Artykuł w czasopiśmie
Brak miniatury
Licencja
 

WFIRST Exoplanet Mass-measurement Method Finds a Planetary Mass of 39±8M⊕ for OGLE-2012-BLG-0950Lb

Uproszczony widok
dc.abstract.enWe present the analysis of the simultaneous high-resolution images from the Hubble Space Telescope and Keck adaptive optics system of the planetary event OGLE-2012-BLG-0950 that determine that the system consists of a 0.58 ± 0.04 {M}<SUB>⊙ </SUB> host star orbited by a 39 ± 8 {M}<SUB>\oplus </SUB> planet at a projected separation of 2.54 ± 0.23 au. The planetary system is located at a distance of 2.19 ± 0.23 kpc from Earth. This is the second microlens planet beyond the snow line with a mass measured to be in the mass range 20-80 {M}<SUB>\oplus </SUB>. The runaway gas accretion process of the core accretion model predicts fewer planets in this mass range. This is because giant planets are thought to be growing rapidly at these masses, and they rarely complete growth at this mass. So this result suggests that the core accretion theory may need revision. This analysis also demonstrates the techniques that will be used to measure the masses of planets and their host stars by the WFIRST exoplanet microlensing survey: one-dimensional microlensing parallax combined with the separation and brightness measurement of the unresolved source and host stars to yield multiple redundant constraints on the masses and distance of the planetary system.
dc.affiliationUniwersytet Warszawski
dc.contributor.authorBhattacharya, A.
dc.contributor.authorBeaulieu, J. -P.
dc.contributor.authorBennett, D. P.
dc.contributor.authorAnderson, J.
dc.contributor.authorKoshimoto, N.
dc.contributor.authorLu, J. R.
dc.contributor.authorBatista, V.
dc.contributor.authorBlackman, J. W.
dc.contributor.authorBond, I. A.
dc.contributor.authorFukui, A.
dc.contributor.authorHenderson, C. B.
dc.contributor.authorHirao, Y.
dc.contributor.authorMarquette, J. B.
dc.contributor.authorMróz, Przemysław
dc.contributor.authorRanc, C.
dc.contributor.authorUdalski, Andrzej
dc.date.accessioned2024-01-26T11:56:50Z
dc.date.available2024-01-26T11:56:50Z
dc.date.copyright2018-09-07
dc.date.issued2018
dc.description.accesstimeBEFORE_PUBLICATION
dc.description.financeNie dotyczy
dc.description.number6
dc.description.versionORIGINAL_AUTHOR
dc.description.volume156
dc.identifier.doi10.3847/1538-3881/AAED46
dc.identifier.issn0004-6256
dc.identifier.urihttps://repozytorium.uw.edu.pl//handle/item/124890
dc.identifier.weblinkhttp://adsabs.harvard.edu/abs/2018AJ....156..289B
dc.languageeng
dc.pbn.affiliationastronomy
dc.relation.ispartofAstronomical Journal
dc.relation.pages289
dc.rightsOther
dc.sciencecloudnosend
dc.titleWFIRST Exoplanet Mass-measurement Method Finds a Planetary Mass of 39±8M⊕ for OGLE-2012-BLG-0950Lb
dc.typeJournalArticle
dspace.entity.typePublication