Results 21 to 30 of about 1,923 (221)

ExoMDN: Rapid characterization of exoplanet interior structures with mixture density networks [PDF]

Astronomy & Astrophysics, 2023
Aims.Characterizing the interior structure of exoplanets is essential for understanding their diversity, formation, and evolution. As the interior of exoplanets is inaccessible to observations, an inverse problem must be solved, where numerical structure models need to conform to observable parameters such as mass and radius.
Baumeister, Philipp, Tosi, Nicola
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Constraining Exoplanet Structure and Composition: Linking Theory & Observations

, 2022
Since the discovery of first exoplanet by the end of the twentieth century, technological advancements have hugely extended our understanding of planetary systems.
Fernandez Otegi, Jon
core   +1 more source

Mineralogy, Structure, and Habitability of Carbon-Enriched Rocky Exoplanets: A Laboratory Approach [PDF]

Astrobiology, 2019
Carbon-enriched rocky exoplanets have been proposed around dwarf stars as well as around binary stars, white dwarfs and pulsars. However, the mineralogical make up of such planets is poorly constrained. We performed high-pressure high-temperature laboratory experiments ($P$ = 1$-$2 GPa, $T$ = 1523$-$1823 K) on carbon-enriched chemical mixtures to ...
Hakim, K., Spaargaren, R., Grewal, D.S., Rohrbach, A., Berndt, J., Dominik, C., van Westrenen, W.   +6 more
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Tentative Evidence for Water Vapor in the Atmosphere of the Neptune-sized Exoplanet HD 106315c

, 2022
We present a transmission spectrum for the Neptune-sized exoplanet HD 106315c from optical to infrared wavelengths based on transit observations from the Hubble Space Telescope/Wide Field Camera 3, K2, and Spitzer.
Molliere, Paul, Schlieder, Joshua E., Kawashima, Yui Kawashima, Howell, Steve B., Krick, Jessica E. K, Weiss, Lauren M., Ciardi, David R., Mikal-Evans, Thomas, Greene, Thomas P., Howard, Andrew W., Livingston, John H., Crossfield, Ian J. M., Christiansen, Jessie L., Berardo, David, Lothringer, Joshua D., Isaacson, Howard, Kosiarek, Molly R., Morley, Caroline V., Dragomir, Diana, Thorngren, Daniel P., Morales, Farisa Y., Petigura, Erik A., Fulton, Benjamin J., Gorjian, Varoujan, Dressing, Courtney D., Hardegree-Ullman, Kevin K, Rodriguez, Joseph E., Fortney, Jonathan J., Kreidberg, Laura, Benneke, Björn   +29 more
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Enhanced constraints on the interior composition and structure of terrestrial exoplanets [PDF]

Monthly Notices of the Royal Astronomical Society, 2018
Exoplanet interior modelling usually makes the assumption that the elemental abundances of a planet are identical to those of its host star. Host stellar abundances are good proxies of planetary abundances, but only for refractory elements. This is particularly true for terrestrial planets, as evidenced by the relative differences in bulk chemical ...
H S Wang, F Liu, T R Ireland, R Brasser, D Yong, C H Lineweaver   +5 more
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The Structure of Exoplanets

, 2013
The hundreds of exoplanets that have been discovered in the past two decades offer a new perspective on planetary structure. Instead of being the archetypal examples of planets, those of our Solar System are merely possible outcomes of planetary system formation and evolution, and conceivably not even terribly common outcomes (although this remains an ...
Spiegel, David S., Fortney, Jonathan J., Sotin, Christophe   +2 more
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A Stellar Mass Dependence of Structured Disks: A Possible Link with Exoplanet Demographics [PDF]

The Astronomical Journal, 2021
Abstract Gaps in protoplanetary disks have long been hailed as signposts of planet formation. However, a direct link between exoplanets and disks remains hard to identify. We present a large sample study of ALMA disk surveys of nearby star-forming regions to disentangle this connection.
Nienke van der Marel, Gijs D. Mulders
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Exoplanet Atmospheric Studies At High Spectral Resolution

, 2020
The study of exoplanet atmospheres is essential to understand the formation, evolution and composition of exoplanets. When a planet pass between its host star and an observer, a fraction of the star-light is absorbed by its atmosphere, thus revealing its
Allart, Romain
core   +1 more source

Using dimers to measure biosignatures and atmospheric pressure for terrestrial exoplanets

, 2014
We present a new method to probe atmospheric pressure on Earth-like planets using (O-O) dimers in the near-infrared. We also show that dimer features could be the most readily detectable biosignatures for Earth-like atmospheres and may even be detectable
Misra, A., Meadows, V., Claire, M., Crisp, D.   +3 more
core   +1 more source

TEMPERATURE STRUCTURE AND ATMOSPHERIC CIRCULATION OF DRY TIDALLY LOCKED ROCKY EXOPLANETS [PDF]

The Astrophysical Journal, 2016
ABSTRACT Next-generation space telescopes will observe the atmospheres of rocky planets orbiting nearby M-dwarfs. Understanding these observations will require well-developed theory in addition to numerical simulations. Here we present theoretical models for the temperature structure and atmospheric circulation of dry, tidally locked ...
Daniel D. B. Koll, Dorian S. Abbot
openaire   +3 more sources