title: Discovery of a Jupiter/Saturn analog with gravitational microlensing.
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 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.
authors.affiliation: Department of Astronomy, Ohio State University, 140 West 18th Avenue, Columbus, OH 43210, USA. gaudi@astronomy.ohio-state.edu
authors.forename: B S
authors.initials: BS
authors.lastname: Gaudi
authors.forename: D P
authors.initials: DP
authors.lastname: Bennett
authors.forename: A
authors.initials: A
authors.lastname: Udalski
authors.forename: A
authors.initials: A
authors.lastname: Gould
authors.forename: G W
authors.initials: GW
authors.lastname: Christie
authors.forename: D
authors.initials: D
authors.lastname: Maoz
authors.forename: S
authors.initials: S
authors.lastname: Dong
authors.forename: J
authors.initials: J
authors.lastname: McCormick
authors.forename: M K
authors.initials: MK
authors.lastname: Szymanski
authors.forename: P J
authors.initials: PJ
authors.lastname: Tristram
authors.forename: S
authors.initials: S
authors.lastname: Nikolaev
authors.forename: B
authors.initials: B
authors.lastname: Paczynski
authors.forename: M
authors.initials: M
authors.lastname: Kubiak
authors.forename: G
authors.initials: G
authors.lastname: Pietrzynski
authors.forename: I
authors.initials: I
authors.lastname: Soszynski
authors.forename: O
authors.initials: O
authors.lastname: Szewczyk
authors.forename: K
authors.initials: K
authors.lastname: Ulaczyk
authors.forename: L
authors.initials: L
authors.lastname: Wyrzykowski
authors.forename: D L
authors.initials: DL
authors.lastname: Depoy
authors.forename: C
authors.initials: C
authors.lastname: Han
authors.forename: S
authors.initials: S
authors.lastname: Kaspi
authors.forename: C-U
authors.initials: CU
authors.lastname: Lee
authors.forename: F
authors.initials: F
authors.lastname: Mallia
authors.forename: T
authors.initials: T
authors.lastname: Natusch
authors.forename: R W
authors.initials: RW
authors.lastname: Pogge
authors.forename: B-G
authors.initials: BG
authors.lastname: Park
authors.forename: F
authors.initials: F
authors.lastname: Abe
authors.forename: I A
authors.initials: IA
authors.lastname: Bond
authors.forename: C S
authors.initials: CS
authors.lastname: Botzler
authors.forename: A
authors.initials: A
authors.lastname: Fukui
authors.forename: J B
authors.initials: JB
authors.lastname: Hearnshaw
authors.forename: Y
authors.initials: Y
authors.lastname: Itow
authors.forename: K
authors.initials: K
authors.lastname: Kamiya
authors.forename: A V
authors.initials: AV
authors.lastname: Korpela
authors.forename: P M
authors.initials: PM
authors.lastname: Kilmartin
authors.forename: W
authors.initials: W
authors.lastname: Lin
authors.forename: K
authors.initials: K
authors.lastname: Masuda
authors.forename: Y
authors.initials: Y
authors.lastname: Matsubara
authors.forename: M
authors.initials: M
authors.lastname: Motomura
authors.forename: Y
authors.initials: Y
authors.lastname: Muraki
authors.forename: S
authors.initials: S
authors.lastname: Nakamura
authors.forename: T
authors.initials: T
authors.lastname: Okumura
authors.forename: K
authors.initials: K
authors.lastname: Ohnishi
authors.forename: N J
authors.initials: NJ
authors.lastname: Rattenbury
authors.forename: T
authors.initials: T
authors.lastname: Sako
authors.forename: To
authors.initials: T
authors.lastname: Saito
authors.forename: S
authors.initials: S
authors.lastname: Sato
authors.forename: L
authors.initials: L
authors.lastname: Skuljan
authors.forename: D J
authors.initials: DJ
authors.lastname: Sullivan
authors.forename: T
authors.initials: T
authors.lastname: Sumi
authors.forename: W L
authors.initials: WL
authors.lastname: Sweatman
authors.forename: P C M
authors.initials: PC
authors.lastname: Yock
authors.forename: M D
authors.initials: MD
authors.lastname: Albrow
authors.forename: A
authors.initials: A
authors.lastname: Allan
authors.forename: J-P
authors.initials: JP
authors.lastname: Beaulieu
authors.forename: M J
authors.initials: MJ
authors.lastname: Burgdorf
authors.forename: K H
authors.initials: KH
authors.lastname: Cook
authors.forename: C
authors.initials: C
authors.lastname: Coutures
authors.forename: M
authors.initials: M
authors.lastname: Dominik
authors.forename: S
authors.initials: S
authors.lastname: Dieters
authors.forename: P
authors.initials: P
authors.lastname: Fouqué
authors.forename: J
authors.initials: J
authors.lastname: Greenhill
authors.forename: K
authors.initials: K
authors.lastname: Horne
authors.forename: I
authors.initials: I
authors.lastname: Steele
authors.forename: Y
authors.initials: Y
authors.lastname: Tsapras
authors.forename: B
authors.initials: B
authors.lastname: Chaboyer
authors.forename: A
authors.initials: A
authors.lastname: Crocker
authors.forename: S
authors.initials: S
authors.lastname: Frank
authors.forename: B
authors.initials: B
authors.lastname: Macintosh