OGLE 2003-BLG-235/MOA 2003-BLG-53: A Planetary Microlensing Event

By I. Bond, A. Udalski, M. Jaroszynski, N. Rattenbury, B. Paczyński, I. Soszyński, L. Wyrzykowski, M. Szymański, M. Kubiak, O. Szewczyk and 22 more. 2004

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We present observations of the unusual microlensing event OGLE 2003-BLG-235/MOA 2003-BLG-53. In this event, a short-duration (~7 days) low-amplitude deviation in the light curve due to a single-lens profile was observed in both the MOA (Microlensing Observations in Astrophysics) and OGLE (Optical Gravitational Lensing Experiment) survey observations. We find that the observed features of the light curve can only be reproduced using a binary microlensing model with an extreme (planetary) mass ratio of 0.0039 for the lensing system. If the lens system comprises a main-sequence primary, we infer that the secondary is a planet of about 1.5 Jupiter masses with an orbital radius of ~3 AU.

Subfields: Astronomy and Astrophysics, Instrumentation

View Paper: https://www.semanticscholar.org/paper/0fcc7f360490e1a2d048ba469a7196d5d511b5de

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Citations in the corpus

Microlensing Surveys for Exoplanets (2012, background): “To date, the discovery via microlensing surveys of 14 planets in 13 systems have been published (Bond et al. 2004, Udalski et al. 2005, Beaulieu et al. 2006, Gould et al. 2006, Bennett et al. 2008, Gaudi et al. 2008, Dong et al. 2009a, Janczak et al. 2010, Sumi et al. 2010, Batista et al. 2011,…”
The Core Accretion Model Predicts Few Jovian-Mass Planets Orbiting Red Dwarfs (2004, background): “Recent work (Bond et al. 2004) reports an unusual light curve for a G-type source star in the direction of the Galactic bulge.”
Gravitational lensing (2010, background): “While the first planets detected in this way had Jupiter-like masses [47, 479], even Earth-like planets have been found ([33], see figure 7).”
A Jovian-Mass Planet in Microlensing Event OGLE-2005-BLG-071 (2005, methodology): “To date, there has been only one robust detection of a planet using the microlensing technique (Bond et al. 2004).”
The Gemini Deep Planet Survey (2007, background): “Very recently, a few exoplanets have been detected by gravitational microlensing (Bond et al. 2004; Udalski et al. 2005; Beaulieu et al. 2006; Gould et al. 2006); these planets have separations of∼2– 5 AU.”
MOA-2009-BLG-387Lb: a massive planet orbiting an M dwarf (2011, methodology): “Over the past decade, the gravitational microlensing method has led to detection of ten exoplanets (Bond et al. 2004; Udalski et al. 2005; Beaulieu et al. 2006; Gould et al. 2006; Gaudi et al. 2008; Article published by EDP Sciences A102, page 1 of 16 Bennett et al. 2008; Dong et al. 2009b; Janczak…”
A New Planet around an M Dwarf: Revealing a Correlation between Exoplanets and Stellar Mass (2007, background): “Three additional planets have been discovered orbiting distant (∼ 1 kpc) low–mass stars by gravitational lensing surveys (Bond et al. 2004; Gould et al. 2006; Beaulieu et al. 2006; Bennett et al. 2006).”
The HARPS search for southern extra-solar planets. X. A m sin i = 11 M_â planet around the nearby spotted M dwarf GJ 674 (2007, background): “That technique has detected four putative planets that are probably orbiting M dwarfs : OGLE235-MOA53b (mp ∼ 2.6 MJup – Bond et al. 2004; Bennett et al. 2006), OGLE-05-071Lb (mp = 0.9 MJup – Udalski et al. 2005), OGLE-05-390Lb (mp = 0.017 MJup – Beaulieu et al. 2006), and OGLE-05-169Lb (mp = 0.04 MJ”
Difference imaging photometry of blended gravitational microlensing events with a numerical kernel (2009, background): “…et al. 1993) and stellar atmospheres (Albrow et al. 1999, 2001a,b; Fields et al. 2003; Cassan et al. 2004), and in the search for extrasolar planets (Albrow et al. 2000, 2001c; Gaudi et al. 2002; Bond et al. 2004; Udalski et al. 2005; Beaulieu et al. 2006; Dong et al. 2008; Gaudi et al. 2008).”
NEW DEBRIS DISKS AROUND YOUNG, LOW-MASS STARS DISCOVERED WITH THE SPITZER SPACE TELESCOPE (2009, unknown): “…with the radial velocity technique, in the past decade, but also through direct imaging, transits, microlensing, and pulsar timing (Marois et al. 2008; Kalas et al. 2008; Butler et al. 2006; Marcy et al. 2005; Bond et al. 2004; Beaulieu et al. 2006; Wolszczan & Frail 1992, and references therein).”
A COLD NEPTUNE-MASS PLANET OGLE-2007-BLG-368Lb: Cold neptunes are common (2009, methodology): “In 2003, the gravitational microlensing method yielded its first definitive exoplanet discovery (Bond et al. 2004).”
Exploring the Frequency of Close-in Jovian Planets around M Dwarfs (2006, background): “There is the possibility that the giant planet detected by microlensing (Bond et al. 2004) also orbits an M dwarf, but the exact spectral type of the primary lens has yet not been determined.”
FREQUENCY OF SOLAR-LIKE SYSTEMS AND OF ICE AND GAS GIANTS BEYOND THE SNOW LINE FROM HIGH-MAGNIFICATION MICROLENSING EVENTS IN 2005–2008 (2010, background): “The first secure microlensing planet, OGLE-2003-BLG-235Lb (Bond et al. 2004) was discovered by means of such an internal alert.”
Planet formation and migration (2005, background): “One planet (OGLE235–MOA53) has been found in 2004 simultaneously by the MOA and OGLE collaborations (Bond et al 2004).”