THE SECOND MULTIPLE-PLANET SYSTEM DISCOVERED BY MICROLENSING: OGLE-2012-BLG-0026Lb, c—A PAIR OF JOVIAN PLANETS BEYOND THE SNOW LINE

Han, Cheongho; Udalski, A.; Choi, J.-Y.; Yee, Jennifer C.; Gould, Andrew; Christie, Grant; Tan, T. G.; Szymański, M. K.; Kubiak, M.; Soszyński, I.; Pietrzyński, G.; Poleski, R.; Ulaczyk, K.; Kozłowski, S.; Skowron, J.; Wyrzykowski, Ł.; Almeida, L. A.; Batista, V.; DePoy, D. L.; Dong, Subo; Drummond, J.; Gaudi, B. Scott; Hwang, Kyu-Ha; Jablonski, F.; Jung, Youn Kil; Lee, Chung-Uk; Koo, Jae‐Rim; McCormick, J.; Monard, L. A. G.; Natusch, T.; Ngan, H.; Park, H.; Pogge, Richard W.; Porritt, I.; Shin, In-Gu

doi:10.1088/2041-8205/762/2/l28

Cited by 104 publications

(63 citation statements)

References 28 publications

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“…Thanks to the weakness of the interactions of the three masses composing the lens system, all important properties of the lens system can be derived based on simple light curve inspection. This is in contrast to previously analyzed triple lens microlensing events, i.e., OGLE-2006-BLG-109 (Gaudi et al 2008Bennett et al 2010), OGLE-2012-BLG-0026 (Han et al 2013), and OGLE-2013-BLG-0341 ). The configuration of the lens in this system is one of the simplest that is possible for a triple lenses, i.e., each lens component produces a separate microlensing subevent.…”

Section: Observationscontrasting

confidence: 80%

Triple Microlens Ogle-2008-BLG-092l: Binary Stellar System With a Circumprimary Uranus-Type Planet

Poleski

Skowron

Udalski

et al. 2014

ApJ

Self Cite

103

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We present the gravitational microlensing discovery of a 4 M Uranus planet that orbits a 0.7 M star at ≈18 AU. This is the first known analog of Uranus. Similar planets, i.e., cold ice giants, are inaccessible to either radial velocity or transit methods because of the long orbital periods, while low reflected light prevents direct imaging. We discuss how similar planets may contaminate the sample of the very short microlensing events that are interpreted as free-floating planets with an estimated rate of 1.8 per main-sequence star. Moreover, the host star has a nearby stellar (or brown dwarf) companion. The projected separation of the planet is only about three times smaller than that of the companion star, suggesting significant dynamical interactions.

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Section: Observationscontrasting

confidence: 80%

Triple Microlens Ogle-2008-BLG-092l: Binary Stellar System With a Circumprimary Uranus-Type Planet

Poleski

Skowron

Udalski

et al. 2014

ApJ

Self Cite

103

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show abstract

“…Microlensing surveys have found two different two-planet systems (Gaudi et al 2008, Han et al 2013, both of which feature giant planets with orbital distances of a few astronomical units. Direct imaging has delivered a spectacular system of four giant planets that have orbital distances of ≈12-70 AU (HR 8799; Marois et al 2010).…”

Section: Multiplicitymentioning

confidence: 99%

The Occurrence and Architecture of Exoplanetary Systems

Winn

Fabrycky

2015

Annu. Rev. Astron. Astrophys.

850

709

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The basic geometry of the Solar System-the shapes, spacings, and orientations of the planetary orbits-has long been a subject of fascination as well as inspiration for planetformation theories. For exoplanetary systems, those same properties have only recently come into focus. Here we review our current knowledge of the occurrence of planets around other stars, their orbital distances and eccentricities, the orbital spacings and mutual inclinations in multiplanet systems, the orientation of the host star's rotation axis, and the properties of planets in binary-star systems.

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“…A list of exoplanets detected with microlensing searches toward the Galactic bulge is given in Table 1 (see, [3,26,27,28,29,30,31,32,33,34,35,36,37]). For some planetary systems two probable regions for the planet-to-star distance are given due to the planet and star-lens parameter degeneracy [28,38], see rows 9, 14, 17 in Table 1.…”

Section: Exoplanet Searches With Gravitational Microlensingmentioning

confidence: 99%

“…For some planetary systems two probable regions for the planet-to-star distance are given due to the planet and star-lens parameter degeneracy [28,38], see rows 9, 14, 17 in Table 1. Reports about these discoveries were published in [11,27,29,30,31,32,33,34,35,36,37,39,40,41,42,44,45,46,47,48,49,50]. In these searches we have a continuous transition from massive exoplanets to brown dwarfs, since an analysis of the anomalous microlensing event, MOA-2010-BLG-073 has been done [51], where the primary of the lens is an M-dwarf with M L1 = 0.16 ± 0.03M ⊙ while the companion has M L2 = [54] 11.0 ± 2.0M J 2 , at a perpendicular distance around 1.21 ± 0.16 AU from the host star, so the low mass component of the system is near a boundary between planets and brown dwarfs.…”

Section: Exoplanet Searches With Gravitational Microlensingmentioning

confidence: 99%

Theoretical estimations of future polarization observations for exoplanery searches with gravitational microlensing

Ingrosso¹,

Paolis²,

Nucita³

et al. 2015

Proceedings of XXII International Baldin Seminar on High Energy Physics Problems — PoS(Baldin ISHEPP XXII)

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There are different methods for finding exoplanets such as radial spectral shifts, astrometrical measurements, transits, timing etc. Gravitational microlensing (including pixel-lensing) is among the most promising techniques with the potentiality of detecting Earth-like planets at distances about a few astronomical units from their host star or near the so-called snow line with a temperature in the range 0 − 100 0 C on a solid surface of an exoplanet. We emphasize the importance of polarization measurements which can help to resolve degeneracies in theoretical models. In particular, the polarization angle could give additional information about the relative position of the lens with respect to the source.

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THE SECOND MULTIPLE-PLANET SYSTEM DISCOVERED BY MICROLENSING: OGLE-2012-BLG-0026Lb, c—A PAIR OF JOVIAN PLANETS BEYOND THE SNOW LINE

Cited by 104 publications

References 28 publications

Triple Microlens Ogle-2008-BLG-092l: Binary Stellar System With a Circumprimary Uranus-Type Planet

Triple Microlens Ogle-2008-BLG-092l: Binary Stellar System With a Circumprimary Uranus-Type Planet

The Occurrence and Architecture of Exoplanetary Systems

Theoretical estimations of future polarization observations for exoplanery searches with gravitational microlensing

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