888 citations · 2.5k across the 31 of their papers we have counts for
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Stellar Populations at the Center of IC 1613
Andrew A. Cole, Eline Tolstoy, John S. Gallagher +18
We have observed the center of the Local Group dwarf irregular galaxy IC 1613 with WFPC2 aboard the Hubble Space Telescope in the F439W, F555W, and F814W filters. We find a dominan…
WFPC2 Observations of Compact Star Cluster Nuclei in Low Luminosity Spiral Galaxies
Lynn D. Matthews, John S. Gallagher, III +16
We have used the Wide Field Planetary Camera 2 aboard the Hubble Space Telescope to image the compact star cluster nuclei of the nearby, late-type, low-luminosity spiral galaxies N…
The Luminosity Function and Mass Function in the Galactic Bulge
Jon A. Holtzman, Alan M. Watson, William A. Baum +5
We present deep photometry obtained with the Hubble Space Telescope (HST) in a field in Baade's Window in the Galactic bulge. We derive a luminosity function down to I ~ 24.3, or V…
Stellar Populations in Three Outer Fields of the LMC
Marla C. Geha, Jon A. Holtzman, Jeremy R. Mould +16
We present HST photometry for three fields in the outer disk of the LMC extending approximately four magnitudes below the faintest main sequence turnoff. We cannot detect any stron…
Near Infrared Spectroscopy of G29.96-0.02: The First Spectral Classification of the Ionizing Star of an Ultracompact HII Region
Alan M. Watson, Margaret M. Hanson
We have obtained the first classification spectrum and present the first direct spectral classification of the ionizing star of an ultracompact HII region. The ultracompact HII reg…
Direct Observations of the Ionizing Star in the UC HII Region G29.96-0.02: A Strong Constraint on the Stellar Birth Line for Massive Stars
Alan M. Watson, Alison L. Coil, Debra S. Shepherd +2
We have observed the ultracompact HII region G29.96-0.02 in the near infrared J, H, and K bands and in the Br-gamma line. By comparison with radio observations, we determine that t…