2013A&A...552A..70K


C.D.S. - SIMBAD4 rel 1.7 - 2020.01.23CET01:21:22

2013A&A...552A..70K - Astronomy and Astrophysics, volume 552A, 70-70 (2013/4-1)

A giant planet beyond the snow line in microlensing event OGLE-2011-BLG-0251.

KAINS N., STREET R.A., CHOI J.-Y., HAN C., UDALSKI A., ALMEIDA L.A., JABLONSKI F., TRISTRAM P.J., JORGENSEN U.G., SZYMANSKI M.K., KUBIAK M., PIETRZYNSKI G., SOSZYNSKI I., POLESKI R., KOZLOWSKI S., PIETRUKOWICZ P., ULACZYK K., WYRZYKOWSKI L., SKOWRON J., ALSUBAI K.A., BOZZA V., BROWNE P., BURGDORF M.J., CALCHI NOVATI S., DODDS P., DOMINIK M., DREIZLER S., FANG X.-S., GRUNDAHL F., GU C.-H., HARDIS S., HARPSOE K., HESSMAN F.V., HINSE T.C., HORNSTRUP A., HUNDERTMARK M., JESSEN-HANSEN J., KERINS E., LIEBIG C., LUND M., LUNDKVIST M., MANCINI L., MATHIASEN M., PENNY M.T., RAHVAR S., RICCI D., SAHU K.C., SCARPETTA G., SKOTTFELT J., SNODGRASS C., SOUTHWORTH J., SURDEJ J., TREGLOAN-REED J., WAMBSGANSS J., WERTZ O., BAJEK D., BRAMICH D.M., HORNE K., IPATOV S., STEELE I.A., TSAPRAS Y., ABE F., BENNETT D.P., BOND I.A., BOTZLER C.S., CHOTE P., FREEMAN M., FUKUI A., FURUSAWA K., ITOW Y., LING C.H., MASUDA K., MATSUBARA Y., MIYAKE N., MURAKI Y., OHNISHI K., RATTENBURY N., SAITO T., SULLIVAN D.J., SUMI T., SUZUKI D., SUZUKI K., SWEATMAN W.L., TAKINO S., WADA K., YOCK P.C.M., ALLEN W., BATISTA V., CHUNG S.-J., CHRISTIE G., DEPOY D.L., DRUMMOND J., GAUDI B.S., GOULD A., HENDERSON C., JUNG Y.-K., KOO J.-R., LEE C.-U., McCORMICK J., McGREGOR D., MUNOZ J.A., NATUSCH T., NGAN H., PARK H., POGGE R.W., SHIN I.-G., YEE J., ALBROW M.D., BACHELET E., BEAULIEU J.-P., BRILLANT S., CALDWELL J.A.R., CASSAN A., COLE A., CORRALES E., COUTURES C., DIETERS S., DOMINIS PRESTER D., DONATOWICZ J., FOUQUE P., GREENHILL J., KANE S.R., KUBAS D., MARQUETTE J.-B., MARTIN R., MEINTJES P., MENZIES J., POLLARD K.R., WILLIAMS A., WOUTERS D. and ZUB M.

Abstract (from CDS):

We present the analysis of the gravitational microlensing event OGLE-2011-BLG-0251. This anomalous event was observed by several survey and follow-up collaborations conducting microlensing observations towards the Galactic bulge. Based on detailed modelling of the observed light curve, we find that the lens is composed of two masses with a mass ratio q=1.9x10–3. Thanks to our detection of higher-order effects on the light curve due to the Earth's orbital motion and the finite size of source, we are able to measure the mass and distance to the lens unambiguously. We find that the lens is made up of a planet of mass 0.53±0.21MJ orbiting an M dwarf host star with a mass of 0.26±0.11M. The planetary system is located at a distance of 2.57±0.61kpc towards the Galactic centre. The projected separation of the planet from its host star is d=1.408±0.019, in units of the Einstein radius, which corresponds to 2.72±0.75AU in physical units. We also identified a competitive model with similar planet and host star masses, but with a smaller orbital radius of 1.50±0.50AU. The planet is therefore located beyond the snow line of its host star, which we estimate to be around ∼ 1-1.5AU.

Abstract Copyright:

Journal keyword(s): gravitational lensing: weak - planets and satellites: detection - planetary systems - Galaxy: bulge

Simbad objects: 4

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Number of rows : 4

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 NAME OGLE-2011-BLG-0251L * 17 38 14.18 -27 08 10.1           ~ 4 1
2 NAME EWS 2011-BLG-251b Pl 17 38 14.18 -27 08 10.1           ~ 6 1
3 NAME Gal Center reg 17 45 40.04 -29 00 28.1           ~ 11173 0
4 NAME Galactic Bulge reg ~ ~           ~ 3280 0

    Equat.    Gal    SGal    Ecl

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2020.01.23-01:21:22

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