2017A&A...604A.103P

Query : 2017A&A...604A.103P

2017A&A...604A.103P - Astronomy and Astrophysics, volume 604A, 103-103 (2017/8-1)

A companion on the planet/brown dwarf mass boundary on a wide orbit discovered by gravitational microlensing.

POLESKI R., UDALSKI A., BOND I.A., BEAULIEU J.P., CLANTON C., GAUDI S., SZYMANSKI M.K., SOSZYNSKI I., PIETRUKOWICZ P., KOZLOWSKI S., SKOWRON J., WYRZYKOWSKI L., ULACZYK K., BENNETT D.P., SUMI T., SUZUKI D., RATTENBURY N.J., KOSHIMOTO N., ABE F., ASAKURA Y., BARRY R.K., BHATTACHARYA A., DONACHIE M., EVANS P., FUKUI A., HIRAO Y., ITOW Y., LI M.C.A., LING C.H., MASUDA K., MATSUBARA Y., MURAKI Y., NAGAKANE M., OHNISHI K., RANC C., SAITO T., SHARAN A., SULLIVAN D.J., TRISTRAM P.J., YAMADA T., YAMADA T., YONEHARA A., BATISTA V. and MARQUETTE J.B.

Abstract (from CDS):

We present the discovery of a substellar companion to the primary host lens in the microlensing event MOA-2012-BLG-006. The companion-to-host mass ratio is 0.016, corresponding to a companion mass of ∼8MJup(M*/0.5M☉). Thus, the companion is either a high-mass giant planet or a low-mass brown dwarf, depending on the mass of the primary M*. The companion signal was separated from the peak of the primary event by a time that was as much as four times longer than the event timescale. We therefore infer a relatively large projected separation of the companion from its host of ∼10au(M*/0.5M☉)1/2 for a wide range (3-7kpc) of host star distances from the Earth. We also challenge a previous claim of a planetary companion to the lens star in microlensing event OGLE-2002-BLG-045.

Abstract Copyright: © ESO, 2017

Journal keyword(s): gravitational lensing: micro - instrumentation: high angular resolution - planetary systems - brown dwarfs - brown dwarfs

Simbad objects: 14

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Number of rows : 14
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2024 		#notes
1 OGLE-2008-BLG-092 ** 17 47 29.4593818584 -34 43 35.461182180       15.48   ~ 39 0
2 MOA 2013-BLG-260 ** 17 52 07.49 -29 50 46.0           ~ 42 0
3 OGLE-2002-BUL-055 PN 17 59 40.93 -27 07 18.2           ~ 12 0
4 MOA 2012-BLG-6b Pl 18 01 46.31 -29 06 31.6           ~ 2 0
5 OGLE-2012-BLG-0022 * 18 01 46.31 -29 06 31.6           ~ 11 0
6 MOA 2011-BLG-322 * 18 04 53.630 -27 13 15.05           ~ 14 0
7 OGLE-2002-BLG-045 * 18 06 51.35 -29 16 43.5           ~ 3 0
8 MOA 2007-BLG-197 * 18 07 04.729 -31 56 46.77           ~ 9 0
9 MOA 2007-BLG-192 * 18 08 03.798 -27 09 00.27           ~ 46 1
10 MOA 2007-BLG-192b Pl 18 08 03.798 -27 09 00.27           ~ 32 1
11 MOA 2007-BLG-400 * 18 09 41.980 -29 13 26.95           ~ 44 1
12 MOA 2007-BLG-400b Pl 18 09 41.980 -29 13 26.95           ~ 35 1
13 MOA 2010-BLG-73 * 18 10 11.3890776312 -26 31 22.712788056           ~ 15 0
14 NAME Galactic Bulge reg ~ ~           ~ 4297 0

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