OGLE-2016-BLG-1093Lb: A Sub-Jupiter-mass Spitzer Planet Located in Galactic Bulge

Abstract

OGLE-2016-BLG-1093 is a planetary microlensing event that is part of the statistical $Spitzer$ microlens parallax sample. The precise measurement of the microlens parallax effect for this event, combined with the measurement of finite source effects, leads to a direct measurement of the lens masses and system distance: $M_{\mathrm{host}}=0.38$--$0.57M_{\odot }$, $m_p=0.59$--$0.87M_{\mathrm{Jup}}$, and the system is located at the Galactic bulge ($D_L\sim 8.1$ kpc). Because this was a high-magnification event, we are also able to empirically show that the "cheap-space parallax" concept Gould & Yee (2012) produces well-constrained (and consistent) results for $|{\pi }_{\mathrm{E}}|$. This demonstrates that this concept can be extended to many two-body lenses. Finally, we briefly explore systematics in the $Spitzer$ light curve in this event and show that their potential impact is strongly mitigated by the color-constraint.

9 Figures, 3 Tables, submitted to the AAS journal

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Cited by in corpus (3)

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• Constraining Lens Masses in Moderately to Highly Magnified Microlensing Events from Gaia