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Subaru Seminars are usually held in Room 104 of the Hilo Base Facility, adjacent to the main lobby. Everyone is welcome to attend. If you would like to give a seminar, please contact Subaru seminar organizers (Thayne Currie, Tae-Soo Pyo, Nagayoshi Ohashi) by email : (please change"_at" to @).

January 26, Thursday, 11 am in 104B

" Jupiter Trojan Survey with Hyper Suprime-Cam "

Tsuyoshi Terai


Jupiter Trojans (JTs), two asteroid swarms librating around the L4 and L5 Lagrangian points of Jupiter's orbit, are an important small-body population for investigating the migration of outer planets and extensive dynamical evolution of small bodies in the early solar system. However, the origin and capture mechanism of JTs remain unclear. We performed a wide-field survey targeting L4 JTs using Hyper Suprime-Cam and measured the size distribution of the km-size JT population which has been characterized by collisional evolution depending on the body physical properties. We detected 631 JTs and 130 Hilda asteroids mostly between ~1-10 km in diameter from the survey area of 26 deg^2. The data allowed us to find that (1) the size distribution of JTs is well approximated by a single-slope power law and (2) the shape of Hilda's size distribution is very similar to that of JTs in the km size range.

Seminars are also held at JAC, CFHT, and IfA.

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