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The Arecibo Legacy Fast ALFA Survey: The alpha.40 HI Source Catalog, its Characteristics and their Impact on the Derivation of the HI Mass Function
Martha P. Haynes, Riccardo Giovanelli, Ann M. Martin +21
We present a current catalog of 21 cm HI line sources extracted from the Arecibo Legacy Fast Arecibo L-band Feed Array (ALFALFA) survey over ~2800 square degrees of sky: the alpha.…
Wheels of Fire IV. Star Formation and the Neutral Interstellar Medium in the Ring Galaxy AM0644-741
James L. Higdon, Sarah J. U. Higdon, Richard J. Rand
We combine data from the ATNF and the SEST to investigate the neutral ISM in AM0644-741, a large and robustly star-forming ring galaxy. The galaxy's ISM is concentrated in the 42-k…
HST Morphologies of z ~ 2 Dust-Obscured Galaxies II: Bump Sources
R. S. Bussmann, Arjun Dey, J. Lotz +11
We present Hubble Space Telescope (HST) imaging of 22 ultra-luminous infrared galaxies (ULIRGs) at z~2 with extremely red R-[24] colors (called dust-obscured galaxies, or DOGs) whi…
The Energetics of Molecular Gas in NGC 891 from H2 and FIR Spectroscopy
G. J. Stacey, V. Charmandaris, F. Boulanger +5
We have studied the molecular hydrogen energetics of the edge-on spiral galaxy NGC\,891, using a 34-position map in the lowest three pure rotational H lines observed with the S…
Why Are Ring Galaxies Interesting?
James L. Higdon, Sarah J. U. Higdon
Compared with ordinary spirals, the ISM in ring galaxies experiences markedly different physical conditions and evolution. As a result, ring galaxies provide interesting perspectiv…
Star Formation and the Interstellar Medium in Nearby Tidal Streams (SAINTS)
S. J. U. Higdon, J. L. Higdon, B. J. Smith +2
We compare Spitzer Infrared Spectrograph observations of SQ-A & SQ-B in Stephan's Quintet, Ambartzumian's knot in Arp 105, Arp 242-N3, Arp 87-N1, a bridge star forming region, NGC…