Japan Geoscience Union Meeting 2018

Presentation information

[JJ] Evening Poster

P (Space and Planetary Sciences) » P-CG Complex & General

[P-CG22] New Developments of Planetary Sciences with ALMA

Wed. May 23, 2018 5:15 PM - 6:30 PM Poster Hall (International Exhibition Hall7, Makuhari Messe)

convener:Takayuki Muto(Division of Liberal Arts, Kogakuin University), Munetake Momose(The College of Science, Ibaraki University), Hideo Sagawa(京都産業大学理学部, 共同), Masumi Shimojo(National Astronomical Observatory of Japan)

[PCG22-P15] Origin of gas in debris disks and Ci observation

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

Keywords:protoplanetary disk, debris disk, gas depletion

Planets are born in protoplanetary disks. Gas depletion of the disks significantly affects planet formation. However, observational evidence for gas depletion is not obtained yet. Debris disks are believed to be evoluved protoplanetary disks. In some debris disks, CO gases are detected. Such thin CO gases are produced from outgassing of solid bodies that we could not distinguish the origin. We perform PDR calculation for denbris disks, which show that the origin is given from the amount of carbon gases in debris disks. Carbon gases have been detected in debris disks around beta Pic and 49 Cet. From the density ratio between C and CO, we conclude the gases in the debris disks are protoplanetary disk remnant.