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OGLE-2017-BLG-0406: Spitzer microlens parallax reveals Saturn-mass planet orbiting M-dwarf host in the inner galactic disk

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Date
08/2020
Author
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
Li, Man Cheung Alex
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
Jung, Youn Kil
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
Gaudi, B. Scott
Henderson, Calen B.
Zhu, Wei
Bachelet, Etienne
Bolt, Greg
Christie, Grant
Hundertmark, Markus
Natusch, Tim
Maoz, Dan
McCormick, Jennie
Street, Rachel A.
Tan, Thiam-Guan
Tsapras, Yiannis
Jorgensen, U. G.
Dominik, M.
Bozza, V.
Skottfelt, J.
Snodgrass, C.
Ciceri, S.
Figuera Jaimes, R.
Evans, D. F.
Peixinho, N.
Hinse, T. C.
Burgdorf, M. J.
Southworth, J.
Rahvar, S.
Sajadian, S.
Rabus, M.
von Essen, C.
Fujii, Y. I.
Campbell-White, J.
Lowry, S.
Helling, C.
Mancini, L.
Haikala, L.
Kandori, Ryo
Keywords
Gravitational microlensing
Gravitational microlensing exoplanet detection
QB Astronomy
QC Physics
NDAS
Metadata
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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 x 10-4 from the light-curve modeling. The ground-only and Spitzer-"only" data each provide very strong one-dimensional (1-D) constraints on the 2-D microlens parallax vector πE. When combined, these yield a precise measurement of πE, and so of the masses of the host Mhost = 0.56 ± 0.07 M⊙ and planet Mplanet = 0.41 ± 0.05 MJup. The system lies at a distance DL = 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⊥ = 3.5 ± 0.3 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 10σ error.
Citation
Hirao , Y , Bennett , D P , Ryu , Y-H , Koshimoto , N , Udalski , A , Yee , J C , Sumi , T , Bond , I A , Shvartzvald , Y , Abe , F , Barry , R K , Bhattacharya , A , Donachie , M , Fukui , A , Itow , Y , Kondo , I , Li , M C A , Matsubara , Y , Matsuo , T , Miyazaki , S , Muraki , Y , Nagakane , M , Ranc , C , Rattenbury , N J , Suematsu , H , Shibai , H , Suzuki , D , Tristram , P J , Yonehara , A , Skowron , J , Poleski , R , Mroz , P , Szymanski , M K , Soszynski , I , Kozlowski , S , Pietrukowicz , P , Ulaczyk , K , Rybicki , K , Iwanek , P , Albrow , M D , Chung , S-J , Gould , A , Han , C , Hwang , K-H , Jung , Y K , Shin , I-G , Zang , W , Cha , S-M , Kim , D-J , Kim , H-W , Kim , S-L , Lee , C-U , Lee , D-J , Lee , Y , Park , B-G , Pogge , R W , Beichman , C A , Bryden , G , Calchi Novati , S , Carey , S , Gaudi , B S , Henderson , C B , Zhu , W , Bachelet , E , Bolt , G , Christie , G , Hundertmark , M , Natusch , T , Maoz , D , McCormick , J , Street , R A , Tan , T-G , Tsapras , Y , Jorgensen , U G , Dominik , M , Bozza , V , Skottfelt , J , Snodgrass , C , Ciceri , S , Figuera Jaimes , R , Evans , D F , Peixinho , N , Hinse , T C , Burgdorf , M J , Southworth , J , Rahvar , S , Sajadian , S , Rabus , M , von Essen , C , Fujii , Y I , Campbell-White , J , Lowry , S , Helling , C , Mancini , L , Haikala , L & Kandori , R 2020 , ' OGLE-2017-BLG-0406: Spitzer microlens parallax reveals Saturn-mass planet orbiting M-dwarf host in the inner galactic disk ' , Astronomical Journal , vol. 160 , no. 2 , 74 . https://doi.org/10.3847/1538-3881/ab9ac3
Publication
Astronomical Journal
Status
Peer reviewed
DOI
https://doi.org/10.3847/1538-3881/ab9ac3
ISSN
0004-6256
Type
Journal article
Rights
Copyright © 2020 American Astronomical Society. This work has been made available online in accordance with publisher policies or with permission. Permission for further reuse of this content should be sought from the publisher or the rights holder. This is the author created accepted manuscript following peer review and may differ slightly from the final published version. The final published version of this work is available at https://doi.org/10.3847/1538-3881/ab9ac3.
Description
Funding: Work by Y.H. was supported by JSPS KAKENHI Grant Number 17J02146. DPB, AB, and CR were supported by NASA through grant NASA-80NSSC18K0274. Work by N.K. is supported by JSPS KAKENHI Grant Number JP18J00897. Work by AG was supported by AST-1516842 from the US NSF and by JPL grant 1500811. AG received support from the European Research Council under the European Unions Seventh Framework Programme (FP 7) ERC Grant Agreement n.[321035]. Work by C.H. was supported by the grants of the National Research Foundation of Korea (2017R1A4A1015178 and 2019R1A2C2085965). YT acknowledges the support of DFG priority program SPP 1992 ”Exploring the Diversity of Extrasolar Planets” (WA 1047/11-1).
Collections
  • University of St Andrews Research
URL
http://adsabs.harvard.edu/abs/2020arXiv200409067H
URI
http://hdl.handle.net/10023/20096

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