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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…
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…
The Star Clusters in the Starburst Irregular Galaxy NGC 1569
D. A. Hunter, R. W. O'Connell, J. S. Gallagher +1
We examine star clusters in the irregular, starburst galaxy NGC 1569 from HST images. In addition to the two known super star clusters, we identify 45 other clusters that are compa…
Probing the Interstellar Medium in Early type galaxies with ISO observations
S. Malhotra, D. Hollenbach, G. Helou +9
Four IRAS-detected early type galaxies were observed with ISO. With the exception of the 15 micron image of NGC1052, the mid-IR emission from NGC1052, NGC1155, NGC5866 and NGC6958…
Identifying Old Tidal Dwarf Irregulars
Deidre A. Hunter, Sally D. Hunsberger, Erin W. Roye
We examine the observational consequences of the two possible origins for irregular galaxies: formation from collapse of a primordial cloud of gas early in the age of the Universe,…
Mid-Infrared Observations of Normal Star-Forming Galaxies: The Infrared Space Observatory Key Project Sample
Daniel A. Dale, Nancy A. Silbermann, George Helou
We present mid-infrared maps and preliminary analysis for 61 galaxies observed with the ISOCAM instrument aboard the Infrared Space Observatory. Many of the general features of gal…