2026AJ....171..151Y

Query : 2026AJ....171..151Y

2026AJ....171..151Y - Astron. J., 171, 151 (2026/March-0)

KMT-2025-BLG-1616Lb: First Microlensing Bound Planet From DREAMS.

YANG H., ZANG W., RYU Y.-H., SUMI T., ZHANG J., LI H., HAN C. (The Leading Authors), TANG Y., QIAN Q., LI Z., SHANG Y., SHAN X., MAO S., DAMKE G., ZENTENO A., HEATHCOTE S., BOUTSIA K., MROZ P., ZHAO X., PENNY M., TERRY S., TAMBURO P., CUNNINGHAM T., YE Q., PENG E.W., STREET R., KRUSZYNSKA K., BACHELET E., TSAPRAS Y., HUNDERTMARK M. (The DREAMS Collaboration), ALBROW M.D., CHUNG S.-J., GOULD A., HWANG K.-H., JUNG Y.K., SHIN I.-G., SHVARTZVALD Y., YEE J.C., KIM D.-J., LEE C.-U., PARK B.-G. (The KMTNet Collaboration), BENNETT D.P., BOND I.A., HAMADA R., HIRAO Y., IDEI A., MAKIDA S., MIYAZAKI S., NAGAI T., NAGANO T., NAKAYAMA S., NISHIO M., NUNOTA K., OGAWA R., OISHI R., OKUMOTO Y., RATTENBURY N.J., SATOH Y.K., SUZUKI D., TAMURA M., TAMAOKI T., YAMA H. (The PRIME Collaboration)

Abstract (from CDS):

We present observations and analysis of the bound planetary microlensing event KMT-2025-BLG-1616. The planetary signal was captured by the Korea Microlensing Telescope Network and the Dark Energy Camera Rogue Earths and Mars Survey (DREAMS). DREAMS's minute-cadence observations break the central/resonant degeneracy in the binary-lens models. The color of the faint source star (I = 22) is measured from the DREAMS's r - z color. The planetary system has a planet-host mass ratio of q ∼ 5 × 10–4. A Bayesian analysis yields a host-star mass of ∼0.3 M⊙, a planetary mass of ∼40 M⊕, a projected planet-host separation of ∼1.6 au, and a lens distance of ∼7.5 kpc. Based on the photometric precision achieved by DREAMS for this event, we simulate free-floating planet (FFP) detections and find that DREAMS is sensitive to Mars-mass FFPs in the Galactic bulge and Moon-mass FFPs in the Galactic disk.

Abstract Copyright: © 2026. The Author(s). Published by the American Astronomical Society.

Journal keyword(s): Exoplanet detection methods - Gravitational microlensing - Gravitational microlensing exoplanet detection - Free floating planets

Simbad objects: 4

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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 KMT-2025-BLG-1616 Lev 17 51 06.930 -30 08 20.80           ~ 1 0
2 KMT-2025-BLG-1616b Pl? 17 51 06.930 -30 08 20.80           ~ 1 0
3 KMT-2022-BLG-0440 Lev 17 58 20.060 -32 17 43.12           ~ 6 0
4 NAME Galactic Bulge reg ~ ~           ~ 4794 0

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