The First Neptune Analog or Super-Earth with Neptune-like Orbit: MOA-2013-BLG-605Lb
T. Sumi, A. Udalski, D.P. Bennett, A. Gould, R. Poleski, I.A. Bond, N., Rattenbury, R. W. Pogge, T. Bensby, J.P. Beaulieu, J.B. Marquette, V., Batista, S. Brillant, and F. Abe, Y. Asakura, A. Bhattacharya, M. Donachie,, M. Freeman, A. Fukui, Y. Hirao, Y. Itow, N. Koshimoto

TL;DR
This paper reports the discovery of MOA-2013-BLG-605Lb, the first Neptune analog or super-Earth with a Neptune-like orbit, revealing that such low-mass planets at wide separations are likely common in the galaxy.
Contribution
It presents the first detection of a Neptune-like exoplanet with a Neptune-like orbit, introduces a new degeneracy in microlensing parallax analysis, and discusses implications for planet formation.
Findings
Discovery of a Neptune-mass planet at 9-14 times the snow-line.
Identification of a new 'wide degeneracy' in microlensing parallax.
Evidence that low-mass planets with Neptune-like orbits are common.
Abstract
We present the discovery of the first Neptune analog exoplanet or super-Earth with Neptune-like orbit, MOA-2013-BLG-605Lb. This planet has a mass similar to that of Neptune or a super-Earth and it orbits at times the expected position of the snow-line, , which is similar to Neptune's separation of from the Sun. The planet/host-star mass ratio is and the projected separation normalized by the Einstein radius is . There are three degenerate physical solutions and two of these are due to a new type of degeneracy in the microlensing parallax parameters, which we designate "the wide degeneracy". The three models have (i) a Neptune-mass planet with a mass of orbiting a low-mass M-dwarf with a mass of , (ii) a mini-Neptune with…
Peer Reviews
No public reviews on file for this paper yet. If you reviewed it on a platform where reviews are public (OpenReview, ICLR, NeurIPS, ICML), you can paste yours below so the community can read it here.
Videos
No videos yet. Explain this paper in a talk, walkthrough, or lecture? Add one.
