The Bulge Radial Velocity Assay for RR Lyrae stars (BRAVA-RR) DR2: a Bimodal Bulge?

@article{Kunder2020TheBR,
  title={The Bulge Radial Velocity Assay for RR Lyrae stars (BRAVA-RR) DR2: a Bimodal Bulge?},
  author={A. Kunder and A. P{\'e}rez-Villegas and R. Rich and Jonathan Ogata and Emma Murari and Emilie Boren and Christian I. Johnson and D. Nataf and A. Walker and G. Bono and A. Koch and R. Propris and J. Storm and J. Wojno},
  journal={arXiv: Solar and Stellar Astrophysics},
  year={2020}
}
Radial velocities of 2768 fundamental mode RR Lyrae stars (RRLs) toward the Southern Galactic bulge are presented, spanning the southern bulge from -8 500 km/s and find that the majority of these high-velocity stars are halo interlopers; it is unclear if a sub-sample of these stars with similar space velocities have a common origin. Once the 25% of the sample represented by halo interlopers is cleaned, we can clearly discern two populations of bulge RRLs in the inner Galaxy. One population of… Expand

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