KMT-2016-BLG-1836Lb: A Super-Jovian Planet from a High-cadence Microlensing Field

Journal Article · Sun Mar 01 00:00:00 EST 2020 · Astronomical Journal (Online)

DOI:https://doi.org/10.3847/1538-3881/AB660E· OSTI ID:23013139

Yang, Hongjing; Zhang, Xiangyu; Zang, Weicheng; Wang, Tianshu; Mao, Shude ^[1]; Hwang, Kyu-Ha; Chung, Sun-Ju; Jung, Youn Kil; Ryu, Yoon-Hyun; Shin, In-Gu; Cha, Sang-Mok; Kim, Dong-Jin ^[2]; Gould, Andrew ^[3]; Albrow, Michael D. ^[4]; Han, Cheongho ^[5]; Shvartzvald, Yossi ^[6]; Yee, Jennifer C. ^[7]; Zhu, Wei ^[8]; Penny, Matthew T. ^[9]; Fouqué, Pascal ^[10] ; others, and

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1. Department of Astronomy and Tsinghua Centre for Astrophysics, Tsinghua University, Beijing 100084 (China)
2. Korea Astronomy and Space Science Institute, Daejon 34055 (Korea, Republic of)
3. Max-Planck-Institute for Astronomy, Königstuhl 17, D-69117 Heidelberg (Germany)
4. University of Canterbury, Department of Physics and Astronomy, Private Bag 4800, Christchurch 8020 (New Zealand)
5. Department of Physics, Chungbuk National University, Cheongju 28644 (Korea, Republic of)
6. IPAC, Mail Code 100-22, Caltech, 1200 E. California Boulevard, Pasadena, CA 91125 (United States)
7. Center for Astrophysics, Harvard & Smithsonian, 60 Garden Street, Cambridge, MA 02138 (United States)
8. Canadian Institute for Theoretical Astrophysics, University of Toronto, 60 St. George Street, Toronto, ON M5S 3H8 (Canada)
9. Department of Astronomy, The Ohio State University, 140 W. 18th Avenue, Columbus, OH 43210 (United States)
10. CFHT Corporation, 65-1238 Mamalahoa Hwy, Kamuela, HI 96743 (United States)

We report the discovery of a super-Jovian planet in the microlensing event KMT-2016-BLG-1836, which was found by the Korea Microlensing Telescope Network (KMTNet) high-cadence observations (Γ~4 hr^-1). The planet–host mass ratio q ~ 0.004. A Bayesian analysis indicates that the planetary system is composed of a super-Jovian M{_planet=2.2_-1.1^+1.9M_J planet orbiting an M or K dwarf, M{_host=0.49_-0.25^0.38M_⊙, at a distance of D_L=7.1_-2.4}^+0.8 kpc. The projected planet–host separation is 3.5_-0.9^+1.1 au, implying that the planet is located beyond the snow line of the host star. Future high-resolution images can potentially strongly constrain the lens brightness and thus the mass and distance of the planetary system. Without considering detailed detection efficiency, selection, or publication biases, we find a potential mass-ratio desert at -3.7 ≲ log q ≲ -3.0 for the 31 published KMTNet planets.

• OSTI ID: 23013139
• Journal Information: Astronomical Journal (Online), Vol. 159, Issue 3; Other Information: Country of input: International Atomic Energy Agency (IAEA); ISSN 1538-3881
• Country of Publication: United States
• Language: English

Related Subjects

79 ASTROPHYSICS
COSMOLOGY AND ASTRONOMY
BRIGHTNESS
DISTANCE
MASS
PLANETS
STARS
TELESCOPES