OGLE-2016-BLG-1093Lb: A Sub-Jupiter-mass Spitzer Planet Located in the Galactic Bulge

In-Gu Shin , Jennifer C. Yee , Kyu-Ha Hwang , Andrew Gould , Andrzej Udalski , Ian A. Bond , Michael D. Albrow , Sun-Ju Chung , Cheongho Han , Youn Kil Jung , Hyoun Woo Kim , Yoon-Hyun Ryu , Yossi Shvartzvald , Weicheng Zang , Sang-Mok Cha , Dong-Jin Kim , Seung-Lee Kim , Chung-Uk Lee , Dong-Joo Lee , Yongseok Lee , Byeong-Gon Park , Richard W. Pogge , Przemek Mróz , Michał K. Szymański , Jan Skowron , Radek Poleski , Igor Soszyński , Paweł Pietrukowicz , Szymon Kozłowski , Krzysztof Ulaczyk , Charles A. Beichman , Geoffery Bryden , Sebastiano Calchi Novati , Sean Carey , B. Scott Gaudi , Calen B. Henderson , Wei Zhu , Fumio Abe , Richard K. Barry , David P. Bennett , Aparna Bhattacharya , Hirosane Fujii , Akihiko Fukui , Yuki Hirao , Yoshitaka Itow , Rintaro Kirikawa , Naoki Koshimoto , Iona Kondo , Yutaka Matsubara , Sho Matsumoto , Shota Miyazaki , Yasushi Muraki , Greg Olmschenk , Arisa Okamura , Clément Ranc (1) , Nicholas J. Rattenbury , Yuki Satoh , Stela Ishitani Silva , Takahiro Sumi , Daisuke Suzuki , Taiga Toda , Paul J. Tristram , Aikaterini Vandorou , Hibiki Yama

1 IAP - Institut d'Astrophysique de Paris

OGLE-2016-BLG-1093 is a planetary microlensing event that is part of the statistical Spitzer microlens parallax sample. The precise measurement of the microlens parallax effect for this event, combined with the measurement of finite-source effects, leads to a direct measurement of the lens masses and system distance, M _host =0.38-0.57 M _⊙ and m _p = 0.59-0.87 M _Jup, and the system is located at the Galactic bulge (D _L ~ 8.1 kpc). Because this was a high-magnification event, we are also able to empirically show that the "cheap-space parallax" concept produces well-constrained (and consistent) results for ∣π _E∣. This demonstrates that this concept can be extended to many two-body lenses. Finally, we briefly explore systematics in the Spitzer light curve in this event and show that their potential impact is strongly mitigated by the color constraint.

Mots clés: Gravitational microlensing exoplanet detection; Satellite microlensing parallax; Astrophysics - Earth and Planetary Astrophysics; Astrophysics - Astrophysics of Galaxies

Domaines: Planète et Univers [physics]; Astrophysique [astro-ph]

In-Gu Shin, Jennifer C. Yee, Kyu-Ha Hwang, Andrew Gould, Andrzej Udalski, et al.. OGLE-2016-BLG-1093Lb: A Sub-Jupiter-mass Spitzer Planet Located in the Galactic Bulge. The Astronomical Journal, 2022, 163, ⟨10.3847/1538-3881/ac6513⟩. ⟨insu-03748260⟩