2015ApJ...805....8Z

Query : 2015ApJ...805....8Z

2015ApJ...805....8Z - Astrophys. J., 805, 8 (2015/May-3)

Spitzer as a microlens parallax satellite: mass and distance measurements of the binary lens system OGLE-2014-BLG-1050L.

ZHU W., UDALSKI A., GOULD A., DOMINIK M., BOZZA V., HAN C., YEE J.C., CALCHI NOVATI S., BEICHMAN C.A., CAREY S., POLESKI R., SKOWRON J., KOZLOWSKI S., MROZ P., PIETRUKOWICZ P., PIETRZYNSKI G., SZYMANSKI M.K., SOSZYNSKI I., ULACZYK K., WYRZYKOWSKI L. (The OGLE Collaboration), GAUDI B.S., POGGE R.W., DEPOY D.L., JUNG Y.K., CHOI J.-Y., HWANG K.-H., SHIN I.-G., PARK H., JEONG J. (The {mu}FUN Collaboration)

Abstract (from CDS):

We report the first mass and distance measurements of a caustic-crossing binary system OGLE-2014-BLG-1050 L using the space-based microlens parallax method. Spitzer captured the second caustic crossing of the event, which occurred ∼10 days before that seen from Earth. Due to the coincidence that the source-lens relative motion was almost parallel to the direction of the binary-lens axis, the fourfold degeneracy, which was known before only to occur in single-lens events, persists in this case, leading to either a lower-mass (0.2 and 0.07) binary at ∼1.1 kpc or a higher-mass (0.9 and 0.35) binary at ∼3.5 kpc. However, the latter solution is strongly preferred for reasons including blending and lensing probability. OGLE-2014-BLG-1050 L demonstrates the power of microlens parallax in probing stellar and substellar binaries.

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

Simbad objects: 6

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Number of rows : 6
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-2014-BLG-1050 BD? 17 45 07.83 -22 54 20.0           ~ 8 0
2 NAME Galactic Center reg 17 45 39.60213 -29 00 22.0000           ~ 16269 0
3 NAME EWS 2011-BLG-420b Pl 17 50 56.1715170240 -29 49 30.216419616           ~ 5 1
4 MOA 2009-BLG-232 * 17 54 22.3539093816 -29 03 21.146804712           ~ 13 1
5 MOA 2014-BLG-307 BD? 18 02 29.2002 -28 23 46.549           ~ 28 0
6 NAME Galactic Bulge reg ~ ~           ~ 4794 0

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