MOA-2009-BLG-387Lb: A massive planet orbiting an M dwarf

Batista, V., Gould, A., Dieters, S., Dong, S., Bond, I., Beaulieu, J. P., Maoz, D., Monard, B., Christie, G. W., McCormick, J., Albrow, M. D., Horne, K., Tsapras, Y., Burgdorf, M. J., Novati, S. Calchi, Skottfelt, J., Caldwell, J., Kozlowski, S., Kubas, D., Gaudi, B. S., Han, C., Bennett, D. P., An, J., Abe, F., Botzler, C. S., Douchin, D., Freeman, M., Fukui, A., Furusawa, K., 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., Miyake, N., Muraki, Y., Nagaya, M., Nishimoto, K., Ohnishi, K., Okumura, T., Perrott, Y. C., Rattenbury, N., Saito, To., Sullivan, D. J., Sumi, T., Sweatman, W. L., Tristram, P. J., Von Seggern, E., Yock, P. C. M., Brillant, S., Calitz, J. J., Cassan, A., Cole, A., Cook, K., Coutures, C., Prester, D. Dominis, Donatowicz, J., Greenhill, J., Hoffman, M., Jablonski, F., Kane, S. R., Kains, N., Marquette, J. -B., Martin, R., Martioli, E., Meintjes, P., Menzies, J., Pedretti, E., Pollard, K., Sahu, K. C., Vinter, C., Wambsganss, J., Watson, R., Williams, A., Zub, M., Allen, W., Bolt, G., Bos, M., Depoy, D. L., Drummond, J., Eastman, J. D., Gal-Yam, A., Gorbikov, E., Higgins, D., Janczak, J., Kaspi, S., Lee, C. -U., Mallia, F., Maury, A., Monard, L. A. G., Moorhouse, D., Morgan, N., Natusch, T., Ofek, E. O., Park, B. -G., Pogge, R. W., Polishook, D., Santallo, R., Shporer, A., Spector, O., Thornley, G., Yee, J. C., Bozza, V., Browne, P., Dominik, M., Dreizler, S., Finet, F., Glitrup, M., Grundahl, F., Harpsoe, K., Hessman, F. V., Hinse, T. C., Hundertmark, M., Jorgensen, U. G., Liebig, C., Maier, G., Mancini, L., Mathiasen, M., Rahvar, S., Ricci, D., Scarpetta, G., Southworth, J., Surdej, J., Zimmer, F., Allan, A., Bramich, D. M., Snodgrass, C., Steele, I. A. and Street, R. A. (2011) MOA-2009-BLG-387Lb: A massive planet orbiting an M dwarf. Astronomy and Astrophysics, 529 1-16. doi:10.1051/0004-6361/201016111

Author Batista, V.
Gould, A.
Dieters, S.
Dong, S.
Bond, I.
Beaulieu, J. P.
Maoz, D.
Monard, B.
Christie, G. W.
McCormick, J.
Albrow, M. D.
Horne, K.
Tsapras, Y.
Burgdorf, M. J.
Novati, S. Calchi
Skottfelt, J.
Caldwell, J.
Kozlowski, S.
Kubas, D.
Gaudi, B. S.
Han, C.
Bennett, D. P.
An, J.
Abe, F.
Botzler, C. S.
Douchin, D.
Freeman, M.
Fukui, A.
Furusawa, K.
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.
Miyake, N.
Muraki, Y.
Nagaya, M.
Nishimoto, K.
Ohnishi, K.
Okumura, T.
Perrott, Y. C.
Rattenbury, N.
Saito, To.
Sullivan, D. J.
Sumi, T.
Sweatman, W. L.
Tristram, P. J.
Von Seggern, E.
Yock, P. C. M.
Brillant, S.
Calitz, J. J.
Cassan, A.
Cole, A.
Cook, K.
Coutures, C.
Prester, D. Dominis
Donatowicz, J.
Greenhill, J.
Hoffman, M.
Jablonski, F.
Kane, S. R.
Kains, N.
Marquette, J. -B.
Martin, R.
Martioli, E.
Meintjes, P.
Menzies, J.
Pedretti, E.
Pollard, K.
Sahu, K. C.
Vinter, C.
Wambsganss, J.
Watson, R.
Williams, A.
Zub, M.
Allen, W.
Bolt, G.
Bos, M.
Depoy, D. L.
Drummond, J.
Eastman, J. D.
Gal-Yam, A.
Gorbikov, E.
Higgins, D.
Janczak, J.
Kaspi, S.
Lee, C. -U.
Mallia, F.
Maury, A.
Monard, L. A. G.
Moorhouse, D.
Morgan, N.
Natusch, T.
Ofek, E. O.
Park, B. -G.
Pogge, R. W.
Polishook, D.
Santallo, R.
Shporer, A.
Spector, O.
Thornley, G.
Yee, J. C.
Bozza, V.
Browne, P.
Dominik, M.
Dreizler, S.
Finet, F.
Glitrup, M.
Grundahl, F.
Harpsoe, K.
Hessman, F. V.
Hinse, T. C.
Hundertmark, M.
Jorgensen, U. G.
Liebig, C.
Maier, G.
Mancini, L.
Mathiasen, M.
Rahvar, S.
Ricci, D.
Scarpetta, G.
Southworth, J.
Surdej, J.
Zimmer, F.
Allan, A.
Bramich, D. M.
Snodgrass, C.
Steele, I. A.
Street, R. A.
Title MOA-2009-BLG-387Lb: A massive planet orbiting an M dwarf
Journal name Astronomy and Astrophysics   Check publisher's open access policy
ISSN 0004-6361
Publication date 2011-05
Sub-type Article (original research)
DOI 10.1051/0004-6361/201016111
Open Access Status DOI
Volume 529
Start page 1
End page 16
Total pages 16
Place of publication Les Ulis, France
Publisher E D P Sciences
Language eng
Formatted abstract
Aims:  We report the discovery of a planet with a high planet-to-star mass ratio in the microlensing event MOA-2009-BLG-387, which exhibited pronounced deviations over a 12-day interval, one of the longest for any planetary event. The host is an M dwarf, with a mass in the range 0.07 M < Mhost < 0.49 M at 90% confidence. The planet-star mass ratio q = 0.0132 ± 0.003 has been measured extremely well, so at the best-estimated host mass, the planet mass is mp = 2.6 Jupiter masses for the median host mass, M = 0.19 M.

Methods:  The host mass is determined from two “higher order” microlensing parameters. One of these, the angular Einstein radius θE = 0.31 ± 0.03 mas has been accurately measured, but the other (the microlens parallax πE, which is due to the Earth’s orbital motion) is highly degenerate with the orbital motion of the planet. We statistically resolve the degeneracy between Earth and planet orbital effects by imposing priors from a Galactic model that specifies the positions and velocities of lenses and sources and a Kepler model of orbits.

Results:  The 90% confidence intervals for the distance, semi-major axis, and period of the planet are 3.5 kpc < DL < 7.9 kpc, 1.1 AU < a < 2.7 AU, and 3.8 yr < P < 7.6 yr, respectively.
Keyword Gravitational lensing: micro
Methods: data analysis
Planets and satellites: detection
methods: Numerical
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Non-UQ
Additional Notes Article #A102.

Document type: Journal Article
Sub-type: Article (original research)
Collection: School of Mathematics and Physics
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