HYDROGEN GREENHOUSE PLANETS BEYOND THE HABITABLE ZONE
@article{Pierrehumbert2011HYDROGENGP, title={HYDROGEN GREENHOUSE PLANETS BEYOND THE HABITABLE ZONE}, author={Raymond T. Pierrehumbert and Eric Gaidos}, journal={The Astrophysical Journal}, year={2011}, volume={734} }
We show that collision-induced absorption allows molecular hydrogen to act as an incondensible greenhouse gas and that bars or tens of bars of primordial H2–He mixtures can maintain surface temperatures above the freezing point of water well beyond the “classical” habitable zone defined for CO2 greenhouse atmospheres. Using a onedimensional radiative–convective model, we find that 40 bars of pure H2 on a three Earth-mass planet can maintain a surface temperature of 280 K out to 1.5 AU from an…
191 Citations
A Methane Extension to the Classical Habitable Zone
- Physics, Geology
- 2018
The habitable zone (HZ) is the circumstellar region where standing bodies of liquid water could exist on the surface of a rocky planet. Conventional definitions assume that CO2 and H2O are the only…
A Volcanic Hydrogen Habitable Zone
- Geology, Physics
- 2017
The classical habitable zone (HZ) is the circular region around a star in which liquid water could exist on the surface of a rocky planet. The outer edge of the traditional N2–CO2–H2O HZ extends out…
A PROPOSAL FOR CLIMATE STABILITY ON H2-GREENHOUSE PLANETS.
- PhysicsThe astrophysical journal. Letters
- 2015
Stabilizing climate feedbacks for H2-warmed planets that require only that biological functions have an optimal temperature and operate less efficiently at other temperatures are proposed.
Habitable Moist Atmospheres On Terrestrial Planets Near the Inner Edge Of the Habitable Zone Around M-dwarfs
- Physics, Geology
- 2017
Terrestrial planets in the habitable zones (HZs) of low-mass stars and cool dwarfs have received significant scrutiny recently because their shorter orbital periods increase their chances of…
Volcanism and outgassing of stagnant-lid planets: Implications for the habitable zone
- Geology, Physics
- 2017
Hydrogen-Nitrogen Greenhouse Warming in Earth's Early Atmosphere
- Environmental Science, PhysicsScience
- 2013
It is shown that with an atmospheric composition consistent with the most recent constraints, the early Earth would have been significantly warmed by H2-N2 collision–induced absorption, key to warming the atmosphere of theEarly Earth.
The influence of surface CO2 condensation on the evolution of warm and cold rocky planets orbiting Sun-like stars
- Physics, Geology
- 2021
The habitable zone is the region around a star where standing bodies of liquid water can be stable on a planetary surface. Its width is often assumed to be dictated by the efficiency of the…
TOWARD THE MINIMUM INNER EDGE DISTANCE OF THE HABITABLE ZONE
- Physics, Geology
- 2013
We explore the minimum distance from a host star where an exoplanet could potentially be habitable in order not to discard close-in rocky exoplanets for follow-up observations. We find that the inner…
Transient reducing greenhouse warming on early Mars
- Physics, Geology
- 2016
The evidence for abundant liquid water on early Mars despite the faint young Sun is a long‐standing problem in planetary research. Here we present new ab initio spectroscopic and line‐by‐line climate…
Photosynthesis in Hydrogen-Dominated Atmospheres
- Physics, Environmental ScienceLife
- 2014
The evolution of methane-based photosynthesis is at least as likely as the evolution of anoxygenic photosynthesis on Earth and may support the development of complex life.
References
SHOWING 1-10 OF 49 REFERENCES
Habitable zones around main sequence stars.
- Physics, GeologyIcarus
- 1993
The results suggest that mid-to-early K stars should be considered along with G stars as optimal candidates in the search for extraterrestrial life.
Is Gliese 581d habitable? Some constraints from radiative-convective climate modeling
- Geology, Physics
- 2010
The recently discovered exoplanet Gl 581d is extremely close to the outer edge of its system’s habitable zone, which has led to much speculation on its possible climate. We have performed a range of…
Life-sustaining planets in interstellar space?
- Geology, PhysicsNature
- 1999
During planet formation, rock and ice embryos of the order of Earth's mass may be formed, some of which may be ejected from the Solar System as they scatter gravitationally from proto-giant planets.…
Constraints on the mass of a habitable planet with water of nebular origin
- Physics, Geology
- 2006
From an astrobiological point of view, special attention has been paid to the probability of habitable planets in extrasolar systems. The purpose of this study is to constrain a possible range of the…
Atmospheric Escape From Hot Jupiters
- Physics, Geology
- 2008
Photoionization heating from ultraviolet (UV) radiation incidents on the atmospheres of hot Jupiters may drive planetary mass loss. Observations of stellar Lyman-α (Lyα) absorption have suggested…
The dynamics of a rapidly escaping atmosphere: Applications to the evolution of Earth and Venus
- Physics, Geology
- 1981
Radiative constraints on the habitability of exoplanets Gliese 581c and Gliese 581d
- Physics, Geology
- 2011
Aims. The M-type star Gliese 581 is likely to have two super-Earth planets, i.e., Gl 581c and Gl 581d. The present study is to investigate their habitability constrained by radiative properties of…
Atmospheres of Protoplanetary Cores: Critical Mass for Nucleated Instability
- Physics, Geology
- 2004
We systematically study quasi-static atmospheres of accreting protoplanetary cores for different opacity behaviors and realistic planetesimal accretion rates in various parts of the protoplanetary…
Enhanced atmospheric loss on protoplanets at the giant impact phase in the presence of oceans
- Geology, PhysicsNature
- 2005
It is suggested that remnants of the noble-gas rich proto-atmosphere survived on Venus, but not on Earth, because most of the neon must have escaped from both planets’ atmospheres later to yield the observed ratio of neon to argon.