The Warm Neptunes around HD 106315 Have Low Stellar Obliquities

@article{Zhou2018TheWN,
  title={The Warm Neptunes around HD 106315 Have Low Stellar Obliquities},
  author={George Zhou and Joseph E. Rodriguez and Andrew M. Vanderburg and Samuel N. Quinn and Jonathan M. Irwin and Chelsea X. Huang and David W. Latham and Allyson Bieryla and Gilbert A. Esquerdo and Perry L. Berlind and M. Calkins},
  journal={The Astronomical Journal},
  year={2018}
}
We present the obliquity of the warm Neptune HD 106315c measured via a series of spectroscopic transit observations. HD 106315c is a 4.4 REarth warm Neptune orbiting a moderately rotating late F-star with a period of 21.05 days. HD 106315 also hosts a 2.5 REarth super-Earth on a 9.55 day orbit. Our Doppler tomographic analyses of four transits observed by the Magellan/MIKE, HARPS, and TRES facilities find HD 106315c to be in a low stellar obliquity orbit, consistent with being well aligned with… 
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