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16 papers · 1 filter
The Interstellar Medium of Star-forming Irregular Galaxies: The View with ISO
D. Hunter, M. Kaufman, D. Hollenbach +8
We present mid-infrared imaging and far-infrared (FIR) spectroscopy of 5 IBm galaxies observed by ISO as part of our larger study of the inter- stellar medium of galaxies. Most of…
Ultraviolet and Optical Observations of OB Associations and Field Stars in the Southwest Region of the Large Magellanic Cloud
Joel Wm. Parker, Dennis Zaritsky, Theodore P. Stecher +2
Using photometry from the Ultraviolet Imaging Telescope (UIT) and photometry and spectroscopy from three ground-based optical datasets we have analyzed the stellar content of OB as…
Precise Masses for Wolf 1062 AB from Hubble Space Telescope Interferometric Astrometry and McDonald Observatory Radial Velocities
G. F. Benedict, B. E. McArthur, O. G. Franz +17
We present an analysis of astrometric data from FGS 3, a white-light interferometer on {\it HST}, and of radial velocity data from two ground-based campaigns. We model the astromet…
A Search for Wolf-Rayet Stars in the Small Magellanic Cloud
Phil Massey, Alaine Duffy
We conducted an extensive search for Wolf-Rayet stars (W-Rs) in the SMC, using the same interference filter imaging techniques that have proved successful in finding W-Rs in more d…
The Progenitor Masses of Wolf-Rayet Stars and Luminous Blue Variables Determined from Cluster Turn-offs. II. Results from 12 Galactic Clusters and OB Associations
P. Massey, K. DeGioia-Eastwood, E. Waterhouse
Here we examine 12 Galactic clusters and OB associations containing Wolf-Rayet stars (W-Rs) and/or Luminous Blue Variables (LBVs), in order to assess the progentor masses of these…
The Star Clusters in the Irregular Galaxy NGC 4449
Andrea E. Gelatt, Deidre A. Hunter, J. S. Gallagher
We examine the star clusters in the irregular galaxy NGC 4449. We use a near-infrared spectrum and broad-band images taken with the HST to place a limit of 8--15 Myrs on the age of…