The Kinematics of the Sagittarius Stream Measured with Blue Horizontal Branch Stars.

Details The Kinematics of the Sagittarius Stream Measured with Blue Horizontal Branch Stars. The Kinematics of the Sagittarius Stream Measured with Blue Horizontal Branch Stars.

May 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007aas...210.8505z&link_type=abstract

American Astronomical Society Meeting 210, #85.05; Bulletin of the American Astronomical Society, Vol. 39, p.194

Astronomy and Astrophysics

Astronomy

Scientific paper

We use photometric and spectroscopic data from the Sloan Digital Sky Survey to isolate and study the kinematics of stars associated with the Sagittarius streams. These features are thought to be the tidal debris of the disrupting Sagittarius dwarf galaxy. In order to trace this substructure, blue horizontal branch stars are identified photometrically. The obvious advantage of using BHB stars to probe the Galactic halo is that they are standard candles and hence provide distance determinations with accuracies of tens of percent. Stellar velocities obtained by SDSS are accurate to 10 to 30 km/s, and are available for over 10,000 A-colored stars. Our sample ranges 15.5

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