Abstract
Abstract
We present the analyses of two microlensing events, OGLE-2018-BLG-0567 and OGLE-2018-BLG-0962. In both events, the short-lasting anomalies were densely and continuously covered by two high-cadence surveys. The light-curve modeling indicates that the anomalies are generated by source crossings over the planetary caustics induced by planetary companions to the hosts. The estimated planet/host separation (scaled to the angular Einstein radius θ
E) and mass ratio are (s, q × 103) = (1.81 ± 0.02, 1.24 ± 0.07) and (s, q × 103) = (1.25 ± 0.03, 2.38 ± 0.08), respectively. From Bayesian analyses, we estimate the host and planet masses as
(
M
h
,
M
p
)
=
(
0.25
−
0.13
+
0.27
M
⊙
,
0.32
−
0.17
+
0.34
M
J
)
and
(
M
h
,
M
p
)
=
(
0.54
−
0.28
+
0.33
M
⊙
,
1.34
−
0.70
+
0.82
M
J
)
, respectively. These planetary systems are located at a distance of
7.06
−
1.15
+
0.93
kpc
for OGLE-2018-BLG-0567 and
6.50
−
1.75
+
1.06
kpc
for OGLE-2018-BLG-0962, suggesting that they are likely to be near the Galactic bulge. The two events prove the capability of current high-cadence surveys for finding planets through the planetary-caustic channel. We find that most published planetary-caustic planets are found in Hollywood events in which the source size strongly contributes to the anomaly cross-section relative to the size of the caustic.
Funder
National Research Foundation of Korea
National Science Centre, Poland
Publisher
American Astronomical Society
Subject
Space and Planetary Science,Astronomy and Astrophysics
Cited by
28 articles.
订阅此论文施引文献
订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献