# MOA-2011-BLG-262Lb: A Sub-Earth-Mass Moon Orbiting a Gas Giant Primary or a High Velocity Planetary System in the Galactic Bulge

@article{Bennett2014MOA2011BLG262LbAS,
title={MOA-2011-BLG-262Lb: A Sub-Earth-Mass Moon Orbiting a Gas Giant Primary or a High Velocity Planetary System in the Galactic Bulge},
author={David P. Bennett and Virginie Batista and Ian A. Bond and Clara S. Bennett and Daisuke Suzuki and Jean Philippe Beaulieu and Andrzej Udalski and Jadzia Donatowicz and Fumio Abe and Christine S. Botzler and Matthew Freeman and Daiki Fukunaga and Akihiko Fukui and Yoshitaka Itow and Naoki Koshimoto and Cho Hong Ling and Kimiaki Masuda and Yutaka Matsubara and Yasushi Muraki and S. Namba and Kouji Ohnishi and Nicholas J. Rattenbury and To. Saito and Denis J. Sullivan and Takahiro Sumi and Winston L. Sweatman and Paul J. Tristram and Naoko Tsurumi and Kohei Wada and Ph. Yock and Michael D. Albrow and Etienne Bachelet and St{\'e}phane Brillant and John A. R. Caldwell and Arnaud Cassan and Andrew A. Cole and Ernesto Corrales and Ch. Coutures and Stefan W. Dieters and D. Dominis Prester and P Fouqu{\'e} and John G. Greenhill and Keith Horne and Jae-Rim Koo and Daniel Kubas and Jean Baptiste Marquette and R. M. Martin and John Menzies and Kailash C. Sahu and Joachim Wambsganss and A. Williams and M. Choi and Darren Lee Depoy and Subo Dong and B. Scott Gaudi and Alan Gould and C. Han and Calen B. Henderson and Daniel McGregor and C.-U. Lee and Richard W. Pogge and In-Gu Shin and Jennifer C. Yee and Maciej Szymaski and Jan Skowron and Radosław Poleski and S. Kozowski and Lukasz Wyrzykowski and Marcin Kubiak and Paweł Pietrukowicz and G. Pietrzyski and I. Soszyski and Krzysztof Ulaczyk and Yiannis Tsapras and Rachel A. Street and Martin Dominik and Daniel M. Bramich and Patrick J. Browne and M. Hundertmark and N. Kains and Colin Snodgrass and Iain A. Steele and Istv{\'a}n D{\'e}k{\'a}ny and Oscar A. Gonzalez and David Heyrovsk{\'y} and Ryo Kandori and Eamonn Kerins and Philip W. Lucas and Dante Minniti and Takahiro Nagayama and Marina Rejkuba and Annie C. Robin and Roberto K. Saito},
journal={The Astrophysical Journal},
year={2014},
volume={785},
pages={155}
}
We present the first microlensing candidate for a free-floating exoplanet-exomoon system, MOA-2011-BLG-262, with a primary lens mass of M host ~ 4 Jupiter masses hosting a sub-Earth mass moon. The argument for an exomoon hinges on the system being relatively close to the Sun. The data constrain the product ML πrel where ML is the lens system mass and πrel is the lens-source relative parallax. If the lens system is nearby (large πrel), then ML is small (a few Jupiter masses) and the companion is… Expand
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#### References

SHOWING 1-10 OF 86 REFERENCES
MOA-2010-BLG-328Lb: a sub-Neptune orbiting very late M dwarf?
We analyze the planetary microlensing event MOA-2010-BLG-328. The best fit yields host and planetary masses of M h = 0.11 ± 0.01 M ☉ and M p = 9.2 ± 2.2 M ⊕, corresponding to a very late M dwarf andExpand
A Low-Mass Planet with a Possible Sub-Stellar-Mass Host in Microlensing Event MOA-2007-BLG-192
We report the detection of an extrasolar planet of mass ratio q~2×10-4 in microlensing event MOA-2007-BLG-192. The best-fit microlensing model shows both the microlensing parallax and finite sourceExpand
A SUB-SATURN MASS PLANET, MOA-2009-BLG-319Lb
We report the gravitational microlensing discovery of a sub-Saturn mass planet, MOA-2009-BLG-319Lb, orbiting a K- or M-dwarf star in the inner Galactic disk or Galactic bulge. The high-cadenceExpand
SUB-SATURN PLANET MOA-2008-BLG-310Lb: LIKELY TO BE IN THE GALACTIC BULGE
We report the detection of sub-Saturn-mass planet MOA-2008-BLG-310Lb and argue that it is the strongest candidate yet for a bulge planet. Deviations from the single-lens fit are smoothed out byExpand
Masses and Orbital Constraints for the OGLE-2006-BLG-109Lb,c Jupiter/Saturn Analog Planetary System
We present a new analysis of the Jupiter+Saturn analog system, OGLE-2006-BLG-109Lb,c, which was the first double planet system discovered with the gravitational microlensing method. This is the onlyExpand
MICROLENSING EVENT MOA-2007-BLG-400: EXHUMING THE BURIED SIGNATURE OF A COOL, JOVIAN-MASS PLANET
We report the detection of the cool, Jovian-mass planet MOA-2007-BLG-400Lb. The planet was detected in a high-magnification microlensing event (with peak magnification A max = 628) in which theExpand
The extreme microlensing event OGLE-2007-BLG-224: terrestrial parallax observation of a thick-disk brown dwarf
Parallax is the most fundamental technique for measuring distances to astronomical objects. Although terrestrial parallax was pioneered over 2000 years ago by Hipparchus (ca. 140 B.C.E.) to measureExpand
CFBDSIR2149-0403: a 4-7 Jupiter-mass free-floating planet in the young moving group AB Doradus ? ⋆
Aims. Using the CFBDSIR wide field survey for brown dwarfs, we identified CFBDSIRJ214947.2-040308.9, a late T dwarf with atypically red J KS colour. Methods. We obtained an X-Shooter spectra, withExpand
A frozen super-Earth orbiting a star at the bottom of the main sequence
Context. Microlensing is a unique method to probe low mass exoplanets beyond the snow line. However, the scientific potential of the new microlensing planet discovery is often unfulfilled due to lackExpand
A COLD NEPTUNE-MASS PLANET OGLE-2007-BLG-368Lb: COLD NEPTUNES ARE COMMON
We present the discovery of a Neptune-mass planet OGLE-2007-BLG-368Lb with a planet-star mass ratio of q = [9.5 ± 2.1] × 10^(-5) via gravitational microlensing. The planetary deviation was detectedExpand