325 citations · 5.6k across the 124 of their papers we have counts for
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Isolated Star Formation: A Compact HII Region in the Virgo Cluster
Ortwin Gerhard, Magda Arnaboldi, Kenneth C. Freeman +1
We report on the discovery of an isolated, compact HII region in the Virgo cluster. The object is located in the diffuse outer halo of NGC 4388, or could possibly be in intracluste…
Narrow band imaging in [OIII] and Halpha to search for ICPNe in the Virgo cluster
M. Arnaboldi, K. C. Freeman, S. Okamura +17
We have identified intracluster planetary nebulae in a Virgo cluster core field by imaging with the Subaru Suprime-Cam through two narrow band filters centered at the redshifted wa…
Modern Techniques in Galaxy Kinematics: CDI and the Planetary Nebula Spectrograph
N. G. Douglas, K. Kuijken, A. J. Romanowsky +4
We report here the successful commissioning of the PN.Spectrograph, the first special-purpose instrument for the measurement of galaxy kinematics through the PN population