KMT-2019-BLG-0842Lb: A Cold Planet Below the Uranus/Sun Mass Ratio

Type of content
Journal Article
Publisher's DOI/URI
Thesis discipline
Degree name
Publisher
Journal Title
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Volume Title
Language
Date
2019
Authors
Jung YK
Udalski A
Zang W
Bond IA
Yee JC
Albrow MD
Chung S-J
Gould A
Han C
Hwang K-H
Abstract

With q=(4.09±0.27)×10−5, KMT-2019-BLG-0842Lb is the second cold planet with planet-host mass ratio q below that of Uranus relative to the Sun (q=4.37×10−5), the first having been discovered only in 2018. Hence, such cold, sub-Uranus-ratio planets are probably not rare. We discuss possible improvements in the search for these planets. The Bayesian estimates for the host mass, planet mass, system distance, and planet-host projected separation are Mhost=0.76±0.40M⊙, Mplanet=10.3±5.5M⊕, DL=3.3±1.3 kpc, and a⊥=3.3±1.4 AU, respectively. The blended light is plausibly due to the host star, an identification that could be tested by high resolution images taken during the next (2020) bulge season.

Description
Citation
Jung YK, Udalski A, Zang W, Bond IA, Yee JC, Albrow MD, Chung S-J, Gould A, Han C, Hwang K-H, Ryu Y-H, Shin I-G, Shvartzvald Y, Cha S-M, Kim D-J, Kim H-W, Kim S-L, Lee C-U, Lee D-J, Lee Y, Park B-G, Pogge RW, Mróz P, Szymański MK, Skowron J, Poleski R, Soszyński I, Pietrukowicz P, Kozłowski S, Ulaczyk K, Rybicki KA, Iwanek P, Wrona M, Abe F, Barry R, Bennett DP, Bhattacharya A, Donachie M, Fujii H, Fukui A, Hirao Y, Itow Y, Kamei Y, Kondo I, Koshimoto N, Li MCA, Matsubara Y, Miyazaki S, Muraki Y, Nagakane M, Ranc C, Rattenbury NJ, Satoh Y, Shoji H, Suematsu H, Sullivan DJ, Sumi T, Suzuki D, Tristram PJ, Yamakawa T, Yamamwaki T, Yonehara A KMT-2019-BLG-0842Lb: A Cold Planet Below the Uranus/Sun Mass Ratio.
Keywords
astro-ph.EP, astro-ph.GA, astro-ph.SR, gravitational lensing: micro
Ngā upoko tukutuku/Māori subject headings
ANZSRC fields of research
Fields of Research::51 - Physical sciences::5101 - Astronomical sciences::510107 - Planetary science (excl. solar system and planetary geology)
Fields of Research::51 - Physical sciences::5101 - Astronomical sciences::510104 - Galactic astronomy
Fields of Research::51 - Physical sciences::5101 - Astronomical sciences::510109 - Stellar astronomy and planetary systems
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All rights reserved unless otherwise stated