Living at the extremes: extremophiles and the limits of life in a planetary context

N Merino, HS Aronson, DP Bojanova… - Frontiers in …, 2019 - frontiersin.org
Prokaryotic life has dominated most of the evolutionary history of our planet, evolving to
occupy virtually all available environmental niches. Extremophiles, especially those thriving …

Exoplanetary atmospheres: key insights, challenges, and prospects

N Madhusudhan - Annual Review of Astronomy and …, 2019 - annualreviews.org
Exoplanetary science is on the verge of an unprecedented revolution. The thousands of
exoplanets discovered over the past decade have most recently been supplemented by …

Carbon-bearing molecules in a possible Hycean atmosphere

N Madhusudhan, S Sarkar… - The Astrophysical …, 2023 - iopscience.iop.org
The search for habitable environments and biomarkers in exoplanetary atmospheres is the
holy grail of exoplanet science. The detection of atmospheric signatures of habitable Earth …

Possible Hycean conditions in the sub-Neptune TOI-270 d

M Holmberg, N Madhusudhan - Astronomy & Astrophysics, 2024 - aanda.org
The JWST has ushered in a new era in atmospheric characterisations of temperate low-
mass exoplanets with recent detections of carbon-bearing molecules in the candidate …

Oxygenation, life, and the planetary system during Earth's middle history: An overview

TW Lyons, CW Diamond, NJ Planavsky, CT Reinhard… - Astrobiology, 2021 - liebertpub.com
The long history of life on Earth has unfolded as a cause-and-effect relationship with the
evolving amount of oxygen (O2) in the oceans and atmosphere. Oxygen deficiency …

The case and context for atmospheric methane as an exoplanet biosignature

MA Thompson, J Krissansen-Totton, N Wogan… - Proceedings of the …, 2022 - pnas.org
Methane has been proposed as an exoplanet biosignature. Imminent observations with the
James Webb Space Telescope may enable methane detections on potentially habitable …

The detectability and characterization of the TRAPPIST-1 exoplanet atmospheres with JWST

J Lustig-Yaeger, VS Meadows… - The Astronomical …, 2019 - iopscience.iop.org
Abstract The James Webb Space Telescope (JWST) will offer the first opportunity to
characterize terrestrial exoplanets with sufficient precision to identify high mean molecular …

Habitability and biosignatures of Hycean worlds

N Madhusudhan, AAA Piette… - The Astrophysical …, 2021 - iopscience.iop.org
We investigate a new class of habitable planets composed of water-rich interiors with
massive oceans underlying H 2-rich atmospheres, referred to here as Hycean worlds. With …

Investigating and quantifying molecular complexity using assembly theory and spectroscopy

M Jirasek, A Sharma, JR Bame, SHM Mehr… - ACS Central …, 2024 - ACS Publications
Current approaches to evaluate molecular complexity use algorithmic complexity, rooted in
computer science, and thus are not experimentally measurable. Directly evaluating …

A comparative study of atmospheric chemistry with VULCAN

SM Tsai, M Malik, D Kitzmann, JR Lyons… - The Astrophysical …, 2021 - iopscience.iop.org
We present an update of the open-source photochemical kinetics code VULCAN to include
C–H–N–O–S networks and photochemistry. The additional new features are advection …