Results 41 to 50 of about 1,944 (221)

The Great Cosmic Silence: What Does the Fermi Paradox Tell About the Future of Humanity?

Global Policy, EarlyView.
ABSTRACT This article examines how institutional time horizons shape the long‐term survival prospects of human technological civilisation. While research on global catastrophic and existential risks has expanded, the temporal structures of political‐economic institutions remain underexamined.
Heikki Patomäki
wiley   +1 more source

Expected performances of the Characterising Exoplanet Satellite (CHEOPS) II. The CHEOPS simulator [PDF]

, 2020
Funding: European Research Council (ERC) under the European Union’s Horizon 2020 research and innovation programme (project FourAces; grant agreement No 724427).
Collier Cameron, Andrew, Ehrenreich, D., Fortier, A., A. Fortier, C. Broeg, A. E. Simon, Bourrier, V., Fortier, Andrea, Kuntzer, Thibault, Simon, A. E., Broeg, Christopher, W. Benz, Wildi, Francois, Rohlfs, Reiner, Queloz, Didier, Bekkelien, A., A. Bekkelien, F. Wildi, Lendl, Monika, Queloz, D., Kuntzer, T., Benz, Willy, Beck, M., M. Lendl, D. Queloz, R. Rohlfs, Deline, A., D. Futyan, Beck, Mathias, D. Ehrenreich, A. Deline, Futyan, D., Billot, N., Billot, Nicolas, Simon, Attila E., Bourrier, Vincent, Wildi, F., Deline, Adrien, A. Collier Cameron, M. Beck, V. Bourrier, Ehrenreich, David, Collier Cameron, A., Lendl, M., Broeg, C., T. Kuntzer, Bekkelien, Anja, Benz, W., Rohlfs, R., Futyan, David, N. Billot   +50 more
core   +1 more source

Atmospheric C/O Ratios of Sub-Neptunes with Magma Oceans: Homemade rather than Inherited

The Astrophysical Journal Letters
Recently, the James Webb Space Telescope has enabled detailed spectroscopic characterization of sub-Neptune atmospheres. With detections of carbon- and oxygen-bearing species such as CO, CO _2 , CH _4 , and H _2 O, a central question is whether the ...
Aaron Werlen, Caroline Dorn, Hilke E. Schlichting, Simon L. Grimm, Edward D. Young   +4 more
doaj   +1 more source

Design Considerations for Visualization Transitions of 3D Spatial Data in Hybrid AR‐Desktop Environments

Computer Graphics Forum, EarlyView.
We present design considerations for animated transitions of the appearance of 3D spatial datasets in a hybrid Augmented Reality‐desktop context. Such hybrid interfaces combine both traditional and immersive displays to facilitate the exploration of 2D and 3D data representations in the environment in which they are best displayed.
Yucheng Lu, Tobias Rau, Benjamin Lee, Andreas Köhn, Michael Sedlmair, Christian Sandor, Tobias Isenberg   +6 more
wiley   +1 more source

Sub-Neptunes Are Drier than They Seem: Rethinking the Origins of Water-rich Worlds

The Astrophysical Journal Letters
Recent claims of biosignature gases in sub-Neptune atmospheres have renewed interest in water-rich sub-Neptunes with surface oceans, often referred to as Hycean planets. These planets are hypothesized to form beyond the snow line, accreting large amounts
Aaron Werlen, Caroline Dorn, Remo Burn, Hilke E. Schlichting, Simon L. Grimm, Edward D. Young   +5 more
doaj   +1 more source

A Library of Self-consistent Simulated Exoplanet Atmospheres [PDF]

, 2019
The weather and climate of a planetary atmosphere is governed by its pressure-temperature (P-T) structure. The P-T structure also governs its spectral signatures, when remotely observed.
Goyal, Jayesh
core   +3 more sources

The Effects of Non-ideal Mixing in Planetary Magma Oceans and Atmospheres

The Astrophysical Journal
Sub-Neptunes with hydrogen-rich envelopes are expected to sustain long-lived magma oceans that continuously exchange volatiles with their overlying atmospheres.
Aaron Werlen, Edward D. Young, Hilke E. Schlichting, Caroline Dorn, Anat Shahar   +4 more
doaj   +1 more source

A Possible Metal-dominated Atmosphere below the Thick Aerosols of GJ 1214 b Suggested by Its JWST Panchromatic Transmission Spectrum

The Astrophysical Journal Letters
GJ 1214b is the archetype sub-Neptune for which thick aerosols have prevented us from constraining its atmospheric properties for over a decade. In this study, we leverage the panchromatic transmission spectrum of GJ 1214b established by the Hubble Space
Kazumasa Ohno, Everett Schlawin, Taylor J. Bell, Matthew M. Murphy, Thomas G. Beatty, Luis Welbanks, Thomas P. Greene, Jonathan J. Fortney, Vivien Parmentier, Isaac R. Edelman, Nishil Mehta, Marcia J. Rieke   +11 more
doaj   +1 more source

Effect of Laboratory Reagents for Cleaning Modern Contamination on the δ15N Integrity of Nitrogen‐Poor Samples

Rapid Communications in Mass Spectrometry, Volume 40, Issue 19, 15 October 2026.
ABSTRACT Rationale Nitrogen isotope values have been widely used for tracing ancient biogeochemical processes, but contaminant‐sensitive materials, such as Precambrian sedimentary rocks, meteorites, or returned extraterrestrial samples, often have low nitrogen levels and are thus vulnerable to modern organic contamination.
Kunmanee Bubphamanee, Andrew Schauer, Roger Buick   +2 more
wiley   +1 more source

Thermoelastic Contraction as a Suppressor of Atmospheric Escape in Close-in Exoplanets

The Astrophysical Journal
The survival of volatile-rich atmospheres on close-in exoplanets challenges classical escape models. We identify a fully classical, interior-driven correction: thermoelastic contraction of the planetary mantle slightly increases the gravitational binding
L. Yıldız, D. Kaykı, E. Güdekli
doaj   +1 more source