2018AJ....155..259H

Query : 2018AJ....155..259H

2018AJ....155..259H - Astron. J., 155, 259-259 (2018/June-0)

OGLE-2015-BLG-1459L: the challenges of exo-moon microlensing.

HWANG K.-H., UDALSKI A., BOND I.A., ALBROW M.D., CHUNG S.-J., GOULD A., HAN C., JUNG Y.K., RYU Y.-H., SHIN I.-G., YEE J.C., ZHU W., CHA S.-M., KIM D.-J., KIM H.-W., KIM S.-L., LEE C.-U., LEE D.-J., LEE Y., PARK B.-G., POGGE R.W. (The KMTNet Collaboration), PAWLAK M., POLESKI R., SZYMANSKI M.K., SKOWRON J., SOSZYNSKI I., MROZ P., KOZLOWSKI S., PIETRUKOWICZ P., ULACZYK K. (The OGLE Collaboration), ABE F., ASAKURA Y., BARRY R., BENNETT D.P., BHATTACHARYA A., DONACHIE M., EVANS P., FUKUI A., HIRAO Y., ITOW Y., KAWASAKI K., KOSHIMOTO N., LI M.C.A., LING C.H., MASUDA K., MATSUBARA Y., MIYAZAKI S., MURAKI Y., NAGAKANE M., OHNISHI K., RANC C., RATTENBURY N.J., SAITO T., SHARAN A., SULLIVAN D.J., SUMI T., SUZUKI D., TRISTRAM P.J., YAMADA T., YAMADA T., YONEHARA A. (The MOA Collaboration)

Abstract (from CDS):

We show that dense OGLE and KMTNet I-band survey data require four bodies (sources plus lenses) to explain the microlensing light curve of OGLE-2015-BLG-1459. However, these can equally well consist of three lenses and one source (3L1S), two lenses and two sources (2L2S), or one lens and three sources (1L3S). In the 3L1S and 2L2S interpretations, the host is a brown dwarf and the dominant companion is a Neptune-class planet, with the third body (in the 3L1S case) being a Mars-class object that could have been a moon of the planet. In the 1L3S solution, the light curve anomalies are explained by a tight (five stellar radii) low-luminosity binary source that is offset from the principal source of the event by ∼0.17au. These degeneracies are resolved in favor of the 1L3S solution by color effects derived from comparison to MOA data, which are taken in a slightly different (R/I) passband. To enable current and future (WFIRST) surveys to routinely characterize exo-moons and distinguish among such exotic systems requires an observing strategy that includes both a cadence faster than 9 minute–1 and observations in a second band on a similar timescale.

Abstract Copyright: © 2018. The American Astronomical Society. All rights reserved.

Journal keyword(s): gravitational lensing: micro - planetary systems

Simbad objects: 4

goto Full paper

goto View the references in ADS

Number of rows : 4
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-2015-BLG-1459 * 17 56 09.90 -29 49 26.3           ~ 12 0
2 MOA 2016-BLG-75 * 17 59 34.9386937392 -31 49 06.963389148           ~ 14 0
3 MOA 2007-BLG-192 * 18 08 03.798 -27 09 00.27           ~ 56 1
4 NAME Galactic Bulge reg ~ ~           ~ 4794 0

To bookmark this query, right click on this link: simbad:objects in 2018AJ....155..259H and select 'bookmark this link' or equivalent in the popup menu