Mass Measurements of Isolated Objects from Space-Based Microlensing
- Zhu (祝伟), Wei
- Novati, S. Calchi
- Gould, A.
- Udalski, A.
- Han, C.
- Shvartzvald, Y.
- Ranc, C.
- Jørgensen, U. G.
- Poleski, R.
- Bozza, V.
- Beichman, C.
- Bryden, G.
- Carey, S.
- Gaudi, B. S.
- Henderson, C. B.
- Pogge, R. W.
- Porritt, I.
- Wibking, B.
- Yee, J. C.
- Pawlak, M.
- Szymański, M. K.
- Skowron, J.
- Mróz, P.
- Kozłowski, S.
- Wyrzykowski, Ł.
- Pietrukowicz, P.
- Pietrzyński, G.
- Soszyński, I.
- Ulaczyk, K.
- 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.
- Friedmann, M.
- Kaspi, S.
- Maoz, D.
- Hundertmark, M.
- Street, R. A.
- Tsapras, Y.
- Bramich, D. M.
- Cassan, A.
- Dominik, M.
- Bachelet, E.
- Dong, Subo
- Jaimes, R. Figuera
- Horne, K.
- Mao, S.
- Menzies, J.
- Schmidt, R.
- Snodgrass, Colin
- Steele, I. A.
- Wambsganss, J.
- Skottfelt, Jesper
- Andersen, M. I.
- Burgdorf, M. J.
- Ciceri, S.
- D’Ago, G.
- Evans, D. F.
- Gu, S.-H.
- Hinse, T. C.
- Kerins, E.
- Korhonen, H.
- Kuffmeier, M.
- Mancini, L.
- Peixinho, N.
- Popovas, A.
- Rabus, M.
- Rahvar, S.
- Tronsgaard, R.
- Scarpetta, G.
- Southworth, J.
- Surdej, J.
- Essen, C. von
- Wang, Y.-B.
- Wertz, O.
Publication date
January 2016
DOI Publisher
American Astronomical Society Language
EnglishAbstract
We report on the mass and distance measurements of two single-lens events from the 2015 Spitzer microlensing campaign. With both finite-source effect and microlens parallax measurements, we find that the lens of OGLE-2015-BLG-1268 is very likely a brown dwarf (BD). Assuming that the source star lies behind the same amount of dust as the Bulge red clump, we find the lens is a 45 ± 7 MJ BD at 5.9 ± 1.0 kpc. The lens of of the second event, OGLE-2015-BLG-0763, is a 0.50 ± 0.04 M⊙ star at 6.9 ± 1.0 kpc. We show that the probability to definitively measure the mass of isolated microlenses is dramatically increased once simultaneous ground- and space-based observations are conducted
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