Discovery of a Jupiter/Saturn Analog with Gravitational Microlensing
B. S. Gaudi,David P. Bennett,Andrzej Udalski,Andrew Gould,G. W. Christie,D. Maoz,Subo Dong,Jennie McCormick,Michał K. Szymański,P. J. Tristram,S. Nikolaev,Bohdan Paczynski,M. Kubiak,Grzegorz Pietrzyński,Grzegorz Pietrzyński,Igor Soszyński,O. Szewczyk,Krzysztof Ulaczyk,Łukasz Wyrzykowski,Łukasz Wyrzykowski,Darren L. DePoy,C. Han,Shai Kaspi,C.-U. Lee,F. Mallia,Tim Natusch,Richard W. Pogge,Byeong-Gon Park,Fumio Abe,Ian A. Bond,C. S. Botzler,Akihiko Fukui,John B. Hearnshaw,Yoshitaka Itow,Kisaku Kamiya,A. V. Korpela,P. M. Kilmartin,W. Lin,Kimiaki Masuda,Yutaka Matsubara,M. Motomura,Yasushi Muraki,Shota Nakamura,Teppei Okumura,Kouji Ohnishi,Nicholas J. Rattenbury,Takashi Sako,To. Saito,Shuji Sato,L. Skuljan,Denis J. Sullivan,Takahiro Sumi,Winston L. Sweatman,Philip Yock,Michael D. Albrow,Alasdair Allan,J.-P. Beaulieu,Martin Burgdorf,K. H. Cook,C. Coutures,Martin Dominik,S. Dieters,Pascal Fouqué,J. G. Greenhill,Keith Horne,Iain A. Steele,Yiannis Tsapras,Brian Chaboyer,A. Crocker,Stephan Frank,Bruce Macintosh +70 more
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Two planets with masses that could not have been detected with other techniques are identified; their discovery from only six confirmed microlensing planet detections suggests that solar system analogs may be common.Abstract:
Searches for extrasolar planets have uncovered an astonishing diversity of planetary systems, yet the frequency of solar system analogs remains unknown. The gravitational microlensing planet search method is potentially sensitive to multiple-planet systems containing analogs of all the solar system planets except Mercury. We report the detection of a multiple-planet system with microlensing. We identify two planets with masses of ∼0.71 and ∼0.27 times the mass of Jupiter and orbital separations of ∼2.3 and ∼4.6 astronomical units orbiting a primary star of mass ∼0.50 solar mass at a distance of ∼1.5 kiloparsecs. This system resembles a scaled version of our solar system in that the mass ratio, separation ratio, and equilibrium temperatures of the planets are similar to those of Jupiter and Saturn. These planets could not have been detected with other techniques; their discovery from only six confirmed microlensing planet detections suggests that solar system analogs may be common.read more
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