Exoplanet biosignatures: observational prospects

Y Fujii, D Angerhausen, R Deitrick… - Astrobiology, 2018 - liebertpub.com
Exoplanet hunting efforts have revealed the prevalence of exotic worlds with diverse
properties, including Earth-sized bodies, which has fueled our endeavor to search for life …

A more comprehensive habitable zone for finding life on other planets

RM Ramirez - Geosciences, 2018 - mdpi.com
The habitable zone (HZ) is the circular region around a star (s) where standing bodies of
water could exist on the surface of a rocky planet. Space missions employ the HZ to select …

Day–night cloud asymmetry prevents early oceans on Venus but not on Earth

M Turbet, E Bolmont, G Chaverot, D Ehrenreich… - Nature, 2021 - nature.com
Earth has had oceans for nearly four billion years and Mars had lakes and rivers 3.5–3.8
billion years ago. However, it is still unknown whether water has ever condensed on the …

Atmospheric regimes and trends on exoplanets and brown dwarfs

X Zhang - Research in Astronomy and Astrophysics, 2020 - iopscience.iop.org
A planetary atmosphere is the outer gas layer of a planet. Besides its scientific significance
among the first and most accessible planetary layers observed from space, it is closely …

Demarcating circulation regimes of synchronously rotating terrestrial planets within the habitable zone

J Haqq-Misra, ET Wolf, M Joshi, X Zhang… - The Astrophysical …, 2018 - iopscience.iop.org
We investigate the atmospheric dynamics of terrestrial planets in synchronous rotation within
the habitable zone of low-mass stars using the Community Atmosphere Model. The surface …

Habitable climate scenarios for Proxima Centauri b with a dynamic ocean

AD Del Genio, MJ Way, DS Amundsen, I Aleinov… - Astrobiology, 2019 - liebertpub.com
Abstract The nearby exoplanet Proxima Centauri b will be a prime future target for
characterization, despite questions about its retention of water. Climate models with static …

Ocean dynamics and the inner edge of the habitable zone for tidally locked terrestrial planets

J Yang, DS Abbot, DDB Koll, Y Hu… - The Astrophysical …, 2019 - iopscience.iop.org
Recent studies have shown that ocean dynamics can have a significant warming effect on
the permanent night sides of 1: 1 tidally locked terrestrial exoplanets with Earth-like …

Dim prospects for transmission spectra of ocean Earths around M stars

G Suissa, AM Mandell, ET Wolf… - The Astrophysical …, 2020 - iopscience.iop.org
The search for water-rich Earth-sized exoplanets around low-mass stars is rapidly gaining
attention because they represent the best opportunity to characterize habitable planets in …

Habitability and spectroscopic observability of warm M-dwarf exoplanets evaluated with a 3D chemistry-climate model

H Chen, ET Wolf, Z Zhan, DE Horton - The Astrophysical Journal, 2019 - iopscience.iop.org
Planets residing in circumstellar habitable zones offer us the best opportunities to test
hypotheses of life's potential pervasiveness and complexity. Constraining the precise …

Climates of warm Earth-like planets. I. 3D model simulations

MJ Way, AD Del Genio, I Aleinov… - The Astrophysical …, 2018 - iopscience.iop.org
We present a large ensemble of simulations of an Earth-like world with increasing insolation
and rotation rate. Unlike previous work utilizing idealized aquaplanet configurations, we …