34 citations · 34 across the 1 of their papers we have counts for
5 papers
A Detailed Look at Chemical Abundances in Magellanic Cloud Planetary Nebulae. I. The Small Magellanic Cloud
Richard A. Shaw, Ting-Hui Lee, Letizia Stanghellini +8
We present an analysis of elemental abundances of He, N, O, Ne, S, and Ar in Magellanic Cloud planetary nebulae (PNe), and focus initially on 14 PNe in the Small Magellanic Cloud (…
Slitless Spectroscopy of LMC Planetary Nebulae. A Study of the Emission Lines and Morphology
Letizia Stanghellini, Richard A. Shaw, Max Mutchler +3
HST STIS slitless spectroscopy of LMC PNs is the ideal tool to study their morphology and their ionization structures at once. We present the results from a group of 29 PNs that ha…
Hubble Space Telescope Expansion Parallaxes of the Planetary Nebulae NGC 6578, NGC 6884, NGC 6891, and IC 2448
Stacy Palen, Bruce Balick, Arsen R. Hajian +3
We have combined two epochs of Hubble Space Telescope WFPC2 imaging data with ground-based expansion velocities to determine distances to three planetary nebulae (NGC 6578, NGC 688…
Polarization and Extent of Maser Emission from Late-Type Stars: Support for a Plasma Turbulence Model of Maser Production
Stacy Palen
The integrated spectrum of OH emission from late-type stars is often circularly polarized, by as much as 50% in some cases. While the spectra are partially polarized, the individua…
Models of OH Maser Variations in U Her
Stacy Palen, John D. Fix
Arecibo spectra of the mainline OH maser emission from U Her over more than a decade show variations of the OH emission over these time scales. These observations are combined with…