529 citations · 1.3k across the 16 of their papers we have counts for
16 papers
The Importance of the Upper Atmosphere to CO/O Runaway on Habitable Planets Orbiting Low-Mass Stars
Sukrit Ranjan, Edward W. Schwieterman, Michaela Leung +2
Efforts to spectrally characterize the atmospheric compositions of temperate terrestrial exoplanets orbiting M-dwarf stars with the James Webb Space Telescope (JWST) are now underw…
The K2-3 system revisited: testing photoevaporation and core-powered mass loss with three small planets spanning the radius valley
Hannah Diamond-Lowe, Laura Kreidberg, C. E. Harman +11
Multi-planet systems orbiting M dwarfs provide valuable tests of theories of small planet formation and evolution. K2-3 is an early M dwarf hosting three small exoplanets (1.5-2.0…
A hot Mars-sized exoplanet transiting an M dwarf
Caleb I. Cañas, Suvrath Mahadevan, William D. Cochran +21
We validate the planetary nature of an ultra-short period planet orbiting the M dwarf KOI-4777. We use a combination of space-based photometry from Kepler, high-precision, near-inf…
A Snowball in Hell: The Potential Steam Atmosphere of TOI-1266c
C. E. Harman, Ravi Kumar Kopparapu, Guðmundur Stefánsson +4
TOI-1266c is a recently discovered super-Venus in the radius valley orbiting an early M dwarf. However, its notional bulk density (2.2 g cm) is consistent with a large…
Enabling Effective Exoplanet / Planetary Collaborative Science
Mark S. Marley, Chester Harman, Heidi B. Hammel +11
The field of exoplanetary science has emerged over the past two decades, rising up alongside traditional solar system planetary science. Both fields focus on understanding the proc…
Photochemistry of Anoxic Abiotic Habitable Planet Atmospheres: Impact of New HO Cross-Sections
Sukrit Ranjan, Edward W. Schwieterman, Chester Harman +4
We present a study of the photochemistry of abiotic habitable planets with anoxic CO-N atmospheres. Such worlds are representative of early Earth, Mars and Venus, and analo…
Rethinking CO Antibiosignatures in the Search for Life Beyond the Solar System
Edward W. Schwieterman, Christopher T. Reinhard, Stephanie L. Olson +4
Some atmospheric gases have been proposed as counter indicators to the presence of life on an exoplanet if remotely detectable at sufficient abundance (i.e., antibiosignatures), in…
Opportunities for Astrophysical Science from the Inner and Outer Solar System
Michael Zemcov, Iair Arcavi, Richard G. Arendt +22
Astrophysical measurements away from the 1 AU orbit of Earth can enable several astrophysical science cases that are challenging or impossible to perform from Earthbound platforms,…
A Limited Habitable Zone for Complex Life
Edward W. Schwieterman, Christopher T. Reinhard, Stephanie L. Olson +2
The habitable zone (HZ) is commonly defined as the range of distances from a host star within which liquid water, a key requirement for life, may exist on a planet's surface. Subst…
Exoplanet Diversity in the Era of Space-based Direct Imaging Missions
Ravi Kopparapu, Eric Hebrard, Rus Belikov +55
This whitepaper discusses the diversity of exoplanets that could be detected by future observations, so that comparative exoplanetology can be performed in the upcoming era of larg…
Life Beyond the Solar System: Remotely Detectable Biosignatures
Shawn Domagal-Goldman, Nancy Y. Kiang, Niki Parenteau +38
For the first time in human history, we will soon be able to apply the scientific method to the question "Are We Alone?" The rapid advance of exoplanet discovery, planetary systems…
Exoplanet Biosignatures: A Review of Remotely Detectable Signs of Life
Edward W. Schwieterman, Nancy Y. Kiang, Mary N. Parenteau +15
In the coming years and decades, advanced space- and ground-based observatories will allow an unprecedented opportunity to probe the atmospheres and surfaces of potentially habitab…
Limit cycles can reduce the width of the habitable zone
Jacob Haqq-Misra, Ravi Kumar Kopparapu, Natasha E. Batalha +2
The liquid water habitable zone (HZ) describes the orbital distance at which a terrestrial planet can maintain above-freezing conditions through regulation by the carbonate-silicat…
Identifying Planetary Biosignature Impostors: Spectral Features of CO and O4 Resulting from Abiotic O2/O3 Production
Edward W. Schwieterman, Victoria S. Meadows, Shawn D. Domagal-Goldman +6
O2 and O3 have been long considered the most robust individual biosignature gases in a planetary atmosphere, yet multiple mechanisms that may produce them in the absence of life ha…
Abiotic O Levels on Planets around F, G, K, and M Stars: Possible False Positives for Life?
C. E. Harman, E. W. Schwieterman, J. C. Schottelkotte +1
In the search for life on Earth-like planets around other stars, the first (and likely only) information will come from the spectroscopic characterization of the planet's atmospher…
Remote Life Detection Criteria, Habitable Zone Boundaries, and the Frequency of Earthlike Planets around M and Late-K Stars
James F. Kasting, Ravi Kopparapu, Ramses M. Ramirez +1
The habitable zone (HZ) around a star is typically defined as the region where a rocky planet can maintain liquid water on its surface. That definition is appropriate, because this…