2025Sci...388..400Z

Query : 2025Sci...388..400Z

2025Sci...388..400Z - Science, 388, 400-404 (2025/April-0)

Microlensing events indicate that super-Earth exoplanets are common in Jupiter-like orbits.

ZANG W., JUNG Y.K., YEE J.C., HWANG K.-H., YANG H., UDALSKI A., SUMI T., GOULD A., MAO S., ALBROW M.D., CHUNG S.-J., HAN C., RYU Y.-H., SHIN I.-G., SHVARTZVALD Y., 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., ZHANG X., KUANG R., WANG H., ZHANG J., HU Z., ZHU W., MROZ P., SKOWRON J., POLESKI R., SZYMANSKI M.K., SOSZYNSKI I., PIETRUKOWICZ P., KOZLOWSKI S., ULACZYK K., RYBICKI K.A., IWANEK P., WRONA M., GROMADZKI M., ABE F., BARRY R., BENNETT D.P., BHATTACHARYA A., BOND I.A., FUJII H., FUKUI A., HAMADA R., HIRAO Y., ISHITANI SILVA S., ITOW Y., KIRIKAWA R., KOSHIMOTO N., MATSUBARA Y., MIYAZAKI S., MURAKI Y., OLMSCHENK G., RANC C., RATTENBURY N.J., SATOH Y., SUZUKI D., TOMOYOSHI M., TRISTRAM P.J., VANDOROU A., YAMA H. and YAMASHITA K.

Abstract (from CDS):

Exoplanets classified as super-Earths are commonly observed on short-period orbits, close to their host stars, but their abundance on wider orbits is poorly constrained. Gravitational microlensing is sensitive to exoplanets on wide orbits. We observed the microlensing event OGLE-2016-BLG-0007, which indicates an exoplanet with a planet-to-star mass ratio roughly double the Earth-Sun mass ratio, on an orbit longer than Saturn's. We combined this event with a larger sample from a microlensing survey to determine the distribution of mass ratios for planets on wide orbits. We infer that there are ∼0.35 super-Earth planets per star on Jupiter-like orbits. The observations are most consistent with a bimodal distribution, with separate peaks for super-Earths and gas giants. We suggest that this reflects differences in their formation processes.

Abstract Copyright: © 2025 American Association for the Advancement of Science. All rights reserved. AAAS is a partner of HINARI, AGORA, OARE, CHORUS, CLOCKSS, CrossRef and COUNTER.

Journal keyword(s):

Simbad objects: 2

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Number of rows : 2
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-2016-BLG-0007 Lev 17 53 25.45 -29 38 32.1           ~ 6 0
2 NAME OGLE-2016-BLG-0007b Pl? 17 53 25.45 -29 38 32.1           ~ 3 0

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