Japan Geoscience Union Meeting 2019

Presentation information

[J] Poster

M (Multidisciplinary and Interdisciplinary) » M-GI General Geosciences, Information Geosciences & Simulations

[M-GI35] Development of computational sciences on planetary formation, evolution and surface environment

Tue. May 28, 2019 5:15 PM - 6:30 PM Poster Hall (International Exhibition Hall8, Makuhari Messe)

convener:Yoshi-Yuki Hayashi(Department of Planetology/CPS, Graduate School of Science, Kobe University), Masaki Ogawa(Division of General Systems Studies, Graduate School of Arts and Sciences, University of Tokyo), Shigeru Ida(Earth-Life Science Institute, Tokyo Institute of Technology), Kanya Kusano(Institute for Space-Earth Environmental Research, Nagoya University)

[MGI35-P04] Protostellar flares driven by accretion in protoplanetary disks

*Shinsuke Takasao1, Kengo Tomida2, Shinsuke Takasao2, Takeru Suzuki3 (1.Nagoya University, 2.Osaka University, 3.University of Tokyo)

Keywords:protoplanetary disks, flare

X-ray observations reveal that protostars produce huge explosions frequently. There is discussions that protostellar flares may play roles in forming chondrules that are important building blocks of planets. Protostellar flares are similar to solar flares, and are considered as explosions driven by magnetic energy release. However, protostellar flares are much more energetic than solar flares. The huge energy suggests that flare size should be larger than the stellar radius, which implies that a different energy build up process is required. We investigate the mechanism of protostellar flares using 3D MHD simulations. Our simulations revealed that the energy build up is done by the accumulation of magnetic flux by accretion from the protoplanetary disk. In this paper we will discuss the physics on the basis of our simulaitons.