One-day workshop on star-planet systems
November 22, 2022
Onsite meeting at Seminar Room on the ground floor, Big Bang Center, Science Building 4, U-Tokyoand online participation (zoom info provided separately)
Program (25+5min talks, except the special seminar)
13:15 Hajime Fukushima "Radiation hydrodynamics simulations of star cluster formation"13:45 Ryoki Matsukoba "Evolution of low-metallicity disks with dust"
14:15 Ayano Komaki "Photoevaporation of protoplanetary disks"
Break
15:00 **Special Seminar** Thomas Haworth "Planet formation in stellar clusters"
16:00- Discussion session facilitated by Takashi Hosokawa
Special Seminar by Thomas Haworth, 15-16pm
Abstract
Planet forming discs are found around young stars, which are formed in large clustered groups. Massive stars in these clusters emit a lot of UV radiation into the surroundings, which heats and disperses the star forming gas (a process called feedback) and which also can heat and disperse the discs (a process called external photoevaporation). In this talk I will discuss how external photoevaporation works and the influence it has upon the evolution of the disc’s masses, radii and lifetimes. I will also discuss how the actual impact on disc evolution is closely connected to the process of clustered star formation, for example because discs can be shielded for some time by the molecular cloud before being irradiated. Finally I will discuss new work in which we start to study the impact of external photoevaporation on the actual planet formation process in discs. I will show that giant planet growth/migration and planet formation by pebble accretion can both be influenced by external photoevaporation. Note that the following day (23rd November) I will give a review talk on external photoevaporation at the Molecules inEextremeEenvironment Workshop at NAOJ that will focus more on both how chemistry sets the external photoevaporative mass loss rate and in turn how the disc chemistry is affected by external irradiation.