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MOA-2010-BLG-328Lb: A SUB-NEPTUNE ORBITING VERY LATE M DWARF?

Furusawa, K.; Udalski, A.; Sumi, T.; Bennett, D.P.; Bond, I.A.; Gould, A.; Jørgensen, U.G.; Snodgrass, C.; Dominis Prester, D.; Albrow, M.D.; Abe, F.; Botzler, C.S.; Chote, P.; Freeman, M.; Fukui, A.; Harris, P.; Itow, Y.; Ling, C.H.; Masuda, K.; Matsubara, Y.; Miyake, N.; Muraki, Y.; Ohnishi, K.; Rattenbury, N.J.; To. Saito; Sullivan, D.J.; Suzuki, D.; Sweatman, W.L.; Tristram, P.J.; Wada, K.; Yock, P.C.M.; MOA Collaboration, The; Szymański, M.K.; Soszyński, I.; Kubiak, M.; Poleski, R.; Ulaczyk, K.; Pietrzyński, G.; Wyrzykowski, Ł.; OGLE Collaboration, The; Choi, J.-Y.; Christie, G.W.; DePoy, D.L.; Dong, Subo; Drummond, J.; Gaudi, B.S.; Han, C.; Hung, L.-W.; Hwang, K.-H.; Lee, C.-U.; McCormick, J.; Moorhouse, D.; Natusch, T.; Nola, M.; Ofek, E.; Pogge, R.W.; Shin, I.-G.; Skowron, J.; ThornleY, G.; Yee, J.C.; Collaboration, The μFUN; Alsubai, K.A.; Bozza, V.; Browne, P.; Burgdorf, M.J.; Calchi Novati, S.; Dodds, P.; Dominik, M.; Finet, F.; Gerner, T.; Hardis, S.; Harpsøe, K.; Hinse, T....

MOA-2010-BLG-328Lb: A SUB-NEPTUNE ORBITING VERY LATE M DWARF? Thumbnail


Authors

K. Furusawa

A. Udalski

T. Sumi

D.P. Bennett

I.A. Bond

A. Gould

U.G. Jørgensen

C. Snodgrass

D. Dominis Prester

M.D. Albrow

F. Abe

C.S. Botzler

P. Chote

M. Freeman

A. Fukui

P. Harris

Y. Itow

C.H. Ling

K. Masuda

Y. Matsubara

N. Miyake

Y. Muraki

K. Ohnishi

N.J. Rattenbury

To. Saito

D.J. Sullivan

D. Suzuki

W.L. Sweatman

P.J. Tristram

K. Wada

P.C.M. Yock

The MOA Collaboration

M.K. Szymański

I. Soszyński

M. Kubiak

R. Poleski

K. Ulaczyk

G. Pietrzyński

Ł. Wyrzykowski

The OGLE Collaboration

J.-Y. Choi

G.W. Christie

D.L. DePoy

Subo Dong

J. Drummond

B.S. Gaudi

C. Han

L.-W. Hung

K.-H. Hwang

C.-U. Lee

J. McCormick

D. Moorhouse

T. Natusch

M. Nola

E. Ofek

R.W. Pogge

I.-G. Shin

J. Skowron

G. ThornleY

J.C. Yee

The μFUN Collaboration

K.A. Alsubai

V. Bozza

P. Browne

M.J. Burgdorf

S. Calchi Novati

P. Dodds

M. Dominik

F. Finet

T. Gerner

S. Hardis

K. Harpsøe

T.C. Hinse

M. Hundertmark

N. Kains

E. Kerins

C. Liebig

L. Mancini

M. Mathiasen

M.T. Penny

S. Proft

S. Rahvar

D. Ricci

G. Scarpetta

S. Schäfer

F. Schönebeck

J. Surdej

J. Wambsganss

The MiNDSTEp Consortium

R.A. Street

D.M. Bramich

I.A. Steele

Y. Tsapras

The RoboNet Collaboration

K. Horne

J. Donatowicz

K.C. Sahu

E. Bachelet

V. Batista

T.G. Beatty

J.-P. Beaulieu

C.S. Bennett

C. Black

R. Bowens-Rubin

S. Brillant

J.A.R. Caldwell

A. Cassan

A.A. Cole

E. Corrales

C. Coutures

S. Dieters

P. Fouqué

J. Greenhill

C.B. Henderson

D. Kubas

J.-B. Marquette

R. Martin

J.W. Menzies

B. Shappee

A. Williams

D. Wouters

J. van Saders

R. Zellem

M. Zub

The PLANET Collaboration



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.

Journal Article Type Article
Acceptance Date Sep 27, 2013
Online Publication Date Nov 26, 2013
Publication Date Dec 20, 2013
Publicly Available Date Mar 28, 2024
Journal Astrophysical Journal
Print ISSN 0004-637X
Publisher American Astronomical Society
Peer Reviewed Peer Reviewed
Volume 779
Issue 2
Article Number 91
DOI https://doi.org/10.1088/0004-637X/779/2/91
Keywords gravitational lensing, micro, planetary systems
Publisher URL http://iopscience.iop.org/article/10.1088/0004-637X/779/2/91/meta

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