KMT-2021-BLG-1122L: The first microlensing triple stellar system
arXiv:2302.05613 · doi:10.1051/0004-6361/202245644
Abstract
We systematically inspect the microlensing data acquired by the KMTNet survey during the previous seasons in order to find anomalous lensing events for which the anomalies in the lensing light curves cannot be explained by the usual binary-lens or binary-source interpretations. From the inspection, we find that interpreting the three lensing events OGLE-2018-BLG-0584, KMT-2018-BLG-2119, and KMT-2021-BLG-1122 requires four-body (lens+source) models, in which either both the lens and source are binaries (2L2S event) or the lens is a triple system (3L1S event). Following the analyses of the 2L2S events presented in \citet{Han2023}, here we present the 3L1S analysis of the KMT-2021-BLG-1122. It is found that the lens of the event KMT-2021-BLG-1122 is composed of three masses, in which the projected separations (normalized to the angular Einstein radius) and mass ratios between the lens companions and the primary are and . By conducting a Bayesian analysis, we estimate that the masses of the individual lens components are . The companions are separated in projection from the primary by ~AU. The lens of KMT-2018-BLG-2119 is the first triple stellar system detected via microlensing.
arXiv comment8 pages, 7 figures, 2 tables
References in corpus (40)
- Reddening and Extinction Toward the Galactic Bulge from OGLE-III: The Inner Milky Way's Rv ~ 2.5 Extinction Curve
- Real-Time Difference Imaging Analysis of MOA Galactic Bulge Observations During 2000
- Chemical evolution of the Galactic bulge as traced by microlensed dwarf and subgiant stars. V. Evidence for a wide age distribution and a complex MDF
- The angular size of dwarf stars and subgiants - Surface brightness relations calibrated by interferometry
- OGLE-2003-BLG-262: Finite-Source Effects from a Point-Mass Lens
- Discovery of a Jupiter/Saturn Analog with Gravitational Microlensing
- Detecting Earth-Mass Planets with Gravitational Microlensing
- A Natural Formalism for Microlensing
- Difference imaging photometry of blended gravitational microlensing events with a numerical kernel
- MOA-2011-BLG-293Lb: A test of pure survey microlensing planet detections
- Planetary Detection Efficiency of the Magnification 3000 Microlensing Event OGLE-2004-BLG-343
- Masses and Orbital Constraints for the OGLE-2006-BLG-109Lb,c Jupiter/Saturn Analog Planetary System
- Korea Microlensing Telescope Network Microlensing Events from 2015: Event-Finding Algorithm, Vetting, and Photometry
- The First Circumbinary Planet Found by Microlensing: OGLE-2007-BLG-349L(AB)c
- Microlensing by Multiple Planets in High Magnification Events
- A Terrestrial Planet in a ~1 AU Orbit Around One Member of a ~15 AU Binary
- Triple Microlens OGLE-2008-BLG-092L: Binary Stellar System with a Circumprimary Uranus-type Planet
- The second multiple-planet system discovered by microlensing: OGLE-2012-BLG-0026Lb, c, a pair of jovian planets beyond the snow line
- Einstein Radii from Binary Lensing Events
- Revisiting the microlensing event OGLE 2012-BLG-0026: A solar mass star with two cold giant planets
- OGLE-2018-BLG-0567Lb and OGLE-2018-BLG-0962Lb: Two Microlensing Planets through Planetary-Caustic Channel
- Critical Curves and Caustics of Triple-lens Models
- OGLE-2017-BLG-0173Lb: Low Mass-Ratio Planet in a "Hollywood" Microlensing Event
- OGLE-2018-BLG-1011L\lowercase{b,c}: Microlensing Planetary System with Two Giant Planets Orbiting a Low-mass Star
- OGLE-2018-BLG-1700L: Microlensing Planet in Binary Stellar System
- Effect of a wide binary companion to the lens on the astrometric behavior of gravitational microlensing events
- Triple-lens Gravitational Microlensing: Critical Curves for Arbitrary Spatial Configuration
- A Likely Detection of a Two-Planet System in a Low Magnification Microlensing Event
- Image-plane Analysis of n-point-mass Lens Critical Curves and Caustics
- KMT-2021-BLG-1077L: The fifth confirmed multiplanetary system detected by microlensing
- OGLE-2018-BLG-0532Lb: Cold Neptune With Possible Jovian Sibling
- OGLE-2019-BLG-1470LABc: Another Microlensing Giant Planet in a Binary System?
- A Gas Giant Planet in the OGLE-2006-BLG-284L Stellar Binary System
- One Planet or Two Planets? The Ultra-sensitive Extreme-magnification Microlensing Event KMT-2019-BLG-1953
- KMT-2019-BLG-1715: planetary microlensing event with three lens masses and two source stars
- OGLE-2018-BLG-0584 and KMT-2018-BLG-2119: two microlensing events with two lens masses and two source stars
- KMT-2021-BLG-0240: Microlensing event with a deformed planetary signal
- Brown-dwarf companions in microlensing binaries detected during the 2016--2018 seasons
- A Pair of Planets Likely in Mean-motion Resonance From Gravitational Microlensing
- OGLE-2019-BLG-0304: Competing Interpretations between a Planet-binary Model and a Binary-source + Binary-lens model