MOA-2010-BLG-328Lb: a sub-Neptune orbiting very late M dwarf ?

{van Saders}, J.; {Furusawa}, K.; {Bennett}, D. P.; {Udalski}, A.; {Bond}, I. A.; {Sumi}, T.; {J{ø}rgensen}, U. G.; {Dominis Prester}, D.; {Albrow}, M. D.; {Gould}, A.; {Botzler}, C. S.; {Snodgrass}, C.; {Abe}, F.; {Ling}, C. H.; {Chote}, P.; {Freeman}, M.; {Fukui}, A.; {Rattenbury}, N. J.; {Harris}, P.; {Sullivan}, D. J.; {Itow}, Y.; {Sweatman}, W. L.; {Tristram}, P. J.; {Masuda}, K.; {Yock}, P. C. M.; {Matsubara}, Y.; {Szyma{ń}ski}, M. K.; {Miyake}, N.; {Muraki}, Y.; {Ohnishi}, K.; {Saito}, T.; {Choi}, J.-Y.; {Christie}, G. W.; {DePoy}, D. L.; {Suzuki}, D.; {Gaudi}, B. S.; {Hung}, L.-W.; {Wada}, K.; {Hwang}, K.-H.; {Lee}, C.-U.; {Soszy{ń}ski}, I.; {Kubiak}, M.; {Pogge}, R. W.; {Poleski}, R.; {Shin}, I.-G.; {Ulaczyk}, K.; {Pietrzy{ń}ski}, G.; {Yee}, J. C.; {Alsubai}, K. A.; {Wyrzykowski}, {Ł}; {Bozza,; {Burgdorf}, M. J.; {Calchi Novati}, S.; {Dong}, S.; {Drummond}, J.; {Hinse}, T. C.; {Han}, C.; {McCormick}, J.; {Penny}, M. T.; {Moorhouse}, D.; {Natusch}, T.; {Nola}, M.; {Ofek}, E.; {MiNDSTEp Consortium}, T.; {Skowron}, J.; {Street}, R. A.; {Thornley}, G.; {Bramich}, D. M.; {Steele}, I. A.; {Sahu}, K. C.; {Browne}, P.; {Batista,; {Beatty}, T. G.; {Beaulieu}, J.-P.; {Bennett}, C. S.; {Dodds}, P.; {Dominik}, M.; {Caldwell}, J. A. R.; {Finet}, F.; {Gerner}, T.; {Cole}, A. A.; {Hardis}, S.; {Harps{ø}e}, K.; {Hundertmark}, M.; {Henderson}, C. B.; {Kains}, N.; {Marquette}, J.-B.; {Kerins}, E.; {Menzies}, J. W.; {Liebig}, C.; {Mancini}, L.; {Mathiasen}, M.; {Proft}, S.; {Rahvar}, S.; {Ricci}, D.; {Scarpetta}, G.; {Schäfer}, S.; {Bozza}, V.; {Schönebeck}, F.; {Southworth}, J.; {Surdej}, J.; {Wambsganss}, J.; {Tsapras}, Y.; {Horne}, K.; {Donatowicz}, J.; {Bachelet}, E.; {Black}, C.; {Bowens-Rubin}, R.; {Brillant}, S.; {Cassan}, A.; {Corrales}, E.; {Coutures}, C.; {Dieters}, S.; {Fouqué}, P.; {Greenhill}, J.; {Kubas}, D.; {Martin}, R.; {Shappee}, B.; {Williams}, A.; {Wouters}, D.; {Zellem}, R.; {Zub}, M.; {Batista}, V.; Furusawa, K.; Udalski, A.; Sumi, T.; Bennett, D.~P P.; Bond, I.~A A.; Gould, A.; Jorgensen, U.~G G.; Snodgrass, C.; Albrow, M.~D D.; Abe, F.; Botzler, C.~S S.; Chote, P.; Freeman, M.; Fukui, A.; Harris, P.; Itow, Y.; Ling, C.~H H.; Wyrzykowski, Ł.; Masuda, K.; Matsubara, Y.; Miyake, N.; Muraki, Y.; Ohnishi, K.; Rattenbury, N.~J J.; Saito, To-O.; Sullivan, D.~J J.; Suzuki, D.; Sweatman, W.~L L.; Dominis Prester, D.; Tristram, P.~J J.; Wada, K.; Yock, P.~C.~M C. M.; Kubiak, M.; Szymanski, M. K.; Poleski, R.; Moa, Collaboration; Soszynski, I.; Ulaczyk, K.; Choi, J.-Y.; Christie, G.~W W.; Pietrzynski, G.; Depoy, D.~L L.; Dong, Subo; Collaboration, μFUN; Drummond, J.; Gaudi, B.~S S.; Ogle, Collaboration; Han, C.; Prester, D. Dominis; P {Bennett}, D.; Hung, L.-W.; Hwang, K.-H.; A {Bond}, I.; G {J{ø}rgensen}, U.; Lee, C.-U.; Prester}, D {Dominis; Mccormick, J.; D {Albrow}, M.; Moorhouse, D.; S {Botzler}, C.; H {Ling}, C.; Natusch, T.; J {Rattenbury}, N.; J {Sullivan}, D.; Nola, M.; L {Sweatman}, W.; J {Tristram}, P.; Ofek, E.; M {Yock}, P. C.; Pogge, R.~W W.; Shin, I.-G.; K {Szyma{ń}ski}, M.; Skowron, J.; Y {Choi}, J.; Thornley, G.; Yee, J.~C C.; W {Christie}, G.; Szyma\ŉski, M.~K; Alsubai, K.~A A.; Soszy\ŉski, I.; Bozza, V.; L {DePoy}, D.; Browne, P.; Burgdorf, M.~J J.; S {Gaudi}, B.; Dodds, P.; Pietrzy\ŉski, G.; Dominik, M.; W {Hung}, L.; Finet, F.; Gerner, T.; H {Hwang}, K.; Hardis, S.; U {Lee}, C.; Kerins, Eamonn; Harpsoe, K.; Calchi Novati, S.; Hinse, T.~C C.; Hundertmark, M.; Kains, Noé; W {Pogge}, R.; Liebig, C.; G {Shin}, I.; van Saders, J.; Mancini, L.; C {Yee}, J.; Mathiasen, M.; A {Alsubai}, K.; Penny, M.~T T.; Proft, S.; Rahvar, S.; J {Burgdorf}, M.; Ricci, Davide; Novati}, S {Calchi; Scarpetta, G.; Collaboration, \ensuremathμFUN; Schafer, S.; Schonebeck, F.; Southworth, J.; Collaboration, RoboNet; C {Hinse}, T.; Surdej, Jean; Wambsganss, J.; Novati, S. Calchi; Street, R.~A A.; Bramich, D.~M M.; T {Penny}, M.; Steele, I.~A A.; MiNDSTEp Consortium, The; Tsapras, Y.; Horne, K.; Donatowicz, J.; Sahu, K.~C C.; Consortium}, T {MiNDSTEp; Bachelet, E.; A {Street}, R.; Batista, V.; M {Bramich}, D.; Beatty, T.~G G.; Collaboration}, mu$}FUN; Beaulieu, J.-P.; A {Steele}, I.; Bennett, C.~S S.; Black, C.; Bowens-rubin, R.; Brillant, S.; C {Sahu}, K.; Caldwell, J.~A.~R A. R.; Cassan, A.; G {Beatty}, T.; Cole, A.~A A.; P {Beaulieu}, J.; Corrales, E.; Coutures, C.; S {Bennett}, C.; Dieters, S.; Fouque, P.; R {Caldwell}, J. A.; Greenhill, J.; Henderson, C.~B B.; A {Cole}, A.; Kubas, D.; Marquette, J.-B.; B {Henderson}, C.; Martin, R.; Saders, J.; Menzies, J.~W W.; B {Marquette}, J.; Shappee, B.; Wyrzykowski, L.; W {Menzies}, J.; Williams, A.; Park, B. G.; Wouters, D.; Jung, Y.-K.; Zellem, R.; Park, H.; Zub, M.; Collaboration, Planet

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American Astronomical Society, Astrophysical Journal, 2(779), p. 91, 2013

DOI: 10.1088/0004-637x/779/2/91

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MOA-2010-BLG-328Lb: a sub-Neptune orbiting very late M dwarf ?

Journal article published in 2013 by J. {van Saders}, K. {Furusawa}, D. P. {Bennett}, A. {Udalski}, I. A. {Bond}, T. {Sumi}, U. G. {J{ø}rgensen}, D. {Dominis Prester}, M. D. {Albrow}, A. {Gould}, C. S. {Botzler}, C. {Snodgrass}, F. {Abe}, C. H. {Ling}, P. {Chote} and other authors.

This paper is made freely available by the publisher.

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Abstract

We analyze the planetary microlensing event MOA-2010-BLG-328. The best fit yields host and planetary masses of Mh = 0.11+/-0.01 M_{sun} and Mp = 9.2+/-2.2M_Earth, corresponding to a very late M dwarf and sub-Neptune-mass planet, respectively. The system lies at DL = 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. ; Peer reviewed

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MOA-2010-BLG-328Lb: a sub-Neptune orbiting very late M dwarf ?

Abstract