Astronomy and Astrophysics – Astronomy
Scientific paper
Dec 2006
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006aas...209.2710p&link_type=abstract
2007 AAS/AAPT Joint Meeting, American Astronomical Society Meeting 209, #27.10; Bulletin of the American Astronomical Society, V
Astronomy and Astrophysics
Astronomy
Scientific paper
Globular cluster tidal streams are of interest for what they can tell us of the dynamical evolution of the clusters and of our Galaxy. Recent studies have used photometric and statistical subtraction methods to attempt to separate potential streams from the field stars that contaminate the samples. We chose instead as our primary method to use photometry to select blue stars that match the horizontal branch of the clusters. We then make spectroscopic observations of these candidates to determine their metallicity and radial velocities. Combining these results with the photometric data offers a better picture of the structure and validity of tidal streams. We present photometric and spectroscopic results for several globular clusters and their surrounding fields. Data were obtained at McDonald Observatory, Kitt Peak, and Las Campanas Observatory. SDSS data were also used.
WLP acknowledges the support of a Sigma Xi Grant-In-Aid of research. RW acknowledges the support of a AAS Small Research Grant.
Lauchner Adam
McWilliam Andrew
Powell William L.
Wilhelm Rainer
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