• DOI:10.1111/j.1745-3933.2006.00198.x
• Corpus ID: 14784777

Spatial and velocity clumping in a Sloan Digital Sky Survey blue horizontal branch star catalogue

@article{Kinman2006SpatialAV,
  title={Spatial and velocity clumping in a Sloan Digital Sky Survey blue horizontal branch star catalogue},
  author={L. ClewleyT.D. Kinman},
  journal={Monthly Notices of the Royal Astronomical Society: Letters},
  year={2006},
  volume={371}
}

• L. C. Kinman
• Published 31 May 2006
• Physics, Geology
• Monthly Notices of the Royal Astronomical Society: Letters

We present evidence for eight new clumps of blue horizontal branch (BHB) stars discovered in a catalogue of these stars compiled from the Sloan Digital Sky Survey (SDSS) by Sirko et al. published in 2004. Clumps are identified by selecting pairs of stars separated by distances 6 2 kpc and with differences in galactocentric radial velocities < 25 km/s. Each clump contains four or more stars. Four of the clumps have supporting evidence: two of them also contain overdensities of RR Lyrae stars which makes their reality very likely. At least one of the clumps is likely to be associated with the tidal debris of the Sagittarius dwarf spheroidal galaxy. We emphasize that more accurate observations of the radial velocities or proper motions of the stars in the clumps as well as the identification of other halo stars in these regions are required to establish the reality of the remaining clumps.