Furusawa, K, Udalski, A, Sumi, T, Bennett, DP, Bond, IA, Gould, A, Jorgensen, UG, Snodgrass, C, Prester, DD, Albrow, MD, Abe, F, Botzler, CS, Chote, P, Freeman, M, Fukui, A, Harris, P, Itow, Y, Ling, CH, Masuda, K, Matsubara, Y, Miyake, N, Muraki, Y, Ohnishi, K, Rattenbury, NJ, Saito, T, Sullivan, DJ, Suzuki, D, Sweatman, WL, Tristram, PJ, Wada, K, Yock, PCM, Szymanski, MK, Soszynski, I, Kubiak, M, Poleski, R, Ulaczyk, K, Pietrzynski, G, Wyrzykowski, L, Choi, J-Y, Christie, GW, Depoy, DL, Dong, S, Drummond, J, Gaudi, BS, Han, C, Hung, L-W, Hwang, K-H, Lee, C-U, McCormick, J, Moorhouse, D, Natusch, T, Nola, M, Ofek, E, Pogge, RW, Shin, I-G, Skowron, J, Thornley, G, Yee, JC, Alsubai, KA, Bozza, V, Browne, P, Burgdorf, MJ, Novati, SC, Dodds, P, Dominik, M, Finet, F, Gerner, T, Hardis, S, Harpsoe, K, Hinse, TC, Hundertmark, M, Kains, N, Kerins, E, Liebig, C, Mancini, L, Mathiasen, M, Penny, MT, Proft, S, Rahvar, S, Ricci, D, Scarpetta, G, Schafer, S, Schonebeck, F, Southworth, J, Surdej, J, Wambsganss, J, Street, RA, Bramich, DM, Steele, IA, Tsapras, Y, Horne, K, Donatowicz, J, Sahu, KC, Bachelet, E, Batista, V, Beatty, TG, Beaulieu, J-P, Bennett, CS, Black, C, Bowens-Rubin, R, Brillant, S, Caldwell, JAR, Cassan, A, Cole, AA, Corrales, E, Coutures, C, Dieters, S, Fouque, P, Greenhill, J, Henderson, CB, Kubas, D, Marquette, J-B, Martin, R, Menzies, JW, Shappee, B, Williams, A, Wouters, D, Van Saders, J, Zellem, R, Zub, M, Collaboration, O, Collaboration, FUN, Consortium, M, Collaboration, R, Collaboration, P and Collaboration, TMOA (2013) MOA-2010-BLG-328Lb: A SUB-NEPTUNE ORBITING VERY LATE M DWARF? Astrophysical Journal, 779 (2). ISSN 0004-637X

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Abstract

We analyze the planetary microlensing event MOA-2010-BLG-328. The best fit yields host and planetary masses of M h = 0.11 ± 0.01 M ☉ and M p = 9.2 ± 2.2 M ⊕, corresponding to a very late M dwarf and sub-Neptune-mass planet, respectively. The system lies at D L = 0.81 ± 0.10 kpc with projected separation r ⊥ = 0.92 ± 0.16 AU. Because of the host's a priori unlikely close distance, as well as the unusual nature of the system, we consider the possibility that the microlens parallax signal, which determines the host mass and distance, is actually due to xallarap (source orbital motion) that is being misinterpreted as parallax. We show a result that favors the parallax solution, even given its close host distance. We show that future high-resolution astrometric measurements could decisively resolve the remaining ambiguity of these solutions.

Item Type: Article
Additional Information: © IOP Science. This is the final published version of the article (version of record). It first appeared online via IOP Science at http://iopscience.iop.org/article/10.1088/0004-637X/779/2/91/meta. Please refer to any applicable terms of use of the publisher.
Uncontrolled Keywords: gravitational lensing, micro, planetary systems
Subjects: Q Science > QB Astronomy > QB460 Astrophysics
Divisions: Faculty of Natural Sciences > School of Chemical and Physical Sciences
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Depositing User: Symplectic
Date Deposited: 02 Jul 2018 09:27
Last Modified: 02 Jul 2018 09:27
URI: http://eprints.keele.ac.uk/id/eprint/5080

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