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

Authors :
Bozza, V.
Shvartzvald, Y.
Udalski, A.
Novati, S. Calchi
Bond, I. A.
Han, C.
Hundertmark, M.
Poleski, R.
Pawlak, M.
Szymański, M. K.
Skowron, J.
Mróz, P.
Kozłowski, S.
Wyrzykowski, Ł.
Pietrukowicz, P.
Soszyński, I.
Ulaczyk, K.
Beichman, C.
Bryden, G.
Carey, S.
Fausnaugh, M.
Gaudi, B. S.
Gould, A.
Henderson, C. B.
Pogge, R. W.
Wibking, B.
Yee, J. C.
Zhu, W.
Abe, F.
Asakura, Y.
Barry, R. K.
Bennett, D. P.
Bhattacharya, A.
Donachie, M.
Freeman, M.
Fukui, A.
Hirao, Y.
Inayama, K.
Itow, Y.
Koshimoto, N.
Li, M. C. A.
Ling, C. H.
Masuda, K.
Matsubara, Y.
Muraki, Y.
Nagakane, M.
Nishioka, T.
Ohnishi, K.
Oyokawa, H.
Rattenbury, N.
Saito, T.
Sharan, A.
Sullivan, D. J.
Sumi, T.
Suzuki, D.
Tristram, P. J.
Wakiyama, Y.
Yonehara, A.
Choi, J. -Y.
Park, H.
Jung, Y. K.
Shin, I. -G.
Albrow, M. D.
Park, B. -G.
Kim, S. -L.
Lee, C. -U.
Cha, S. -M.
Kim, D. -J.
Lee, Y.
Dominik, M.
Jørgensen, U. G.
Andersen, M. I.
Bramich, D. M.
Burgdorf, M. J.
Ciceri, S.
D'Ago, G.
Evans, D. F.
Jaimes, R. Figuera
Gu, S. -H.
Hinse, T. C.
Kains, N.
Kerins, E.
Korhonen, H.
Kuffmeier, M.
Mancini, L.
Popovas, A.
Rabus, M.
Rahvar, S.
Rasmussen, R. T.
Scarpetta, G.
Skottfelt, J.
Snodgrass, C.
Southworth, J.
Surdej, J.
Unda-Sanzana, E.
von Essen, C.
Wang, Y. -B.
Wertz, O.
Maoz, D.
Friedmann, M.
Kaspi, S.
Publication Year :
2016

Abstract

Spitzer microlensing parallax observations of OGLE-2015-BLG-1212 decisively breaks 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.<br />Comment: 27 pages, 6 figures, accepted by ApJ

Subjects

Subjects :
Astrophysics - Earth and Planetary Astrophysics

Details

Database :
arXiv
Publication Type :
Report
Accession number :
edsarx.1601.01699
Document Type :
Working Paper
Full Text :
https://doi.org/10.3847/0004-637X/820/1/79
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