Artykuł w czasopiśmie
Brak miniatury
Licencja
 

OGLE-2018-BLG-1185b: A Low-mass Microlensing Planet Orbiting a Low-mass Dwarf

Uproszczony widok
cris.lastimport.scopus2024-02-12T19:29:11Z
dc.abstract.enWe 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<SUP>-5</SUP>, 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<SUB>Spz</SUB> < 4 instrumental flux units yields a host mass of <?CDATA ${M}_{\mathrm{host}}={0.37}_{-0.21}^{+0.35}\ {M}_{\odot }$?> and a planet mass of <?CDATA ${m}_{{\rm{p}}}={8.4}_{-4.7}^{+7.9}\ {M}_{\oplus }$?> . A Bayesian analysis including the full parallax constraint from Spitzer suggests smaller host star and planet masses of <?CDATA ${M}_{\mathrm{host}}={0.091}_{-0.018}^{+0.064}\ {M}_{\odot }$?> and <?CDATA ${m}_{{\rm{p}}}={2.1}_{-0.4}^{+1.5}\ {M}_{\oplus }$?> , 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.
dc.affiliationUniwersytet Warszawski
dc.contributor.authorUdalski, Andrzej
dc.contributor.authorPoleski, Radosław
dc.contributor.authorSkowron, Jan
dc.contributor.authorSzymański, Michał
dc.contributor.authorSoszyński, Igor
dc.contributor.authorKozłowski, Szymon
dc.contributor.authorPietrukowicz, Paweł
dc.contributor.authorKondo, Iona
dc.contributor.authorYee, Jennifer C.
dc.contributor.authorBennett, David P.
dc.contributor.authorSumi, Takahiro
dc.contributor.authorKoshimoto, Naoki
dc.contributor.authorBond, Ian A.
dc.contributor.authorGould, Andrew
dc.contributor.authorShvartzvald, Yossi
dc.contributor.authorJung, Youn Kil
dc.contributor.authorZang, Weicheng
dc.contributor.authorBozza, Valerio
dc.contributor.authorBachelet, Etienne
dc.contributor.authorHundertmark, Markus P. G.
dc.contributor.authorRattenbury, Nicholas J.
dc.contributor.authorAbe, F.
dc.contributor.authorBarry, R.
dc.contributor.authorBhattacharya, A.
dc.contributor.authorDonachie, M.
dc.contributor.authorFukui, A.
dc.contributor.authorFujii, H.
dc.contributor.authorHirao, Y.
dc.contributor.authorSilva, S. Ishitani
dc.contributor.authorItow, Y.
dc.contributor.authorKirikawa, R.
dc.contributor.authorLi, M. C. A.
dc.contributor.authorMatsubara, Y.
dc.contributor.authorMiyazaki, S.
dc.contributor.authorMuraki, Y.
dc.contributor.authorOlmschenk, G.
dc.contributor.authorRanc, C.
dc.contributor.authorSatoh, Y.
dc.contributor.authorShoji, H.
dc.contributor.authorSuzuki, D.
dc.contributor.authorTanaka, Y.
dc.contributor.authorTristram, P. J.
dc.contributor.authorYamawaki, T.
dc.contributor.authorYonehara, A.
dc.contributor.authorMróz, Przemysław
dc.contributor.authorUlaczyk, Krzysztof
dc.contributor.authorRybicki, Krzysztof
dc.contributor.authorIwanek, Patryk
dc.contributor.authorWrona, Marcin
dc.contributor.authorAlbrow, M. D.
dc.contributor.authorChung, S. -J.
dc.contributor.authorHan, C.
dc.contributor.authorHwang, K. -H.
dc.contributor.authorKim, H. -W.
dc.contributor.authorShin, I. -G.
dc.contributor.authorCha, S. -M.
dc.contributor.authorKim, D. -J.
dc.contributor.authorKim, S. -L.
dc.contributor.authorLee, C. -U.
dc.contributor.authorLee, D. -J.
dc.contributor.authorLee, Y.
dc.contributor.authorPark, B. -G.
dc.contributor.authorPogge, R. W.
dc.contributor.authorRyu, Y. -H.
dc.contributor.authorBeichman, C. A.
dc.contributor.authorBryden, G.
dc.contributor.authorNovati, S. Calchi
dc.contributor.authorCarey, S.
dc.contributor.authorGaudi, B. S.
dc.contributor.authorHenderson, C. B.
dc.contributor.authorZhu, W.
dc.contributor.authorMaoz, D.
dc.contributor.authorPenny, M. T.
dc.contributor.authorDominik, M.
dc.contributor.authorJørgensen, U. G.
dc.contributor.authorLonga-Peña, P.
dc.contributor.authorPeixinho, N.
dc.contributor.authorSajadian, S.
dc.contributor.authorSkottfelt, J.
dc.contributor.authorSnodgrass, C.
dc.contributor.authorTregloan-Reed, J.
dc.contributor.authorBurgdorf, M. J.
dc.contributor.authorCampbell-White, J.
dc.contributor.authorDib, S.
dc.contributor.authorFujii, Y. I.
dc.contributor.authorHinse, T. C.
dc.contributor.authorKhalouei, E.
dc.contributor.authorRahvar, S.
dc.contributor.authorRabus, M.
dc.contributor.authorSouthworth, J.
dc.contributor.authorTsapras, Y.
dc.contributor.authorStreet, R. A.
dc.contributor.authorBramich, D. M.
dc.contributor.authorCassan, A.
dc.contributor.authorHorne, K.
dc.contributor.authorWambsganss, J.
dc.contributor.authorMao, S.
dc.contributor.authorSaha, A.
dc.date.accessioned2024-01-25T15:42:43Z
dc.date.available2024-01-25T15:42:43Z
dc.date.copyright2021-05-12
dc.date.issued2021
dc.description.accesstimeBEFORE_PUBLICATION
dc.description.financePublikacja bezkosztowa
dc.description.number2
dc.description.versionORIGINAL_AUTHOR
dc.description.volume162
dc.identifier.doi10.3847/1538-3881/AC00BA
dc.identifier.issn0004-6256
dc.identifier.urihttps://repozytorium.uw.edu.pl//handle/item/114528
dc.identifier.weblinkhttp://adsabs.harvard.edu/abs/2021AJ....162...77K
dc.languageeng
dc.pbn.affiliationastronomy
dc.relation.ispartofAstronomical Journal
dc.relation.pages77
dc.rightsOther
dc.sciencecloudnosend
dc.titleOGLE-2018-BLG-1185b: A Low-mass Microlensing Planet Orbiting a Low-mass Dwarf
dc.typeJournalArticle
dspace.entity.typePublication