Do the TRAPPIST-1 Planets Have Hydrogen-rich Atmospheres?
Do the TRAPPIST-1 Planets Have Hydrogen-rich Atmospheres?
复制标题
TRAPPIST-1 行星是否拥有富氢大气层?
DOI:
10.3847/1538-4357/ab6168
复制
发表时间:
2019
期刊:
影响因子:
--
通讯作者:
M. Ogihara
中科院分区:
文献类型:
--
作者:
Y. Hori;M. Ogihara
Recently, transmission spectroscopy in the atmospheres of the TRAPPIST-1 planets revealed flat and featureless absorption spectra, which rule out cloud-free, hydrogen-dominated atmospheres. Earth-sized planets orbiting TRAPPIST-1 likely have either a clear or a cloudy/hazy, hydrogen-poor atmosphere. In this paper, we investigate whether a proposed formation scenario is consistent with expected atmospheric compositions of the TRAPPIST-1 planets. We examine the amount of hydrogen-rich gas that TRAPPIST-1-like planets accreted from the ambient disk until disk dispersal. Since TRAPPIST-1 planets are trapped into a resonant chain, we simulate disk gas accretion onto a migrating TRAPPIST-1-like planet. We find that the amount of accreted hydrogen-rich gas is as small as 10−2 wt% and 0.1 wt% for TRAPPIST-1 b and 1 c, 10−2 wt% for 1 d, 1 wt% for 1 e, a few wt% for 1 f and 1 g and 1 wt% for 1 h, respectively. We also calculate the long-term thermal evolution of TRAPPIST-1-like planets after disk dissipation and estimate the mass loss of their hydrogen-rich atmospheres driven by stellar X-ray and UV irradiation. We find that all the accreted hydrogen-rich atmospheres can be lost via hydrodynamic escape. Therefore, we conclude that TRAPPIST-1 planets should have no primordial hydrogen-rich gases but secondary atmospheres such as a Venus-like one and water vapor, if they currently retain atmospheres.
登录
查看更多内容
DOI:
10.1051/0004-6361/201628955
发表时间:
2016-09
期刊:
Astronomy & Astrophysics
影响因子:
--
作者:
T. Suzuki;M. Ogihara;A. Morbidelli;A. Crida;T. Guillot
通讯作者:
T. Suzuki;M. Ogihara;A. Morbidelli;A. Crida;T. Guillot
DOI:
10.1086/591224
发表时间:
2008-06
期刊:
The Astrophysical Journal
影响因子:
--
作者:
J. Hernández;L. Hartmann;N. Calvet;R. Jeffries;R. Gutermuth;J. Muzerolle;J. I. O. Astronomy;U. Michigan;Ann Arbor;Mi;US Centro de Investigaciones de Astronomia-US-Centro-de-Investigaciones-de-Astronomia-2264414383;Merida;Venezuela Astrophysics Group;K. University;Keele;S. C. M. F. Astrophysics;Ma;Usa Steward Observatory;U. Arizona;Tucson;Az;Usa Herschel Science Center;Pasadena;Ca;US.
通讯作者:
J. Hernández;L. Hartmann;N. Calvet;R. Jeffries;R. Gutermuth;J. Muzerolle;J. I. O. Astronomy;U. Michigan;Ann Arbor;Mi;US Centro de Investigaciones de Astronomia-US-Centro-de-Investigaciones-de-Astronomia-2264414383;Merida;Venezuela Astrophysics Group;K. University;Keele;S. C. M. F. Astrophysics;Ma;Usa Steward Observatory;U. Arizona;Tucson;Az;Usa Herschel Science Center;Pasadena;Ca;US.
影响因子:
6.5
作者:
M. Ogihara;E. Kokubo;T. Suzuki;A. Morbidelli
通讯作者:
M. Ogihara;E. Kokubo;T. Suzuki;A. Morbidelli
DOI:
--
发表时间:
2006
期刊:
影响因子:
--
作者:
羽鳥 理;三浦 毅(発表者);高木 啓行;三浦 毅;三浦毅;K. Eda;K. Eda;K. Kawamura;K. Eda;加藤 久男;三浦 毅;三浦毅・木間大;T. Miura and D. Honma;O. Hatori;高橋眞映・三浦毅・早田孝博;T. Miura. S-E. Takahasi and T. Hayata;羽鳥理・三浦毅・高木啓行;山崎薫里
通讯作者:
山崎薫里
DOI:
10.3847/1538-4357/aae534
发表时间:
2018
期刊:
The Astrophysical Journal
影响因子:
--
作者:
Ogihara Masahiro;Hori Yasunori
通讯作者:
Hori Yasunori