2019ApJ...873...30S

Query : 2019ApJ...873...30S

2019ApJ...873...30S - Astrophys. J., 873, 30-30 (2019/March-1)

OGLE-2014-BLG-0962 and a comparison of Galactic model priors to microlensing data.

SHAN Y., YEE J.C., UDALSKI A., BOND I.A., SHVARTZVALD Y., SHIN I.-G., JUNG Y.-K., CALCHI NOVATI S., BEICHMAN C.A., CAREY S., GAUDI B.S., GOULD A., POGGE R.W. (The Spitzer Team), POLESKI R., SKOWRON J., KOZLOWSKI S., MROZ P., PIETRUKOWICZ P., SZYMANSKI M.K., SOSZYNSKI I., ULACZYK K., WYRZYKOWSKI L. (The OGLE Collaboration), ABE F., BARRY R.K., 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), MAOZ D., KASPI S., FRIEDMANN M. (The WISE Group)

Abstract (from CDS):

OGLE-2014-BLG-0962 (OB140962) is a stellar binary microlensing event that was well covered by observations from the Spitzer satellite as well as ground-based surveys. Modeling yields a unique physical solution: a mid-M+M-dwarf binary with Mprim = 0.20 ± 0.01 M☉ and Msec = 0.16 ± 0.01 M☉, with projected separation of 2.0 ± 0.3 au. The lens is only DLS = 0.41 ± 0.06 kpc in front of the source, making OB140962 a bulge lens and the most distant Spitzer binary lens to date. In contrast, because the Einstein radius (θE = 0.143 ± 0.007 mas) is unusually small, a standard Bayesian analysis, conducted in the absence of parallax information, would predict a brown dwarf binary. We compare the results of Bayesian analysis using two commonly used Galactic model priors to the measured values for a set of Spitzer lenses. We find all models tested predict lens properties consistent with the Spitzer data. Furthermore, we illustrate the methodology for probing the Galactic distribution of planets by comparing the cumulative distance distribution of the Spitzer two-body lenses to that of the Spitzer single lenses.

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

Journal keyword(s): binaries: general - Galaxy: bulge - gravitational lensing: micro - methods: statistical - stars: low-mass

Simbad objects: 19

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Number of rows : 19
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 BLG613.9 20182 * 17 32 23.41 -29 18 09.7           ~ 11 0
2 OGLE BLG609.25 33013 * 17 36 51.1949070168 -34 32 39.643428912           ~ 6 0
3 OGLE-2015-BLG-0479 * 17 43 40.55 -35 30 33.4           ~ 5 0
4 OGLE-2014-BLG-1050 BD? 17 45 07.83 -22 54 20.0           ~ 8 0
5 NAME Galactic Center reg 17 45 39.60213 -29 00 22.0000           ~ 16269 0
6 OGLE-2016-BLG-0168 * 17 50 49.89 -31 45 30.1           ~ 6 0
7 OGLE-2016-BLG-1266 BD? 17 51 24.86 -29 44 32.1           ~ 7 0
8 OGLE-2015-BLG-0020 * 17 53 49.81 -29 45 03.7           ~ 1 0
9 OGLE-2014-BLG-0289 * 17 53 51.66 -29 05 05.6           ~ 3 0
10 MOA 2015-BLG-281 BD? 17 55 01.020 -29 02 49.60           ~ 22 0
11 MOA 2016-BLG-350 BD? 17 55 23.50 -30 12 26.1           ~ 41 0
12 MOA 2011-BLG-293 * 17 55 39.350 -28 28 36.65           ~ 30 1
13 OGLE-2015-BLG-1268 BD? 17 56 49.77 -21 53 57.6           ~ 10 0
14 OGLE-2015-BLG-1319 * 17 57 46.40 -32 28 19.9           ~ 9 0
15 MOA 2016-BLG-383 * 17 58 52.30 -27 36 48.8           ~ 14 0
16 OGLE-2014-BLG-0962 * 18 01 42.950 -27 55 56.30           ~ 3 0
17 MOA 2014-BLG-307 BD? 18 02 29.2002 -28 23 46.549           ~ 28 0
18 OGLE-2005-BLG-169 * 18 06 05.32 -30 43 57.5     20.4     ~ 68 1
19 NAME Galactic Bulge reg ~ ~           ~ 4794 0

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