On Planetary Companions to the MACHO-98-BLG-35 Microlens Star

  title={On Planetary Companions to the MACHO-98-BLG-35 Microlens Star},
  author={S.H.Rhie and D.P.Bennett and A.C.Becker and B.A.Peterson and P.C.Fragile and B.R.Johnson and J.L.Quinn and A.Crouch and J.Gray and L.King and B.Messenger and S.Thomson and I.A.Bond and F.Abe and B.S.Carter and R.J.Dodd and J.B.Hearnshaw and M.Honda and J.Jugaku and S.Kabe and P.M.Kilmartin and B.S.Koribalski and K.Masuda and Y.Matsubara and Y.Muraki and T.Nakamura and G.R.Nankivell and S.Noda and N.J.Rattenbury and M.Reid and N.J.Rumsey and To.Saito and H.Sato and S.Sato and M.Sekiguchi and D.J.Sullivan and T.Sumi and Y.Watase and T.Yanagisawa and P.C.M.Yock and M.Yoshizawa},
We present observations of microlensing event MACHO-98-BLG-35 which reached a peak magnification factor of almost 80. These observations by the Microlensing Planet Search (MPS) and the MOA Collaborations place strong constraints on the possible planetary system of the lens star and show intriguing evidence for a low mass planet with a mass fraction $4\times 10^{-5} \leq \epsilon \leq 2\times 10^{-4}$. A giant planet with $\epsilon = 10^{-3}$ is excluded from 95% of the region between 0.4 and 2… Expand
A Likely Detection of a Two-planet System in a Low-magnification Microlensing Event
We report on the analysis of a microlensing event OGLE-2014-BLG-1722 that showed two distinct short term anomalies. The best fit model to the observed light curves shows that the two anomalies areExpand
Detection of Extrasolar Planets by Gravitational Microlensing
Gravitational microlensing provides a unique window on the properties and prevalence of extrasolar planetary systems because of its ability to find low-mass planets at separations of a few AU. TheExpand
Kojima-1Lb Is a Mildly Cold Neptune around the Brightest Microlensing Host Star
We report the analysis of additional multiband photometry and spectroscopy and new adaptive optics (AO) imaging of the nearby planetary microlensing event TCP J05074264+2447555 (Kojima-1), which wasExpand
OGLE-2014-BLG-1186: gravitational microlensing providing evidence for a planet orbiting the foreground star or for a close binary source?
Discussing the particularly long gravitational microlensing event OGLE-2014-BLG-1186 with a time-scale t_E ∼ 300 d, we present a methodology for identifying the nature of localised deviations fromExpand
On the topology of microlensing events of Earth-Sun fraction mass systems
In this work, we analyze the topology of microlensing events that generate light curves in which it would be possible to detect Earth-mass planets around Solar-mass stars. We used the semi-analyticalExpand
The exoplanet microlensing survey by the proposed WFIRST Observatory
The New Worlds, New Horizons report released by the Astronomy and Astrophysics Decadal Survey Board in 2010 listed the Wide Field Infrared Survey Telescope (WFIRST) as the highest-priority largeExpand
Wide-Field InfraRed Survey Telescope WFIRST
In December 2010, NASA created a Science Definition Team (SDT) for WFIRST, the Wide Field Infra-Red Survey Telescope, recommended by the Astro 2010 Decadal Survey as the highest priority for a largeExpand
OGLE-2016-BLG-1045: A Test of Cheap Space-based Microlens Parallaxes
Microlensing is a powerful and unique technique to probe isolated objects in the Galaxy. To study the characteristics of these interesting objects based on the microlensing method, measurement of theExpand
The Exoplanet Handbook
1. Introduction 2. Radial velocities 3. Astrometry 4. Timing 5. Microlensing 6. Transits 7. Imaging 8. Host stars 9. Brown dwarfs and free-floating planets 10. Formation and evolution 11. InteriorsExpand
An Earth-mass planet in a time of COVID-19: KMT-2020-BLG-0414Lb
We report the discovery of KMT-2020-BLG-0414Lb, with a planet-to-host mass ratio q 2 = 0.9–1.2 × 10−5 = 3–4 ⊕ at 1σ, which is the lowest mass-ratio microlensing planet to date. Together with twoExpand