Spitzer Parallax of OGLE-2018-BLG-0596: A Low-mass-ratio Planet around an M Dwarf
Jung,Youn Kil1; Gould,Andrew1,2,3; Udalski,Andrzej4; Sumi,Takahiro5; Yee,Jennifer C.6; Shvartzvald,Yossi7; Zang,Weicheng8; Han,Cheongho9; Albrow,Michael D.10; Chung,Sun-Ju1,11; Hwang,Kyu-Ha1; Ryu,Yoon-Hyun1; Shin,In-Gu1; Zhu,Wei12; Cha,Sang-Mok1,13; Kim,Dong-Jin1; Kim,Hyoun-Woo1; Kim,Seung-Lee1,11; Lee,Chung-Uk1,11; Lee,Dong-Joo1; Lee,Yongseok1,13; Park,Byeong-Gon1,11; Pogge,Richard W.2; Mróz,Przemek4; Szymański,Micha? K.4; Skowron,Jan4; Poleski,Radek2; Soszyński,Igor4; Pietrukowicz,Pawe?4; Koz?owski,Szymon4; Ulaczyk,Krzystof14; Rybicki,Krzysztof A.4; Iwanek,Patryk4; Wrona,Marcin4; Beichman,Charles A.15; Bryden,Geoffery16; Novati,Sebastiano Calchi7; Carey,Sean17; Gaudi,B. Scott2; Henderson,Calen B.7; Abe,Fumio18; Barry,Richard19; Bennett,David P.19,20; Bond,Ian A.21; Bhattacharya,Aparna19,20; Donachie,Martin22; Fukui,Akihiko23,24; Hirao,Yuki5; Itow,Yoshitaka18; Kondo,Iona5; Koshimoto,Naoki25,26; Li,Man Cheung Alex22; Matsubara,Yutaka18; Miyazaki,Shota5; Muraki,Yasushi18; Nagakane,Masayuki5; Ranc,Clément19; Rattenbury,Nicholas J.22; Suematsu,Haruno5; Sullivan,Denis J.27; Suzuki,Daisuke28; Tristram,Paul J.29; Yonehara,Atsunori30; Jacklin,Savannah31; Penny,Matthew T.2; Stassun,Keivan G.31; Fouqué,Pascal32,33; Mao,Shude8,34; Wang,Tianshu8
Source PublicationThe Astronomical Journal
AbstractAbstract We report the discovery of a Spitzer microlensing planet OGLE-2018-BLG-0596Lb, with preferred planet-host mass ratio q?~?2?×?10?4. The planetary signal, which is characterized by a short (~1 day) “bump” on the rising side of the lensing light curve, was densely covered by ground-based surveys. We find that the signal can be explained by a bright source that fully envelops the planetary caustic, i.e., a “Hollywood” geometry. Combined with the source proper motion measured from Gaia, the Spitzer satellite parallax measurement makes it possible to precisely constrain the lens physical parameters. The preferred solution, in which the planet perturbs the minor image due to lensing by the host, yields a Uranus-mass planet with a mass of Mp?=?13.9?±?1.6?M⊕ orbiting a mid M-dwarf with a mass of Mh?=?0.23?±?0.03?M⊙. There is also a second possible solution that is substantially disfavored but cannot be ruled out, for which the planet perturbs the major image. The latter solution yields Mp?=?1.2?±?0.2?M⊕ and Mh?=?0.15?±?0.02?M⊙. By combining the microlensing and Gaia data together with a Galactic model, we find in either case that the lens lies on the near side of the Galactic bulge at a distance DL?~?6?±?1 kpc. Future adaptive optics observations may decisively resolve the major image/minor image degeneracy.
Keywordgravitational lensing: micro planetary systems
WOS IDIOP:0004-6256-158-1-ab237f
PublisherThe American Astronomical Society
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Document Type期刊论文
Affiliation1.Korea Astronomy and Space Science Institute, Daejon 34055, Republic of Korea
2.Department of Astronomy, Ohio State University, 140 W. 18th Ave., Columbus, OH 43210, USA
3.Max-Planck-Institute for Astronomy, K?nigstuhl 17, D-69117 Heidelberg, Germany
4.Warsaw University Observatory, Al. Ujazdowskie 4, 00-478 Warszawa, Poland
5.Department of Earth and Space Science, Graduate School of Science, Osaka University, Toyonaka, Osaka 560-0043, Japan
6.Center for Astrophysics ∣ Harvard & Smithsonian, 60 Garden Street, Cambridge, MA 02138, USA
7.IPAC, Mail Code 100-22, Caltech, 1200 E. California Boulevard, Pasadena, CA 91125, USA
8.Physics Department and Tsinghua Centre for Astrophysics, Tsinghua University, Beijing 100084, People’s Republic of China
9.Department of Physics, Chungbuk National University, Cheongju 28644, Republic of Korea
10.University of Canterbury, Department of Physics and Astronomy, Private Bag 4800, Christchurch 8020, New Zealand
11.University of Science and Technology, Korea, 217 Gajeong-ro Yuseong-gu, Daejeon 34113, Republic of Korea
12.Canadian Institute for Theoretical Astrophysics, University of Toronto, 60 St. George Street, Toronto, ON M5S 3H8, Canada
13.School of Space Research, Kyung Hee University, Yongin 17104, Republic of Korea
14.Department of Physics, University of Warwick, Gibbet Hill Road, Coventry, CV4 7AL, UK
15.NASA Exoplanet Science Institute, MS 100-22, California Institute of Technology, Pasadena, CA 91125, USA
16.Jet Propulsion Laboratory, California Institute of Technology, 4800, Oak Grove Dr., Pasadena, CA 91109, USA
17.Spitzer Science Center, MS 220-6, California Institute of Technology, Pasadena, CA, USA
18.Institute for Space-Earth Environmental Research, Nagoya University, Nagoya 464-8601, Japan
19.Code 667, NASA Goddard Space Flight Center, Greenbelt, MD 20771, USA
20.Department of Astronomy, University of Maryland, College Park, MD 20742, USA
21.Institute of Natural and Mathematical Science, Massey University, Auckland 0745, New Zealand
22.Department of Physics, University of Auckland, Private Bag 92019, Auckland, New Zealand
23.Department of Earth and Planetary Science, Graduate School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
24.Instituto de Astrofísica de Canarias, Vía Láctea s/n, E-38205 La Laguna, Tenerife, Spain
25.Department of Astronomy, Graduate School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
26.National Astronomical Observatory of Japan, 2-21-1 Osawa, Mitaka, Tokyo 181-8588, Japan
27.School of Chemical and Physical Science, Victoria University, Wellington, New Zealand
28.Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency, Kanagawa 252-5210, Japan
29.University of Canterbury Mt. John Observatory, P.O. Box 56, Lake Tekapo 8770, New Zealand
30.Department of Physics, Faculty of Science, Kyoto Sangyo University, Kyoto 603-8555, Japan
31.Vanderbilt University, Department of Physics & Astronomy, PMB 401807, 2301 Vanderbilt Place, Nashville, TN 37235, USA
32.CFHT Corporation, 65-1238 Mamalahoa Highway, Kamuela, HI 96743, USA
33.Université de Toulouse, UPS-OMP, IRAP, Toulouse, France
34.National Astronomical Observatories, Chinese Academy of Sciences, A20 Datun Road, Chaoyang District, Beijing 100012, People’s Republic of China
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GB/T 7714
Jung,Youn Kil,Gould,Andrew,Udalski,Andrzej,et al. Spitzer Parallax of OGLE-2018-BLG-0596: A Low-mass-ratio Planet around an M Dwarf[J]. The Astronomical Journal,2019,158(1).
APA Jung,Youn Kil.,Gould,Andrew.,Udalski,Andrzej.,Sumi,Takahiro.,Yee,Jennifer C..,...&Wang,Tianshu.(2019).Spitzer Parallax of OGLE-2018-BLG-0596: A Low-mass-ratio Planet around an M Dwarf.The Astronomical Journal,158(1).
MLA Jung,Youn Kil,et al."Spitzer Parallax of OGLE-2018-BLG-0596: A Low-mass-ratio Planet around an M Dwarf".The Astronomical Journal 158.1(2019).
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