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 Online-Ressource | |
| Verfasst von: | Kondo, Iona [VerfasserIn]  |
| Hundertmark, Markus [VerfasserIn] | |
| Titel: | OGLE-2018-BLG-1185b |
| Titelzusatz: | a low-mass microlensing planet orbiting a low-mass dwarf |
| Verf.angabe: | Iona Kondo, Jennifer C. Yee, David P. Bennett, Takahiro Sumi, Naoki Koshimoto, Ian A. Bond, Andrew Gould, Andrzej Udalski, Yossi Shvartzvald, Youn Kil Jung, Weicheng Zang, Valerio Bozza, Etienne Bachelet, Markus P.G. Hundertmark, Nicholas J. Rattenbury, (Leading Authors), F. Abe, R. Barry, A. Bhattacharya, M. Donachie, A. Fukui, H. Fujii, Y. Hirao, S. Ishitani Silva, Y. Itow, R. Kirikawa, M.C.A. Li, Y. Matsubara, S. Miyazaki, Y. Muraki, G. Olmschenk, C. Ranc, Y. Satoh, H. Shoji, D. Suzuki, Y. Tanaka, P.J. Tristram, T. Yamawaki, A. Yonehara, ( The MOA Collaboration), P. Mróz, R. Poleski, J. Skowron, M.K. Szymański, I. Soszyński, S. Koz\lowski, P. Pietrukowicz, K. Ulaczyk, K.A. Rybicki, P. Iwanek, M. Wrona, (The OGLE Collaboration), M.D. Albrow, S.-J. Chung, C. Han, K.-H. Hwang, H.-W. Kim, I.-G. Shin, S.-M. Cha, D.-J. Kim, S.-L. Kim, C.-U. Lee, D.-J. Lee, Y. Lee, B.-G. Park, R.W. Pogge, Y.-H. Ryu, (The KMTNet Collaboration), C.A. Beichman, G. Bryden, S. Calchi Novati, S. Carey, B.S. Gaudi, C.B. Henderson, W. Zhu, (The Spitzer Team), D. Maoz, M.T. Penny, (The LCO Follow-up Team), M. Dominik, U.G. Jørgensen, P. Longa-Peña, N. Peixinho, S. Sajadian, J. Skottfelt, C. Snodgrass, J. Tregloan-Reed, M.J. Burgdorf, J. Campbell-White, S. Dib, Y.I. Fujii, T.C. Hinse, E. Khalouei, S. Rahvar, M. Rabus, J. Southworth, (The MiNDSTEp Collaboration), Y. Tsapras, R.A. Street, D.M. Bramich, A. Cassan, K. Horne, J. Wambsganss, S. Mao, and A. Saha, (The ROME/REA Project Team) |
| E-Jahr: | 2021 |
| Jahr: | 2021 July 29 |
| Umfang: | 18 S. |
| Teil: | volume:162 |
| year:2021 | |
| number:2 | |
| elocationid:77 | |
| pages:1-18 | |
| extent:18 | |
| Fussnoten: | Gesehen am 23.09.2021 |
| Titel Quelle: | Enthalten in: The astronomical journal |
| Ort Quelle: | London : Institute of Physics Publ., 1998 |
| Jahr Quelle: | 2021 |
| Band/Heft Quelle: | 162(2021), 2, Artikel-ID 77, Seite 1-18 |
| ISSN Quelle: | 1538-3881 |
| Abstract: | We report an analysis of the planetary microlensing event OGLE-2018-BLG-1185, which was observed by a large number of ground-based telescopes and by the Spitzer Space Telescope. The ground-based light curve indicates a low planet-host star mass ratio of q = (6.9 ± 0.2) × 10−5, which is near the peak of the wide-orbit exoplanet mass-ratio distribution. We estimate the host star and planet masses with a Bayesian analysis using the measured angular Einstein radius under the assumption that stars of all masses have an equal probability of hosting the planet. The flux variation observed by Spitzer is marginal, but still places a constraint on the microlens parallax. Imposing a conservative constraint that this flux variation should be Δf Spz < 4 instrumental flux units yields a host mass of and a planet mass of . A Bayesian analysis including the full parallax constraint from Spitzer suggests smaller host star and planet masses of and , respectively. Future high-resolution imaging observations with the Hubble Space Telescope or Extremely Large Telescope could distinguish between these two scenarios and help reveal the planetary system properties in more detail. |
| DOI: | doi:10.3847/1538-3881/ac00ba |
| URL: | Bitte beachten Sie: Dies ist ein Bibliographieeintrag. Ein Volltextzugriff für Mitglieder der Universität besteht hier nur, falls für die entsprechende Zeitschrift/den entsprechenden Sammelband ein Abonnement besteht oder es sich um einen OpenAccess-Titel handelt. Volltext: https://doi.org/10.3847/1538-3881/ac00ba |
| DOI: https://doi.org/10.3847/1538-3881/ac00ba | |
| Datenträger: | Online-Ressource |
| Sprache: | eng |
| K10plus-PPN: | 1771724706 |
| Verknüpfungen: | → Zeitschrift |
