TY - JOUR
T1 - KMT-2023-BLG-0416, KMT-2023-BLG-1454, KMT-2023-BLG-1642
T2 - Microlensing planets identified from partially covered signals
AU - KMTNet Collaboration
AU - OGLE Collaboration
AU - Han, Cheongho
AU - Udalski, Andrzej
AU - Lee, Chung Uk
AU - Zang, Weicheng
AU - Albrow, Michael D.
AU - Chung, Sun Ju
AU - Gould, Andrew
AU - Hwang, Kyu Ha
AU - Jung, Youn Kil
AU - Ryu, Yoon Hyun
AU - Shvartzvald, Yossi
AU - Shin, In Gu
AU - Yee, Jennifer C.
AU - Yang, Hongjing
AU - Cha, Sang Mok
AU - Kim, Doeon
AU - Kim, Dong Jin
AU - Kim, Seung Lee
AU - Lee, Dong Joo
AU - Rybicki, Krzysztof A.
PY - 2024/3/1
Y1 - 2024/3/1
N2 - Aims. We investigate the 2023 season data from high-cadence microlensing surveys with the aim of detecting partially covered shortterm signals and revealing their underlying astrophysical origins. Through this analysis, we ascertain that the signals observed in the lensing events KMT-2023-BLG-0416, KMT-2023-BLG-1454, and KMT-2023-BLG-1642 are of planetary origin. Methods. Considering the potential degeneracy caused by the partial coverage of signals, we thoroughly investigate the lensing-parameter plane. In the case of KMT-2023-BLG-0416, we have identified two solution sets, one with a planet-to-host mass ratio of q ~ 10-2 and the other with q ~ 6 × 10-5, within each of which there are two local solutions emerging due to the inner-outer degeneracy. For KMT-2023-BLG-1454, we discern four local solutions featuring mass ratios of q ~ (1.7-4.3) × 10-3. When it comes to KMT-2023-BLG-1642, we identified two locals with q ~ (6 -10) × 10-3 resulting from the inner-outer degeneracy. Results. We estimate the physical lens parameters by conducting Bayesian analyses based on the event time scale and Einstein radius. For KMT-2023-BLG-0416L, the host mass is ~0.6 M, and the planet mass is ~(6.1-6.7) MJ according to one set of solutions and ~0.04 MJ according to the other set of solutions. KMT-2023-BLG-1454Lb has a mass roughly half that of Jupiter, while KMT-2023-BLG-1646Lb has a mass in the range of between 1.1 to 1.3 times that of Jupiter, classifying them both as giant planets orbiting mid M-dwarf host stars with masses ranging from 0.13 to 0.17 solar masses.
AB - Aims. We investigate the 2023 season data from high-cadence microlensing surveys with the aim of detecting partially covered shortterm signals and revealing their underlying astrophysical origins. Through this analysis, we ascertain that the signals observed in the lensing events KMT-2023-BLG-0416, KMT-2023-BLG-1454, and KMT-2023-BLG-1642 are of planetary origin. Methods. Considering the potential degeneracy caused by the partial coverage of signals, we thoroughly investigate the lensing-parameter plane. In the case of KMT-2023-BLG-0416, we have identified two solution sets, one with a planet-to-host mass ratio of q ~ 10-2 and the other with q ~ 6 × 10-5, within each of which there are two local solutions emerging due to the inner-outer degeneracy. For KMT-2023-BLG-1454, we discern four local solutions featuring mass ratios of q ~ (1.7-4.3) × 10-3. When it comes to KMT-2023-BLG-1642, we identified two locals with q ~ (6 -10) × 10-3 resulting from the inner-outer degeneracy. Results. We estimate the physical lens parameters by conducting Bayesian analyses based on the event time scale and Einstein radius. For KMT-2023-BLG-0416L, the host mass is ~0.6 M, and the planet mass is ~(6.1-6.7) MJ according to one set of solutions and ~0.04 MJ according to the other set of solutions. KMT-2023-BLG-1454Lb has a mass roughly half that of Jupiter, while KMT-2023-BLG-1646Lb has a mass in the range of between 1.1 to 1.3 times that of Jupiter, classifying them both as giant planets orbiting mid M-dwarf host stars with masses ranging from 0.13 to 0.17 solar masses.
UR - http://www.scopus.com/inward/record.url?scp=85188267809&partnerID=8YFLogxK
U2 - 10.1051/0004-6361/202348245
DO - 10.1051/0004-6361/202348245
M3 - Article
AN - SCOPUS:85188267809
SN - 0004-6361
VL - 683
JO - Astronomy and Astrophysics
JF - Astronomy and Astrophysics
M1 - A187
ER -