OGLE-2016-BLG-1469L: Microlensing Binary Composed of Brown Dwarfs

We report the discovery of a binary composed of two brown dwarfs, based on the analysis of the microlensing event OGLE-2016-BLG-1469. Thanks to the detection of both finite-source and microlens-parallax effects, we are able to measure both the masses and , and the distance , as well as the projected...

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Veröffentlicht in:	The Astrophysical journal 2017-07, Vol.843 (1), p.59
Hauptverfasser:	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., Soszy ski, I., Mróz, P., Pietrukowicz, P., Szyma ski, M. K., Skowron, J., Poleski, R., Koz owski, 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.
Format:	Artikel
Sprache:	eng
Schlagworte:	Astrophysics ASTROPHYSICS, COSMOLOGY AND ASTRONOMY binaries: general BINARY STARS Brown dwarf stars brown dwarfs DETECTION DISTANCE DWARF STARS GRAVITATIONAL LENSES gravitational lensing: micro MASS Microlenses Parallax
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Beschreibung
Zusammenfassung:	We report the discovery of a binary composed of two brown dwarfs, based on the analysis of the microlensing event OGLE-2016-BLG-1469. Thanks to the detection of both finite-source and microlens-parallax effects, we are able to measure both the masses and , and the distance , as well as the projected separation au. This is the third brown-dwarf binary detected using the microlensing method, demonstrating the usefulness of microlensing in detecting field brown-dwarf binaries with separations of less than 1 au.
ISSN:	0004-637X 1538-4357
DOI:	10.3847/1538-4357/aa740e