Characterizing Halo Substructure with Kapteyn Proper-Motion and with SDSS/SEGUE Data

Details Characterizing Halo Substructure with Kapteyn Proper-Motion and with SDSS/SEGUE Data Characterizing Halo Substructure with Kapteyn Proper-Motion and with SDSS/SEGUE Data

Jan 2012

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2012aas...21922204c&link_type=abstract

American Astronomical Society, AAS Meeting #219, #222.04

Astronomy and Astrophysics

Astronomy

Scientific paper

The Kapteyn survey is aimed at obtaining 3D velocities for stars in streams and overdensities found in the halo from large-area photometric surveys. While our main focus are proper-motion determinations, we also obtain radial velocities from our own program as well as from SEGUE.
To date, this survey has provided most of the existing 3D kinematical data accurate enough to characterize such substructure, including modeling of Sagittarius's tidal trailing tail, velocities in the Anticenter/Monoceros structure and in the Virgo Stellar Stream.
Here we briefly describe the survey, show comparisons with existing deep proper-motion surveys and summarize recent results. Next, we focus on new results obtained in the Virgo Stellar Stream and in the Anticenter/Monoceros structure.

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