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A Spectacular H Complex in Virgo: Evidence for a Collision Between M86 and NGC 4438 and Implications for Collisional ISM Heating of Ellipticals
J. D. P. Kenney, T. Tal, H. H. Crowl +2
Deep wide-field H+[NII] imaging around the Virgo cluster giant elliptical galaxy M86 reveals a highly complex and disturbed ISM/ICM. The most striking feature is a set of H f…
Planetary Nebulae in Face-On Spiral Galaxies. I. Planetary Nebula Photometry and Distances
Kimberly A. Herrmann, Robin Ciardullo, John J. Feldmeier +1
As the first step to determine disk mass-to-light ratios for normal spiral galaxies, we present the results of an imaging survey for planetary nebulae (PNe) in six nearby, face-on…
Expansion velocities and core masses of bright planetary nebulae in the Virgo cluster
Magda Arnaboldi, Michelle Doherty, Ortwin Gerhard +5
The line-of-sight velocities and [OIII] 5007 AA expansion velocities are measured for 11 planetary nebulae (PNs) in the Virgo cluster core, at 15 Mpc distance, with the FLAMES spec…
Ly-alpha Emission-Line Galaxies at z = 3.1 in the Extended Chandra Deep Field South
C. Gronwall, R. Ciardullo, T. Hickey +13
We describe the results of an extremely deep, 0.28 deg^2 survey for z = 3.1 Ly-alpha emission-line galaxies in the Extended Chandra Deep Field South. By using a narrow-band 5000 An…
Calibrating Type Ia Supernovae using the Planetary Nebula Luminosity Function I. Initial Results
John J. Feldmeier, George H. Jacoby, Mark M. Phillips
We report the results of an [O III] lambda 5007 survey for planetary nebulae (PN) in five galaxies that were hosts of well-observed Type Ia supernovae: NGC 524, NGC 1316, NGC 1380,…
The Resolved Stellar Populations of a Dwarf Spheroidal Galaxy in the Virgo Cluster
Patrick R. Durrell, Benjamin F. Williams, Robin Ciardullo +11
We report on the discovery of a faint (M_V ~ -10.6 +/- 0.2) dwarf spheroidal galaxy on deep F606W and F814W Hubble Space Telescope images of a Virgo intracluster field. The galaxy…