CaltechAUTHORS
  A Caltech Library Service

Spitzer Observations of OGLE-2015-BLG-1212 Reveal a New Path toward Breaking Strong Microlens Degeneracies

Bozza, V. and Calchi Novati, S. and Beichman, C. and Carey, S. (2016) Spitzer Observations of OGLE-2015-BLG-1212 Reveal a New Path toward Breaking Strong Microlens Degeneracies. Astrophysical Journal, 820 (1). Art. No. 79. ISSN 0004-637X. https://resolver.caltech.edu/CaltechAUTHORS:20160426-144906027

[img] PDF - Published Version
See Usage Policy.

761Kb
[img] PDF - Submitted Version
See Usage Policy.

754Kb

Use this Persistent URL to link to this item: https://resolver.caltech.edu/CaltechAUTHORS:20160426-144906027

Abstract

Spitzer microlensing parallax observations of OGLE-2015-BLG-1212 decisively break a degeneracy between planetary and binary solutions that is somewhat ambiguous when only ground-based data are considered. Only eight viable models survive out of an initial set of 32 local minima in the parameter space. These models clearly indicate that the lens is a stellar binary system possibly located within the bulge of our Galaxy, ruling out the planetary alternative. We argue that several types of discrete degeneracies can be broken via such space-based parallax observations.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.3847/0004-637X/820/1/79DOIArticle
http://iopscience.iop.org/article/10.3847/0004-637X/820/1/79/metaPublisherArticle
http://arxiv.org/abs/1601.01699arXivDiscussion Paper
ORCID:
AuthorORCID
Bozza, V.0000-0003-4590-0136
Calchi Novati, S.0000-0002-7669-1069
Beichman, C.0000-0002-5627-5471
Carey, S.0000-0002-0221-6871
Alternate Title:Spitzer Observations of OGLE-2015-BLG-1212 Reveal a New Path to Breaking Strong Microlens Degeneracies
Additional Information:© 2016 The American Astronomical Society. Received 2016 January 8; accepted 2016 February 9; published 2016 March 21. The OGLE Team thanks Profs. M. Kubiak and G. Pietrzyński, former members of the OGLE team, for their contribution to the collection of the OGLE photometric data over the past years. The OGLE project has received funding from the National Science Centre, Poland, grant MAESTRO 2014/14/A/ST9/00121 to A.U. Work by Y.S. and C.B.H. was supported by an appointment to the NASA Postdoctoral Program at the Jet Propulsion Laboratory, administered by Oak Ridge Associated Universities through a contract with NASA. Work by C.H. was supported by Creative Research Initiative Program (2009-0081561) of National Research Foundation of Korea. J.C.Y., A.G., and S.C.N. acknowledge support by JPL grant 1500811. Work by W.Z. and A.G. was supported by NSF AST 1516842. Work by J.C.Y. was performed under contract with the California Institute of Technology (Caltech)/Jet Propulsion Laboratory (JPL) funded by NASA through the Sagan Fellowship Program executed by the NASA Exoplanet Science Institute. T.S. acknowledges the financial support from the JSPS, JSPS23103002, JSPS24253004, and JSPS26247023. The MOA project is supported by grants JSPS25103508 and JSPS23340064. Based on data collected by MiNDSTEp with the Danish 1.54 m telescope at the ESO La Silla Observatory.
Group:Infrared Processing and Analysis Center (IPAC)
Funders:
Funding AgencyGrant Number
National Science Centre (Poland)MAESTRO 2014/14/A/ST9/00121
NASA Postdoctoral ProgramUNSPECIFIED
National Research Foundation of Korea2009-0081561
JPL1500811
NSFAST 1516842
NASA/JPL/CaltechUNSPECIFIED
NASA Sagan FellowshipUNSPECIFIED
Royal SocietyUNSPECIFIED
Japan Society for the Promotion of Science (JSPS)JSPS23103002
Japan Society for the Promotion of Science (JSPS)JSPS24253004
Japan Society for the Promotion of Science (JSPS)JSPS26247023
Japan Society for the Promotion of Science (JSPS)JSPS25103508
Japan Society for the Promotion of Science (JSPS)JSPS23340064
Subject Keywords:binaries: general; Galaxy: bulge; gravitational lensing: micro; planets and satellites: detection; space vehicles
Issue or Number:1
Record Number:CaltechAUTHORS:20160426-144906027
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20160426-144906027
Official Citation:V. Bozza et al 2016 ApJ 820 79
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:66489
Collection:CaltechAUTHORS
Deposited By: Ruth Sustaita
Deposited On:26 Apr 2016 22:35
Last Modified:09 Mar 2020 13:18

Repository Staff Only: item control page