Yuki Hirao
OGLE-2017-BLG-0406: Spitzer Microlens Parallax Reveals Saturn-mass Planet Orbiting M-dwarf Host in the Inner Galactic Disk
Hirao, Yuki; Bennett, David P.; Ryu, Yoon-Hyun; Koshimoto, Naoki; Udalski, Andrzej; Yee, Jennifer C.; Sumi, Takahiro; Bond, Ian A.; Shvartzvald, Yossi; Abe, Fumio; Barry, Richard K.; Bhattacharya, Aparna; Donachie, Martin; Fukui, Akihiko; Itow, Yoshitaka; Kondo, Iona; Cheung Alex Li, Man; Matsubara, Yutaka; Matsuo, Taro; Miyazaki, Shota; Muraki, Yasushi; Nagakane, Masayuki; Ranc, Clement; Rattenbury, Nicholas J.; Suematsu, Haruno; Shibai, Hiroshi; Suzuki, Daisuke; Tristram, Paul J.; Yonehara, Atsunori; Skowron, J.; Poleski, R.; Mroz, P.; Szymanski, M.K.; Soszynski, I.; Kozlowski, S.; Pietrukowicz, P.; Ulaczyk, K.; Rybicki, K.; Iwanek, P.; Albrow, Michael D.; Chung, Sun-Ju; Gould, Andrew; Han, Cheongho; Hwang, Kyu-Ha; Kil Jung, Youn; Shin, In-Gu; Zang, Weicheng; Cha, Sang-Mok; Kim, Dong-Jin; Kim, Hyoun-Woo; Kim, Seung-Lee; Lee, Chung-Uk; Lee, Dong-Joo; Lee, Yongseok; Park, Byeong-Gon; Pogge, Richard W.; Beichman, Charles A.; Bryden, Geoffery; Calchi Novati, Sebastiano; Carey, Sean; Scot...
Authors
David P. Bennett
Yoon-Hyun Ryu
Naoki Koshimoto
Andrzej Udalski
Jennifer C. Yee
Takahiro Sumi
Ian A. Bond
Yossi Shvartzvald
Fumio Abe
Richard K. Barry
Aparna Bhattacharya
Martin Donachie
Akihiko Fukui
Yoshitaka Itow
Iona Kondo
Man Cheung Alex Li
Yutaka Matsubara
Taro Matsuo
Shota Miyazaki
Yasushi Muraki
Masayuki Nagakane
Clement Ranc
Nicholas J. Rattenbury
Haruno Suematsu
Hiroshi Shibai
Daisuke Suzuki
Paul J. Tristram
Atsunori Yonehara
J. Skowron
R. Poleski
P. Mroz
M.K. Szymanski
I. Soszynski
S. Kozlowski
P. Pietrukowicz
K. Ulaczyk
K. Rybicki
P. Iwanek
Michael D. Albrow
Sun-Ju Chung
Andrew Gould
Cheongho Han
Kyu-Ha Hwang
Youn Kil Jung
In-Gu Shin
Weicheng Zang
Sang-Mok Cha
Dong-Jin Kim
Hyoun-Woo Kim
Seung-Lee Kim
Chung-Uk Lee
Dong-Joo Lee
Yongseok Lee
Byeong-Gon Park
Richard W. Pogge
Charles A. Beichman
Geoffery Bryden
Sebastiano Calchi Novati
Sean Carey
B. Scott Gaudi
Calen B. Henderson
Wei Zhu
Etienne Bachelet
Greg Bolt
Grant Christie
Markus Hundertmark
Tim Natusch
Dan Maoz
Jennie McCormick
Rachel A. Street
Thiam-Guan Tan
Yiannis Tsapras
U.G. Jorgensen
M. Dominik
V. Bozza
J. Skottfelt
C. Snodgrass
S. Ciceri
R. Figuera Jaimes
D.F. Evans
N. Peixinho
T.C. Hinse
M.J. Burgdorf
Dr John Taylor j.k.taylor@keele.ac.uk
S. Rahvar
S. Sajadian
M. Rabus
C. von Essen
Y.I. Fujii
J. Campbell-White
S. Lowry
C. Helling
L. Mancini
L. Haikala
Ryo Kandori
Abstract
We report the discovery and analysis of the planetary microlensing event OGLE-2017-BLG-0406, which was observed both from the ground and by the Spitzer satellite in a solar orbit. At high magnification, the anomaly in the light curve was densely observed by ground-based-survey and follow-up groups, and it was found to be explained by a planetary lens with a planet/host mass ratio of $q=7.0\times {10}^{-4}$ from the light-curve modeling. The ground-only and Spitzer-"only" data each provide very strong one-dimensional (1D) constraints on the 2D microlens parallax vector ${{\boldsymbol{\pi }}}_{{\rm{E}}}$. When combined, these yield a precise measurement of ${{\boldsymbol{\pi }}}_{{\rm{E}}}$ and of the masses of the host ${M}_{\mathrm{host}}=0.56\pm 0.07\,{M}_{\odot }$ and planet M planet = 0.41 ± 0.05 M Jup. The system lies at a distance D L = 5.2 ± 0.5 kpc from the Sun toward the Galactic bulge, and the host is more likely to be a disk population star according to the kinematics of the lens. The projected separation of the planet from the host is ${a}_{\perp }=3.5\pm 0.3\,\mathrm{au}$ (i.e., just over twice the snow line). The Galactic-disk kinematics are established in part from a precise measurement of the source proper motion based on OGLE-IV data. By contrast, the Gaia proper-motion measurement of the source suffers from a catastrophic 10s error.
Journal Article Type | Article |
---|---|
Acceptance Date | Jun 6, 2020 |
Online Publication Date | Jul 23, 2020 |
Publication Date | Aug 1, 2020 |
Publicly Available Date | May 26, 2023 |
Journal | Astronomical Journal |
Print ISSN | 0004-6256 |
Publisher | American Astronomical Society |
Peer Reviewed | Peer Reviewed |
Volume | 160 |
Issue | 2 |
Article Number | 74 |
DOI | https://doi.org/10.3847/1538-3881/ab9ac3 |
Keywords | Gravitational microlensing, Gravitational microlensing, exoplanet detection |
Publisher URL | https://doi.org/10.3847/1538-3881/ab9ac3 |
Files
2020AJ....160...74H.pdf
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