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OGLE-2016-BLG-0693LB: Probing the Brown Dwarf Desert with Microlensing

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arxiv 1707.01222 v2 pith:KOTNA4VH submitted 2017-07-05 astro-ph.EP astro-ph.SR

OGLE-2016-BLG-0693LB: Probing the Brown Dwarf Desert with Microlensing

Y.-H. Ryu , A. Udalski , J. C. Yee , M. D. Albrow , S.-J. Chung , A. Gould , C. Han , K.-H. Hwang
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Y. K. Jung I.-G. Shin W. Zhu S.-M. Cha D.-J. Kim H.-W. Kim S.-L. Kim C.-U. Lee Y. Lee B.-G. Park R. W. Pogge P. Pietrukowicz S. Kozlowski R. Poleski J. Skowron P. Mroz M. K. Szymanski I. Soszynski M. Pawlak K. Ulaczyk
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We present an analysis of microlensing event OGLE-2016-BLG-0693, based on the survey-only microlensing observations by the OGLE and KMTNet groups. In order to analyze the light curve, we consider the effects of parallax, orbital motion, and baseline slope, and also refine the result using a Galactic model prior. From the microlensing analysis, we find that the event is a binary composed of a low-mass brown dwarf 49+-20 M_J companion and a K- or G-dwarf host, which lies at a distance 5.0+-0.6 kpc toward the Galactic bulge. The projected separation between the brown dwarf and its host star is less than 5 AU, and thus it is likely that the brown dwarf companion is located in the brown dwarf desert.

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Cited by 2 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score.

  1. The GAPS Programme with HARPS-N at TNG LXXVII. Occurrence rates of small close-in planets in the presence of cold Jupiters

    astro-ph.EP 2026-07 accept novelty 6.0

    Close-in small planets occur at ~5–16% around cold-Jupiter hosts, with no strong overall correlation at average stellar mass/metallicity, but elevated rates in dynamically stable inner regions.

  2. The GAPS Programme with HARPS-N at TNG LXXVII. Occurrence rates of small close-in planets in the presence of cold Jupiters

    astro-ph.EP 2026-07 accept novelty 5.5

    Occurrence rates of hot/warm/cool Neptunes and Super-Earths around cold-Jupiter hosts are ~5–16%, higher when the outer giant leaves a stable inner zone, with no strong ISP–CJ correlation at average metallicity.