JpGU-AGU Joint Meeting 2017

Presentation information

[EJ] Poster

P (Space and Planetary Sciences) » P-PS Planetary Sciences

[P-PS04] [EJ] New developments of planetary sciences with ALMA

Wed. May 24, 2017 3:30 PM - 5:00 PM Poster Hall (International Exhibition Hall HALL7)

convener:Munetake Momose(The College of Science, Ibaraki University), Hiroshi Kobayashi(Department of Physics, Nagoya University), Masumi Shimojo(National Astronomical Observatory of Japan), Hideko Nomura(Department of Earth and Planetary Sciences, Tokyo Institute of Technology)

[PPS04-P11] Gases in Debris disks

*Hiroshi Kobayashi1, Kazunari Iwasaki2 (1.Department of Physics, Nagoya University, 2.Doshisha University)

Keywords:debris disks, gas depletion, chemical reaction

The circumstellar disks found around main-squence stars are mainly gas poor and faint, which are called debris disks. Protoplanetary disks in which planets are believed to form may evolve to be debris disks after or during planet formation. Gas in protoplanetary disks plays important roles for planet formation such as gas giant formation, planetary migration, onset of giant impact stage, etc. Recently, CO gases in debris disks are observed, which give information about gas depletion from protoplanetary to debris disks. However, planet formation is sensitive to surface densities of gases that are determined by the amount of hydrogen. We calculate the chemical reaction in debris disks and try to give a constraint on the amount of hydrogen molecule in debris disks.