An Earth-mass Planet in a 1 au Orbit around an Ultracool Dwarf

@article{Shvartzvald2017AnEP,
  title={An Earth-mass Planet in a 1 au Orbit around an Ultracool Dwarf},
  author={Y. Shvartzvald and J. Yee and S. Novati and A. Gould and C.-U. Lee and C. Beichman and G. Bryden and S. Carey and B. Gaudi and C. Henderson and W. Zhu and M. Albrow and S. Cha and S. Chung and C. Han and K. Hwang and Y. K. Jung and D. Kim and H.-W. Kim and S.-L. Kim and Y. Lee and B.-G. Park and R. Pogge and Y. Ryu and I. Shin},
  journal={The Astrophysical Journal},
  year={2017},
  volume={840}
}
We combine Spitzer and ground-based Korea Microlensing Telescope Network microlensing observations to identify and precisely measure an Earth-mass (1.43^(+0.45)_(-0.32) M⊕) planet OGLE-2016-BLG-1195Lb at 1.16^(+0.16)_(-0.13) au orbiting a 0.078^(+0.016)_(-0.012) M⊙ ultracool dwarf. This is the lowest-mass microlensing planet to date. At 3.91^(+0.42)_(-0.46) kpc, it is the third consecutive case among the Spitzer "Galactic distribution" planets toward the Galactic bulge that lies in the Galactic… Expand

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