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

  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},
  • 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… 

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