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Two Populations of Young Massive Star Clusters in Arp 220
Christine D. Wilson, William E. Harris, Rebecca Longden +1
We present new optical observations of young massive star clusters in Arp 220, the nearest ultraluminous infrared galaxy, taken in UBVI with the Hubble Space Telescope ACS/HRC came…
The Elongations and Supersonic Motions of Molecular Clouds
Jin Koda, Tsuyoshi Sawada, Tetsuo Hasegawa +1
New 13CO data from the BU-FCRAO Milky Way Galactic Ring Survey (GRS) are analyzed to understand the shape and internal motions of molecular clouds. For a sample of more than five h…
Star Formation in NGC5194 (M51a): The Panchromatic View from GALEX to Spitzer
D. Calzetti, R. C. Kennicutt, L. Bianchi +32
(Abridged) Far ultraviolet to far infrared images of the nearby galaxy NGC5194, from Spitzer, GALEX, Hubble Space Telescope and ground--based data, are used to investigate local an…
HCN and HCO+ Observations of the Galactic Circumnuclear Disk
M. H. Christopher, N. Z. Scoville, S. R. Stolovy +1
We present high spatial resolution (5.1" x 2.7") OVRO millimeter array observations of HCN (J=1-0) and HCO+ (J=1-0) emission in the inner 3 pc of the galaxy. The HCN and HCO+ emiss…