| |
 |
| Paper: |
Halo Structure Traced by SDSS RR Lyrae |
| Volume: |
327, Satellites and Tidal Streams |
| Page: |
104 |
| Authors: |
Ivezic, Z.; Lupton, R.; Schlegel, D.; Smolcic, V.; Johnston, D.; Gunn, J.; Knapp, J.; Strauss, M.; Rockosi, C.; SDSS Collaboration |
| Abstract: |
We discuss the density and radial velocity distributions of over 3000 RR Lyrae stars selected by various methods using Sloan Digital Sky Survey data for about 1000 deg2 of sky. This is more than 20 times larger a sample than previously reported by SDSS (Ivezic et al. 2000), and includes RR Lyrae stars out to the sample limit of 100 kpc. A cut-off in the radial distribution of halo RR Lyrae at ∼50-60 kpc suggested by the early SDSS data appears to be a statistical anomaly confined to a small region (∼100 deg2). Despite the large increase in observed area, the most prominent features remain those associated with the Sgr dwarf tidal stream. We find multiple number density peaks along three lines of sight in the Sgr dwarf tidal stream plane that may indicate several perigalactic passages of the Sgr dwarf galaxy. |
|
|
|
|
|
