-intermediate-mass stars, as major contributors to the mass and chemical enrichment of the…
The Chemical Evolution of Carbon, Nitrogen, and Oxygen in Metal-Poor Dwarf Galaxies
Danielle A. Berg, Dawn K. Erb, Richard B. C. Henry +2
Ultraviolet nebular emission lines are important for understanding the time evolution and nucleosynthetic origins of their associated elements, but the underlying trends of their r…
Carbon and Oxygen Abundances in Low Metallicity Dwarf Galaxies
Danielle A. Berg, Evan D. Skillman, Richard B. C. Henry +2
The study of carbon and oxygen abundances yields information on the time evolution and nucleosynthetic origins of these elements, yet remains relatively unexplored. At low metallic…
Co-spatial Long-slit UV/Optical Spectra of Ten Galactic Planetary Nebulae with HST/STIS II. Nebular Models, Central Star Properties and He+CNO Synthesis
R. B. C. Henry, B. Balick, R. J. Dufour +5
The goal of the present study is twofold. First, we employ new HST/STIS spectra and photoionization modeling techniques to determine the progenitor masses of eight planetary nebula…
Alpha Element Abundances in a Large Sample of Galactic Planetary Nebulae
J. B. Milingo, K. B. Kwitter, R. B. C. Henry +1
We present emission line strengths, abundances, and element ratios (X/O for Ne, S, Cl, and Ar) for a sample of 38 Galactic disk planetary nebulae (PNe) consisting primarily of Peim…
A Multiwavelength Analysis of the Halo Planetary Nebula DdDm-1
R. B. C. Henry, K. B. Kwitter, R. J. Dufour +1
We present new HST optical imagery as well as new UV and IR spectroscopic data obtained with the Hubble and Spitzer Space Telescopes, respectively, of the halo planetary nebula DdD…