Speaker
Description
Jupiter Trojans are a population of co-orbital asteroids that share Jupiter’s orbit around the Sun. Owing
to their long-term dynamical stability, they are thought to preserve primordial material and thus provide key
constraints on early Solar System evolution and planetary migration models. In this study, we combine high
cadence observations from the Zwicky Transient Facility (ZTF) obtained in October–November 2024 and
February 2025 (180 s exposures; 3,141 objects) with survey data spanning 2018–2025 (30 s exposures;
1,852 objects) to investigate the physical properties of Jupiter Trojans, including the absolute magnitudes
(H), phase parameters (G), and the colors (g-r).
For the L4 swarm, we find a kernel density estimation (KDE) peak in the g–r color distribution at
0.556, with a corresponding phase parameter of G = 0.304. The cumulative size distribution follows a power
law with slope α = 0.471 ± 0.014 over H = 10–13, and α = 0.428 ± 0.010 over H = 13–15. For the L5
trojans, the KDE peak of the g–r color distribution is 0.576, and the phase parameter (G = 0.384) is slightly
higher than that of L4. The corresponding power-law slopes are α = 0.620 ± 0.019 for H = 10–13 and α =
0.399 ± 0.018 for H = 13–15.
| Participate the oral/poster presentation award competition | Yes |
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