564 citations · 1.4k across the 18 of their papers we have counts for
8 papers · 2 filters
Investigating The Possible Anomaly Between Nebular and Stellar Oxygen Abundances in the Dwarf Irregular Galaxy WLM
Henry Lee, Evan D. Skillman, Kim A. Venn
We obtained new optical spectra of 13 H II regions in WLM with EFOSC2; oxygen abundances are derived for nine H II regions. The temperature-sensitive [O III] 4363 emission line was…
Stellar Populations of Dwarf Elliptical Galaxies: UBVRI Photometry of Dwarf Elliptical Galaxies in the Virgo Cluster
L. van Zee, E. J. Barton, E. D. Skillman
We present UBVRI surface photometry for 16 dwarf elliptical galaxies in the Virgo Cluster with previously measured kinematic properties. The global optical colors are red, with med…
Rotationally Supported Virgo Cluster Dwarf Elliptical Galaxies: Stripped Dwarf Irregular Galaxies?
L. van Zee, E. D. Skillman, M. P. Haynes
New observations of 16 dwarf elliptical galaxies in the Virgo Cluster indicate that at least seven dEs have significant velocity gradients along their optical major axis, with typi…
New BBN limits on Physics Beyond the Standard Model from He4
Richard H. Cyburt, Brian D. Fields, Keith A. Olive +1
A recent analysis of the He4 abundance determined from observations of extragalactic HII regions indicates a significantly greater uncertainty for the He4 mass fraction. The derive…
HI Observations of the Local Group Dwarf WLM
Dale C. Jackson, Evan D. Skillman, John M. Cannon +1
We present Australia Telescope Compact Array mosaic HI imaging of the Local Group dwarf irregular galaxy WLM. We find an integrated flux of 149 Jy km/s and a total HI mass of 3.2 x…
Chemical Abundances of H II Regions in the Starburst Galaxy NGC 1705
Henry Lee, Evan D. Skillman
(Shortened version) We report optical spectroscopy of 16 H II regions in NGC 1705 and [O III] 4363 detections for the first time in five H II regions. The resulting mean oxygen abu…