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Is the sky falling? Searching for stellar streams in the local Milky Way disc in the CORAVEL and RAVE surveys
G. M. Seabroke, G. Gilmore, A. Siebert +19
We have searched for in-falling stellar streams on to the local Milky Way disc in the CORAVEL and RAVE surveys. The CORAVEL survey consists of local dwarf stars (Nordstrom et al. G…
Dark-Matter Content of Early-Type Galaxies with Planetary Nebulae
N. R. Napolitano, A. J. Romanowsky, L. Coccato +10
We examine the dark matter properties of nearby early-type galaxies using planetary nebulae (PNe) as mass probes. We have designed a specialised instrument, the Planetary Nebula Sp…
Halo Star Streams in the Solar Neighborhood
Amanda A. Kepley, Heather L. Morrison, Amina Helmi +6
We have assembled a sample of halo stars in the solar neighborhood to look for halo substructure in velocity and angular momentum space. Our sample includes red giants, RR Lyrae, a…
Keck spectroscopy and Spitzer Space Telescope analysis of the outer disk of the Triangulum Spiral Galaxy M33
David L. Block, Francoise Combes, Ivanio Puerari +11
In an earlier study of the spiral galaxy M33, we photometrically identified arcs or outer spiral arms of intermediate age (0.6 Gyr - 2 Gyr) carbon stars precisely at the commenceme…
The Kinematics of Intracluster Planetary Nebulae and the On-Going Subcluster Merger in the Coma Cluster Core
Ortwin Gerhard, Magda Arnaboldi, Kenneth C. Freeman +3
The Coma cluster is the richest and most compact of the nearby clusters, yet there is growing evidence that its formation is still on-going. With a new multi-slit imaging spectrosc…
Kinematic Substructures in the Coma Cluster Core as traced by Intracluster Planetary Nebulae
Magda Arnaboldi, Ortwin Gerhard, Kenneth C. Freeman +3
The Coma cluster is the richest and most compact of the nearby clusters, yet there is growing evidence that its formation is still on-going. A sensitive probe of this evolution is…
An HI survey of six Local Group analogs: I. Survey description and the search for high-velocity clouds
D. J. Pisano, D. G. Barnes, B. K. Gibson +3
We have conducted an HI 21 cm emission-line survey using the Parkes 20cm multibeam instrument and the Australia Telescope Compact Array (ATCA) of six loose groups of galaxies chose…