OGLE-2017-BLG-0482Lb: A Microlensing Super-Earth Orbiting a Low-mass Host Star

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dc.contributor.authorHan C
dc.contributor.authorHirao Y
dc.contributor.authorUdalski A
dc.contributor.authorLee CU
dc.contributor.authorBozza V
dc.contributor.authorGould A
dc.contributor.authorAbe F
dc.contributor.authorBarry R
dc.contributor.authorBond IA
dc.contributor.authorBennett DP
dc.contributor.authorBhattacharya A
dc.contributor.authorDonachie M
dc.contributor.authorEvans P
dc.contributor.authorFukui A
dc.contributor.authorItow Y
dc.contributor.authorKawasaki K
dc.contributor.authorKoshimoto N
dc.contributor.authorLi MCA
dc.contributor.authorLing CH
dc.contributor.authorMatsubara Y
dc.contributor.authorMiyazaki S
dc.contributor.authorMunakata H
dc.contributor.authorMuraki Y
dc.contributor.authorNagakane M
dc.contributor.authorOhnishi K
dc.contributor.authorRanc C
dc.contributor.authorRattenbury N
dc.contributor.authorSaito T
dc.contributor.authorSharan A
dc.contributor.authorSullivan DJ
dc.contributor.authorSumi T
dc.contributor.authorSuzuki D
dc.contributor.authorTristram PJ
dc.contributor.authorYamada T
dc.contributor.authorYonehara A
dc.contributor.authorMróz P
dc.contributor.authorPoleski R
dc.contributor.authorKozłowski S
dc.contributor.authorSoszyński I
dc.contributor.authorPietrukowicz P
dc.contributor.authorSkowron J
dc.contributor.authorSzymański MK
dc.contributor.authorUlaczyk K
dc.contributor.authorPawlak M
dc.contributor.authorRybicki K
dc.contributor.authorIwanek P
dc.contributor.authorAlbrow MD
dc.contributor.authorChung SJ
dc.contributor.authorHwang KH
dc.contributor.authorJung YK
dc.contributor.authorKim D
dc.contributor.authorKim WT
dc.contributor.authorKim HW
dc.contributor.authorRyu YH
dc.contributor.authorShin IG
dc.contributor.authorShvartzvald Y
dc.contributor.authorYee JC
dc.contributor.authorZhu W
dc.contributor.authorCha SM
dc.contributor.authorKim SL
dc.contributor.authorKim DJ
dc.contributor.authorLee DJ
dc.contributor.authorLee Y
dc.contributor.authorPark BG
dc.contributor.authorPogge RW
dc.date.accessioned2018-11-18T21:48:35Z
dc.date.available2018-11-18T21:48:35Z
dc.date.issued2018en
dc.date.updated2018-10-31T19:48:39Z
dc.description.abstract© 2018. The American Astronomical Society. All rights reserved. We report the discovery of a planetary system in which a super-Earth orbits a late M-dwarf host. The planetary system was found from the analysis of the microlensing event OGLE-2017-BLG-0482, wherein the planet signal appears as a short-term anomaly to the smooth lensing light curve produced by the host. Despite its weak signal and short duration, the planetary signal was firmly detected from the dense and continuous coverage by three microlensing surveys. We find a planet/host mass ratio of q ∼ 1.4 × 10-4. We measure the microlens parallax from the long-term deviation in the observed lensing light curve, but the angular Einstein radius cannot be measured because the source trajectory did not cross the planet-induced caustic. Using the measured event timescale and the microlens parallax, we find that the masses of the planet and the host are and , respectively, and the projected separation between them is au. The estimated distance to the lens is kpc. The discovery of the planetary system demonstrates that microlensing provides an important method to detect low-mass planets orbiting low-mass stars.en
dc.identifier.doihttps://doi.org/10.3847/1538-3881/aabad2
dc.identifier.issn0004-6256
dc.identifier.issn1538-3881
dc.identifier.urihttp://hdl.handle.net/10092/16222
dc.language.isoen
dc.subjectgravitational lensing: microen
dc.subjectplanetary systemsen
dc.subject.anzsrcFields of Research::51 - Physical sciences::5101 - Astronomical sciences::510109 - Stellar astronomy and planetary systemsen
dc.titleOGLE-2017-BLG-0482Lb: A Microlensing Super-Earth Orbiting a Low-mass Host Staren
dc.typeJournal Articleen
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