2011ApJ...728..120M

Query : 2011ApJ...728..120M

2011ApJ...728..120M - Astrophys. J., 728, 120 (2011/February-3)

A Sub-Saturn mass planet, MOA-2009-BLG-319Lb.

MIYAKE N., SUMI T., DONG S., STREET R., MANCINI L., GOULD A., BENNETT D.P., TSAPRAS Y., YEE J.C., ALBROW M.D., BOND I.A., FOUQUE P., BROWNE P., HAN C., SNODGRASS C., FINET F., FURUSAWA K., HARPSOE K., ALLEN W., HUNDERTMARK M., FREEMAN M., SUZUKI D., ABE F., BOTZLER C.S., DOUCHIN D., FUKUI A., HAYASHI F., HEARNSHAW J.B., HOSAKA S., ITOW Y., KAMIYA K., KILMARTIN P.M., KORPELA A., LIN W., LING C.H., MAKITA S., MASUDA K., MATSUBARA Y., MURAKI Y., NAGAYAMA T., NISHIMOTO K., OHNISHI K., PERROTT Y.C., RATTENBURY N., SAITO T., SKULJAN L., SULLIVAN D.J., SWEATMAN W.L., TRISTRAM P.J., WADA K., YOCK P.C.M. (The MOA Collaboration), BOLT G., BOS M., CHRISTIE G.W., DEPOY D.L., DRUMMOND J., GAL-YAM A., GAUDI B.S., GORBIKOV E., HIGGINS D., HWANG K.-H., JANCZAK J., KASPI S., LEE C.-U., KOO J.-R., KOZLOWSKI S., LEE Y., MALLIA F., MAURY A., MAOZ D., McCORMICK J., MONARD L.A.G., MOORHOUSE D., MUNOZ J.A., NATUSCH T., OFEK E.O., POGGE R.W., POLISHOOK D., SANTALLO R., SHPORER A., SPECTOR O., THORNLEY G. (The {mu}FUN Collaboration), ALLAN A., BRAMICH D.M., HORNE K., KAINS N., STEELE I. (The RoboNet Collaboration), BOZZA V., BURGDORF M.J., CALCHI NOVATI S., DOMINIK M., DREIZLER S., GLITRUP M., HESSMAN F.V., HINSE T.C., JORGENSEN U.G., LIEBIG C., MAIER G., MATHIASEN M., RAHVAR S., RICCI D., SCARPETTA G., SKOTTFELT J., SOUTHWORTH J., SURDEJ J., WAMBSGANSS J., ZIMMER F. (The MiNDSTEp Consortium), BATISTA V., BEAULIEU J.P., BRILLANT S., CASSAN A., COLE A., CORRALES E., COUTURES Ch., DIETERS S., GREENHILL J., KUBAS D., MENZIES J. (The PLANET Collaboration)

Abstract (from CDS):

We report the gravitational microlensing discovery of a sub-Saturn mass planet, MOA-2009-BLG-319Lb, orbiting a K- or M-dwarf star in the inner Galactic disk or Galactic bulge. The high-cadence observations of the MOA-II survey discovered this microlensing event and enabled its identification as a high-magnification event approximately 24 hr prior to peak magnification. As a result, the planetary signal at the peak of this light curve was observed by 20 different telescopes, which is the largest number of telescopes to contribute to a planetary discovery to date. The microlensing model for this event indicates a planet-star mass ratio of q = (3.95±0.02)x10–4 and a separation of d = 0.97537±0.00007 in units of the Einstein radius. A Bayesian analysis based on the measured Einstein radius crossing time, tE, and angular Einstein radius, θE, along with a standard Galactic model indicates a host star mass of ML = 0.38+0.34–0.18M☉ and a planet mass of Mp= 50+44–24 M⊕, which is half the mass of Saturn. This analysis also yields a planet-star three-dimensional separation of a = 2.4+1.2–0.6 AU and a distance to the planetary system of DL= 6.1+1.1–1.2kpc. This separation is ∼2 times the distance of the snow line, a separation similar to most of the other planets discovered by microlensing.

Abstract Copyright: ∼

Journal keyword(s): gravitational lensing: micro - planetary systems

Simbad objects: 14

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Number of rows : 14
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 NAME Galactic Center reg 17 45 39.60213 -29 00 22.0000           ~ 16269 0
2 NAME EWS 2005-BLG-071b Pl 17 50 09.77 -34 40 23.5           ~ 52 1
3 NAME EWS 2006-BLG-109b Pl 17 52 34.55 -30 05 15.7           ~ 46 1
4 MOA 2008-BLG-310b Pl 17 54 14.53 -34 46 41.0           ~ 14 1
5 NAME EWS 2005-BLG-390b Pl 17 54 19.2 -30 22 38           ~ 80 1
6 MOA 2007-BLG-308b Pl 17 56 25.96 -32 14 14.7           ~ 15 1
7 MOA 2003-BLG-53b Pl 18 05 16.35 -28 53 42.0           ~ 26 1
8 NAME EWS 2005-BLG-169b Pl 18 06 05.32 -30 43 57.5           ~ 42 1
9 MOA 2009-BLG-319 * 18 06 58.0 -26 49 11           K 16 1
10 MOA 2009-BLG-319b Pl 18 06 58.0 -26 49 11           ~ 12 1
11 MOA 2007-BLG-192b Pl 18 08 03.798 -27 09 00.27           ~ 33 1
12 MOA 2007-BLG-400 * 18 09 41.980 -29 13 26.95           ~ 47 1
13 MOA 2007-BLG-400b Pl 18 09 41.980 -29 13 26.95           ~ 35 1
14 NAME Galactic Bulge reg ~ ~           ~ 4794 0

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