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

By A. Udalski, M. Jaroszynski, B. Paczyński, M. Kubiak, M. Szymański, I. Soszyński, G. Pietrzyński, K. Ulaczyk, O. Szewczyk, Ł. Wyrzykowski and 23 more. 2005

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We report the discovery of a several-Jupiter-mass planetary companion to the primary lens star in microlensing event OGLE-2005-BLG-071. Precise (≲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 = mp/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.

Subfields: Astronomy and Astrophysics

View Paper: https://www.semanticscholar.org/paper/c23e80c041fc85c3284d39bfcd5b4dbb6bfd21d7

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Citations in the corpus

• 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): “…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 MJup – Gould et al. 2006).”
• 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 COLD NEPTUNE-MASS PLANET OGLE-2007-BLG-368Lb: Cold neptunes are common (2009, methodology): “So far 8 planetary systems with 9 planets have been found by this technique (Udalski et al. 2005; Beaulieu et al. 2006; Gould et al. 2006; Gaudi et al. 2008; Bennett et al. 2008; Dong et al. 2009b; Janczak et al. 2010), which have very distinct properties from those detected by other techniques.”
• 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).”
• Microlensing Surveys for Exoplanets (2012, background): “In the case of OGLE-2005-BLG-071Lb (Udalski et al. 2005), this categorization is fairly secure: a combination of HST photometry, finite source effects, and orbital parallax allow for a robust −−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−→ Figure 7 (a) Data and best-fit…”
• 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.”
• Microlens OGLE-2005-BLG-169 Implies That Cool Neptune-like Planets Are Common (2006, unknown): “The first was the Jovian mass-ratio OGLE-2005-BLG071Lb (Udalski et al. 2005).”
• TESTING IN SITU ASSEMBLY WITH THE KEPLER PLANET CANDIDATE SAMPLE (2013, background): “…more characteristic of the planets in our own solar system (Butler & Marcy 1996; Boisse et al. 2012), at great distances from their host stars (Udalski et al. 2005; Gaudi et al. 2008; Kalas et al. 2008; Marois et al. 2008, 2010), and potentially even as free-floating objects (Sumi et al.…”
• 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): “Then in April 2005, µFUN intensively followed the (by those days’ standards) high- mag event OGLE-2005-BLG-071, which resulted in the detection of the second microlensing planet (Udalski et al. 2005).”
• A Low-Mass Planet with a Possible Sub-Stellar-Mass Host in Microlensing Event MOA-2007-BLG-192 (2008, background): “This event is an example of a high magnification event, which allows the detection of planets via perturbations of the central or “stellar” caustic (Griest & Safizadeh 1998; Rhie et al. 2000; Rattenbury et al 2002; Udalski et al. 2005; Gould et al. 2006; Gaudi et al. 2008).”
• 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).”