A Jovian-Mass Planet in Microlensing Event OGLE-2005-BLG-071

A Udalski, M Jaroszynski, B Paczynski, M Kubiak, M K Szymanski, I Soszynski, G Pietrzynski, K Ulaczyk, O Szewczyk, L Wyrzykowski, G W Christie, D L DePoy, S Dong, A Gal-Yam, B S Gaudi, A Gould, C Han, S Lepine, J McCormick, B.-G ParkR W Pogge, D P Bennett, I A Bond, Y Muraki, P J Tristram, P C M Yock, J.-P Beaulieu, D M Bramich, S W Dieters, J Greenhill, K Hill, Keith Douglas Horne, D Kubas, PLANET RoboNet Collaborat, MOA Collaborat, muFUN Collaborat, OGLE Collaborat

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189 Citations (Scopus)

Abstract

We report the discovery of a several-Jupiter - mass planetary companion to the primary lens star in microlensing event OGLE-2005-BLG-071. Precise ( less than or similar to 1%) photometry at the peak of the event yields an extremely high signal-to-noise ratio detection of a deviation from the light curve expected from an isolated lens. The planetary character of this deviation is easily and unambiguously discernible from the gross features of the light curve. Detailed modeling yields a tightly constrained planet-star mass ratio of q = m(p) / M = 0.0071 +/- 0.0003. This is the second robust detection of a planet with microlensing, demonstrating that the technique itself is viable and that planets are not rare in the systems probed by microlensing, which typically lie several kiloparsecs toward the Galactic center.

Original languageEnglish
Pages (from-to)L109-L112
Number of pages4
JournalAstrophysical Journal Letters
Volume628
Issue number2
DOIs
Publication statusPublished - 1 Aug 2005

Keywords

  • galaxy : bulge
  • gravitational lensing
  • planetary systems
  • GRAVITATIONAL LENSING EXPERIMENT
  • EXTRASOLAR PLANETS
  • HIGH-MAGNIFICATION
  • GALACTIC BULGE
  • COMPANIONS
  • STAR
  • CONSTRAINTS
  • PHOTOMETRY
  • TRANSITS
  • CAMPAIGN

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