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The Effect of Filaments and Tendrils on the HI Content of Galaxies
Mary Crone Odekon, Gregory Hallenbeck, Martha P. Haynes +3
We use the ALFALFA HI survey to examine whether the cold gas reservoirs of galaxies are inhibited or enhanced in large-scale filaments. Our sample includes 9947 late-type galaxies…
HI in Virgo's "Red and Dead" Dwarf Ellipticals - A Tidal Tail and Central Star Formation
Gregory Hallenbeck, Rebecca Koopmann, Riccardo Giovanelli +4
We investigate a sample of 3 dwarf elliptical galaxies in the Virgo Cluster which have significant reservoirs of HI. We present deep optical imaging (from CFHT and KPNO), HI spectr…
(Almost) Dark Galaxies in the ALFALFA Survey: Isolated HI Bearing Ultra Diffuse Galaxies
Lukas Leisman, Martha P. Haynes, Steven Janowiecki +9
We present a sample of 115 very low optical surface brightness, highly extended, HI-rich galaxies carefully selected from the ALFALFA survey that have similar optical absolute magn…
Detection of an Optical Counterpart to the ALFALFA Ultra-compact High Velocity Cloud AGC 249525
William Janesh, Katherine L. Rhode, John J. Salzer +5
We report on the detection at 98% confidence of an optical counterpart to AGC 249525, an Ultra-Compact High Velocity Cloud (UCHVC) discovered by the ALFALFA blind neutral hydrog…