NASA NTRS · 20190025307
OGLE-2016-BLG-1469L: Microlensing Binary Composed of Brown Dwarfs
Abstract
We report the discovery of a binary composed of two brown dwarfs, based on the analysis of the micro lensing event OGLE-2016-BLG-1469. Thanks to the detection of both finite-source and micro lens-parallax effects, we are able to measure both the masses M(sub 1) ~ 0.05 Solar Mass and M(sub 2) ~ 0.01 Solar Mass, and the distance D(sub L) ~ 4.5 kpc, as well as the projected separation a(sub perpendicular) ~ 0.33 au. This is the third brown-dwarf binary detected using the micro lensing method, demonstrating the usefulness of micro lensing in detecting field brown-dwarf binaries with separations of less than 1 au.
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Han, C., Udalski, A., Sumi, T., Gould, A., Albrow, M. D., Chung, S.-J., Jung, Y. K., Ryu, Y.-H., Shin, I.-G., Yee, J. C., Zhu, W., Cha, S.-M., Kim, S.-L., Kim, D.-J., Lee, C.-U., Lee, Y., Park, B.-G., Soszyński, I., Mróz, P., Pietrukowicz, P., Szymański, M. K., Skowron, J., Poleski, R., Kozłowski, S., Ulaczyk, K., Pawlak, M., Abe, F., Asakura, Y., Bennett, D. P., Bond, I. A., Bhattacharya, A., Donachie, M., Freeman, M., Fukui, A., Hirao, Y., Itow, Y., Koshimoto, N., Li, M. C. A., Ling, C. H., Masuda, K., Matsubara, Y., Muraki, Y., Nagakane, M., Ohnishi, K., Oyokawa, H., Rattenbury, N. J., Saito, To., Sharan, A., Sullivan, D. J., Suzuki, D., Tristram, P. J., Yamada, T., Yonehara, A., Barry, R.. 2017-07-03. OGLE-2016-BLG-1469L: Microlensing Binary Composed of Brown Dwarfs. https://ntrs.nasa.gov/citations/20190025307
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