SIMBAD references

2020AJ....159..116Z - Astron. J., 159, 116-116 (2020/March-0)

OGLE-2015-BLG-1771Lb: a microlens planet orbiting an ultracool dwarf?

ZHANG X., ZANG W., UDALSKI A., GOULD A., RYU Y.-H., WANG T., YANG H., MAO S. (The Leading Authors), MROZ P., SKOWRON J., POLESKI R., SZYMANSKI M.K., SOSZYNSKI I., PIETRUKOWICZ P., KOZLOWSKI S., ULACZYK K. (The OGLE Collaboration), ALBROW M.D., CHUNG S.-J., HAN C., HWANG K.-H., JUNG Y.K., SHIN I.-G., SHVARTZVALD Y., YEE J.C., ZHU W., CHA S.-M., KIM D.-J., KIM H.-W., KIM S.-L., LEE C.-U., LEE D.-J., LEE Y., PARK B.-G., POGGE R.W. (The KMTNet Collaboration)

Abstract (from CDS):

We report the discovery and the analysis of the short (tE< 5 days) planetary microlensing event, OGLE-2015-BLG-1771. The event was discovered by the Optical Gravitational Lensing Experiment, and the planetary anomaly (at I ∼ 19) was captured by The Korea Microlensing Telescope Network. The event has three surviving planetary models that explain the observed light curves, with planet-host mass ratio q ∼ 5.4 x 10–3, 4.5 x 10–3 and 4.5 x 10–2, respectively. The first model is the best-fit model, while the second model is disfavored by Δχ2 ∼ 3. The last model is strongly disfavored by Δχ2 ∼ 15 but not ruled out. A Bayesian analysis using a Galactic model indicates that the first two models are probably composed of a Saturn-mass planet orbiting a late M dwarf, while the third one could consist of a super-Jovian planet and a mid-mass brown dwarf. The source-lens relative proper motion is µrel ∼ 9 mas yr–1, so the source and lens could be resolved by current adaptive-optics instruments in 2020 if the lens is luminous.

Abstract Copyright: © 2020. The American Astronomical Society. All rights reserved.

Journal keyword(s): Gravitational microlensing exoplanet detection

VizieR on-line data: <Available at CDS (J/AJ/159/116): kmta.dat kmtc.dat kmts.dat ogle.dat>

Simbad objects: 18

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