2017AJ....153....1K

Query : 2017AJ....153....1K

2017AJ....153....1K - Astron. J., 153, 1-1 (2017/January-0)

OGLE-2012-BLG-0950Lb: the first planet mass measurement from only microlens parallax and lens flux.

KOSHIMOTO N., UDALSKI A., BEAULIEU J.P., SUMI T., BENNETT D.P., BOND I.A., RATTENBURY N., FUKUI A., BATISTA V., MARQUETTE J.B., BRILLANT S., ABE F., ASAKURA Y., BHATTACHARYA A., DONACHIE M., FREEMAN M., HIRAO Y., ITOW Y., LI M.C.A., LING C.H., MASUDA K., MATSUBARA Y., MATSUO T., MURAKI Y., NAGAKANE M., OHNISHI K., OYOKAWA H., SAITO T., SHARAN A., SHIBAI H., SULLIVAN D.J., SUZUKI D., TRISTRAM P.J., YONEHARA A. (The MOA Collaboration), KOZLOWSKI S., PIETRUKOWICZ P., POLESKI R., SKOWRON J., SOSZYNSKI I., SZYMANSKI M.K., ULACZYK K., WYRZYKOWSKI L. (The OGLE Collaboration)

Abstract (from CDS):

We report the discovery of a microlensing planet OGLE-2012-BLG-0950Lb with a planet/host mass ratio of q≃2×10–4. A long term distortion detected in both MOA and OGLE light curve can be explained by the microlens parallax due to the Earth's orbital motion around the Sun. Although the finite source effect is not detected, we obtain the lens flux by the high resolution Keck AO observation. Combining the microlens parallax and the lens flux reveal the nature of the lens: a planet with mass of Mp=35–9+17M⊕ is orbiting around an M-dwarf with mass of Mhost=0.56–0.16+0.12M☉ with a planet-host projected separation of r⊥=2.7–0.7+0.6 au located at DL=3.0–1.1+0.8 kpc from us. This is the first mass measurement from only microlens parallax and the lens flux without the finite source effect. In the coming space observation-era with Spitzer, K2, Euclid, and WFIRST, we expect many such events for which we will not be able to measure any finite source effect. This work demonstrates an ability of mass measurements in such events.

Abstract Copyright: © 2016. The American Astronomical Society. All rights reserved.

Journal keyword(s): gravitational lensing: micro - planetary systems - planetary systems

Simbad objects: 3

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Number of rows : 3
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 NAME EWS 2012-BLG-0026b Pl 17 34 18.7004610096 -27 08 33.867112596           ~ 12 1
2 MOA 2012-BLG-527 * 18 08 04.62 -29 43 53.7           ~ 28 0
3 MOA 2012-BLG-527b Pl 18 08 04.62 -29 43 53.7           ~ 7 0

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