We constrain the host-star flux of the microlensing planet OGLE-2014-BLG-0676 Lb using adaptive optics(AO)images taken by the Magellan and Keck telescopes.We measure the flux of the light blended with the microlensed ...We constrain the host-star flux of the microlensing planet OGLE-2014-BLG-0676 Lb using adaptive optics(AO)images taken by the Magellan and Keck telescopes.We measure the flux of the light blended with the microlensed source to be K=16.79±0.04 mag and J=17.76±0.03 mag.Assuming that the blend is the lens star,we find that the host is a 0.73_(-0.29)^(+0.14)M_(⊙)star at a distance of2.67_(-1.41)^(+0.77)kpc,where the relatively large uncertainty in angular Einstein radius measurement is the major source of uncertainty.With mass of M_(p)=3.68_(-1.44)^(+0.69)M_J,the planet is likely a"super Jupiter"at a projected separation of r_(⊥)=4.53_(-2.50)^(+1.49)AU,and a degenerate model yields a similar M_p=3.73_(-1.47)^(+0.73)M_(J)at a closer separation of r_(⊥)=2.56_(-1.41)^(+0.84)AU.Our estimates are consistent with the previous Bayesian analysis based on a Galactic model.OGLE-2014-BLG-0676 Lb belongs to a sample of planets discovered in a"secondgeneration"planetary microlensing survey and we attempt to systematically constrain host properties of this sample with high-resolution imaging to study the distribution of planets.展开更多
The Large Sky Area Multi-Object Fiber Spectroscopic Telescope(LAMOST),also known as the Guoshoujing Telescope,is a major national scientific facility for astronomical research located in Xinglong,China.Beginning with ...The Large Sky Area Multi-Object Fiber Spectroscopic Telescope(LAMOST),also known as the Guoshoujing Telescope,is a major national scientific facility for astronomical research located in Xinglong,China.Beginning with a pilot survey in 2011,LAMOST has been surveying the night sky for more than 10 years.The LAMOST survey covers various objects in the Universe,from normal stars to peculiar ones.展开更多
基金the support by National Key R&D Program of China(No.2019YFA0405100)the China Manned Space Project with NO.CMS-CSST-2021-A11 and+6 种基金Project 11573003 supported by the National Natural Science Foundation of China(NSFC)supported by a NASA Keck PI Data Awardpossible by the generous financial support of the W.M.Keck Foundationfunding from the National Science Centre,Poland,grant MAESTRO 2014/14/A/ST9/00121 to AUthe financial support of the ANR COLD WORLDS(ANR-18-CE31-0002)supported by the NASA Exoplanets Research Program(XRP)by cooperative agreement NNX16AD44Gsupported by the University of Tasmania through the UTAS Foundation and the endowed Warren Chair in Astronomy。
文摘We constrain the host-star flux of the microlensing planet OGLE-2014-BLG-0676 Lb using adaptive optics(AO)images taken by the Magellan and Keck telescopes.We measure the flux of the light blended with the microlensed source to be K=16.79±0.04 mag and J=17.76±0.03 mag.Assuming that the blend is the lens star,we find that the host is a 0.73_(-0.29)^(+0.14)M_(⊙)star at a distance of2.67_(-1.41)^(+0.77)kpc,where the relatively large uncertainty in angular Einstein radius measurement is the major source of uncertainty.With mass of M_(p)=3.68_(-1.44)^(+0.69)M_J,the planet is likely a"super Jupiter"at a projected separation of r_(⊥)=4.53_(-2.50)^(+1.49)AU,and a degenerate model yields a similar M_p=3.73_(-1.47)^(+0.73)M_(J)at a closer separation of r_(⊥)=2.56_(-1.41)^(+0.84)AU.Our estimates are consistent with the previous Bayesian analysis based on a Galactic model.OGLE-2014-BLG-0676 Lb belongs to a sample of planets discovered in a"secondgeneration"planetary microlensing survey and we attempt to systematically constrain host properties of this sample with high-resolution imaging to study the distribution of planets.
基金This work is supported by the the National Natural Science Foundation of China under grant nos.11988101,11973049,11933004,11890694,12090040,12090042,12090043,12090044,11833002,11833006,12022304,11835057,11973052,11633005,12173007,11933001,11703035,U2031203,and U1531244the National Key R&D Program of China under grant nos.2019YFA0405100,2019YFA0405500,2019YFA0405502,2019YFA0405503,2019YFA0405504,2016YFA0400804,and 2019YFA0405000+1 种基金the Strategic Priority Research Program of the Chinese Academy of Sciences,grant nos.XDB34020205 and XDB41000000H.Yan,H.L.,S.W.,and Hailong Yuan acknowledge support from the Youth Innovation Promotion Association of the Chinese Academy of Sciences(nos.2019060,Y202017,2019057,and 2020060,respectively).
文摘The Large Sky Area Multi-Object Fiber Spectroscopic Telescope(LAMOST),also known as the Guoshoujing Telescope,is a major national scientific facility for astronomical research located in Xinglong,China.Beginning with a pilot survey in 2011,LAMOST has been surveying the night sky for more than 10 years.The LAMOST survey covers various objects in the Universe,from normal stars to peculiar ones.
