Development of a radiative transfer model for Super-Earths and mapping of a habitable zone

2015 Fiscal Year Final Research Report

• Project/Area Number: 25800264
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Meteorology/Physical oceanography/Hydrology
• Research Institution: Kobe University
• Principal Investigator: Onishi Masanori 神戸大学, 理学(系)研究科(研究院), 研究員 (50644887)
• Project Period (FY): 2013-04-01 – 2016-03-31
• Keywords: 系外惑星 / ハビタブルゾーン / 放射伝達 / スーパーアース / 水損失限界 / モデル開発

Outline of Final Research Achievements

In order to estimate how habitable zone spreads in outer space and discuss about habitability for exoplanets including Super-Earths, a radiative transfer model was developed. The model is based on line-by-line method and calculates planetary radiative transfer from arbitrary temperature and mixing ratio profiles. A model based on k-distribution method was also developed for radiative-convective models and atmospheric global circulation models. These models indicate that there are two regimes for tropopause in planetary atmospheres, which is important for determining an inner edge of habitable zone. The tropopause regimes are a dry low-temperature regime and a moist high-temperature regime.

Free Research Field

惑星科学