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Intracluster Planetary Nebulae in Virgo: Photometric selection, spectroscopic validation and cluster depth
M. Arnaboldi, J. A. L. Aguerri, N. R. Napolitano +6
We have imaged an empty area of 34'x34' one and a half degree north of the Virgo cluster core to survey for intracluster planetary nebula candidates. We have implemented and tested…
HIPASS High-Velocity Clouds: Properties of the Compact and Extended Populations
M. E. Putman, V. de Heij, L. Staveley-Smith +5
A catalog of Southern anomalous-velocity HI clouds at Decl. < +2 deg is presented, based on data from the HI Parkes All-Sky Survey (HIPASS). The improved sensitivity (5sigma: T_B =…
The puzzle of the polar structure in NGC 4650A
E. Iodice, M. Arnaboldi, G. De Lucia +3
This work presents new surface photometry and two-dimensional modeling of the light distribution of the Polar Ring Galaxy NGC 4650A, based on near-infrared (NIR) observations and h…
Planetary nebulae as mass tracers of their parent galaxies: biases in the estimate of the kinematical quantities
Nicola R. Napolitano, Magda Arnaboldi, Kenneth C. Freeman +1
Multi-object and multi-fiber spectrographs on 4 and 8 meter telescopes make it possible to use extragalactic planetary nebulae (PNe) in the outer halos of early-type galaxies as ki…
HIPASS Detection of an Intergalactic Gas Cloud in the NGC 2442 Group
S. D. Ryder, B. Koribalski, L. Staveley-Smith +26
We report the discovery, from the HI Parkes All-Sky Survey (HIPASS), of a gas cloud associated with the asymmetric spiral galaxy NGC 2442. This object, designated HIPASS J0731-69,…