234 citations · 419 across the 8 of their papers we have counts for
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The Unusual Object IC 2144/MWC 778
G. H. Herbig, William D. Vacca
IC 2144 is a small reflection nebula located in the zone of avoidance near the Galactic anticenter. It has been investigated here largely on the basis of Keck/HIRES optical spectro…
Young star clusters in interacting galaxies - NGC 1487 and NGC 4038/4039
Sabine Mengel, Matthew D. Lehnert, Niranjan A. Thatte +3
We estimate the dynamical masses of several young (~10 Myr) massive star clusters in two interacting galaxies, NGC 4038/4039 ("The Antennae") and NGC 1487, under the assumption of…
Oph 1622-2405: Not a Planetary-Mass Binary
K. L. Luhman, K. N. Allers, D. T. Jaffe +4
We present an analysis of the mass and age of the young low-mass binary Oph 1622-2405. Using resolved optical spectroscopy of the binary, we measure spectral types of M7.25+/-0.25…
A census of the Wolf-Rayet content in Westerlund 1 from near-infrared imaging and spectroscopy
Paul A. Crowther, L. J. Hadfield, J. S. Clark +2
New NTT/SOFI imaging and spectroscopy of the Wolf-Rayet population in Westerlund 1 are presented. Narrow-band near-IR imaging together with follow up spectroscopy reveals four new…
Ultracompact Blue Dwarf Galaxies: Hubble Space Telescope Imaging and Stellar Population Analysis
Michael R. Corbin, William D. Vacca, Roberto Cid Fernandes +3
We present deep Hubble Space Telescope Advanced Camera for Surveys / High Resolution Channel U, narrow-V, and I images of nine "ultracompact" blue dwarf galaxies (UCBDs) selected f…
Low Carbon Abundance in Type Ia Supernovae
G. H. Marion, P. Hoeflich, J. C. Wheeler +3
We investigate the quantity and composition of unburned material in the outer layers of three normal Type Ia supernovae (SNe Ia): 2000dn, 2002cr and 20 04bw. Pristine matter from a…