2019ApJ...871..179C

Query : 2019ApJ...871..179C

2019ApJ...871..179C - Astrophys. J., 871, 179-179 (2019/February-1)

Spitzer microlensing of MOA-2016-BLG-231L: a counter-rotating brown dwarf binary in the Galactic disk.

CHUNG S.-J., GOULD A., SKOWRON J., BOND I.A., ZHU W., ALBROW M.D., JUNG Y.K., HAN C., HWANG K.-H., RYU Y.-H., SHIN I.-G., SHVARTZVALD Y., YEE J.C., ZANG W., CHA S.-M., KIM D.-J., KIM H.-W., KIM S.-L., KIM Y.-H., LEE C.-U., LEE D.-J., LEE Y., PARK B.-G., POGGE R.W. (The KMTNet Collaboration), UDALSKI A., POLESKI R., MROZ P., PIETRUKOWICZ P., SZYMANSKI M.K., SOSZYNSKI I., KOZLOWSKI S., ULACZYK K., PAWLAK M. (The OGLE Collaboration), BEICHMAN C.A., BRYDEN G., CALCHI NOVATI S., CAREY S., GAUDI B.S., HENDERSON C.B. (The Spitzer Team), ABE F., BARRY R., BENNETT D.P., BHATTACHARYA A., DONACHIE M., FUKUI A., HIRAO Y., ITOW Y., KAWASAKI K., KONDO I., KOSHIMOTO N., LI M.C.A., MATSUBARA Y., MURAKI Y., MIYAZAKI S., NAGAKANE M., RANC C., RATTENBURY N.J., SUEMATSU H., SULLIVAN D.J., SUMI T., SUZUKI D., TRISTRAM P.J., YONEHARA A. (The MOA Collaboration)

Abstract (from CDS):

We analyze the binary microlensing event MOA-2016-BLG-231, which was observed from the ground and from Spitzer. The lens is composed of very-low-mass brown dwarfs (BDs) with M1=21–5+12 MJ and M2=9–2+5 MJ, and it is located in the Galactic disk DL=2.85–0.50+0.88 kpc. This is the fifth binary brown dwarf discovered by microlensing, and the BD binary is moving counter to the orbital motion of disk stars. Constraints on the lens physical properties come from late-time, non-caustic-crossing features of the Spitzer light curve. Thus, MOA-2016-BLG-231 shows how Spitzer plays a crucial role in resolving the nature of BDs in binary BD events with short timescales (<=10 days).

Abstract Copyright: © 2019. The American Astronomical Society. All rights reserved.

Journal keyword(s): binaries: general - brown dwarfs - gravitational lensing: micro

Simbad objects: 21

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Number of rows : 21
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 OGLE-2017-BLG-0896 * 17 39 30.98 -27 17 51.1           ~ 11 0
2 OGLE-2012-BLG-0358 BD? 17 42 46.7641762656 -24 15 39.605456196           ~ 16 1
3 OGLE-2016-BLG-0693 * 17 49 55.29 -23 02 23.8           ~ 3 0
4 OGLE-2016-BLG-0168 * 17 50 49.89 -31 45 30.1           ~ 6 0
5 OGLE-2011-BLG-0420 * 17 50 56.1715170240 -29 49 30.216419616           ~ 11 1
6 OGLE-2016-BLG-1266 BD? 17 51 24.86 -29 44 32.1           ~ 7 0
7 OGLE-2013-BLG-0102 * 17 52 07.0810869490 -31 41 26.128240598           ~ 11 0
8 OGLE-2016-BLG-0864 * 17 53 12.00 -30 11 32.1           ~ 7 0
9 MOA 2009-BLG-232 * 17 54 22.3539093816 -29 03 21.146804712           ~ 13 1
10 MOA 2011-BLG-104 * 17 54 22.480 -29 50 01.67           ~ 13 0
11 MOA 2016-BLG-350 BD? 17 55 23.50 -30 12 26.1           ~ 41 0
12 MOA 2011-BLG-149 * 17 56 47.690 -31 16 04.71           ~ 6 0
13 OGLE-2015-BLG-1319 * 17 57 46.40 -32 28 19.9           ~ 9 0
14 OGLE-2013-BLG-0578 * 17 59 59.85 -29 44 06.9           ~ 5 0
15 OGLE-2006-BLG-277 * 18 01 14.84 -27 48 36.2           ~ 7 0
16 OGLE-2014-BLG-0257 BD? 18 01 47.79 -28 15 43.2           ~ 5 0
17 MOA 2007-BLG-197 * 18 07 04.729 -31 56 46.77           ~ 10 0
18 OGLE-2016-BLG-1469 BD? 18 07 46.98 -26 17 23.6           ~ 5 0
19 OGLE-2014-BLG-1112 * 18 08 36.31 -28 39 56.9           ~ 5 0
20 MOA 2010-BLG-73 * 18 10 11.3890776312 -26 31 22.712788056           ~ 16 0
21 NAME Galactic Bulge reg ~ ~           ~ 4794 0

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