Publication Date:
2008-02-16
Description:
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 approximately 0.71 and approximately 0.27 times the mass of Jupiter and orbital separations of approximately 2.3 and approximately 4.6 astronomical units orbiting a primary star of mass approximately 0.50 solar mass at a distance of approximately 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.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Gaudi, B S -- Bennett, D P -- Udalski, A -- Gould, A -- Christie, G W -- Maoz, D -- Dong, S -- McCormick, J -- Szymanski, M K -- Tristram, P J -- Nikolaev, S -- Paczynski, B -- Kubiak, M -- Pietrzynski, G -- Soszynski, I -- Szewczyk, O -- Ulaczyk, K -- Wyrzykowski, L -- OGLE Collaboration -- Depoy, D L -- Han, C -- Kaspi, S -- Lee, C-U -- Mallia, F -- Natusch, T -- Pogge, R W -- Park, B-G -- MuFUN Collaboration -- Abe, F -- Bond, I A -- Botzler, C S -- Fukui, A -- Hearnshaw, J B -- Itow, Y -- Kamiya, K -- Korpela, A V -- Kilmartin, P M -- Lin, W -- Masuda, K -- Matsubara, Y -- Motomura, M -- Muraki, Y -- Nakamura, S -- Okumura, T -- Ohnishi, K -- Rattenbury, N J -- Sako, T -- Saito, To -- Sato, S -- Skuljan, L -- Sullivan, D J -- Sumi, T -- Sweatman, W L -- Yock, P C M -- MOA Collaboration -- Albrow, M D -- Allan, A -- Beaulieu, J-P -- Burgdorf, M J -- Cook, K H -- Coutures, C -- Dominik, M -- Dieters, S -- Fouque, P -- Greenhill, J -- Horne, K -- Steele, I -- Tsapras, Y -- PLANET and RoboNet Collaborations -- Chaboyer, B -- Crocker, A -- Frank, S -- Macintosh, B -- New York, N.Y. -- Science. 2008 Feb 15;319(5865):927-30. doi: 10.1126/science.1151947.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Astronomy, Ohio State University, 140 West 18th Avenue, Columbus, OH 43210, USA. gaudi@astronomy.ohio-state.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/18276883" target="_blank"〉PubMed〈/a〉
Print ISSN:
0036-8075
Electronic ISSN:
1095-9203
Topics:
Biology
,
Chemistry and Pharmacology
,
Computer Science
,
Medicine
,
Natural Sciences in General
,
Physics
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