The chemical evolution of the solar neighbourhood for planet-hosting stars

Autor: Pignatari, Marco, Trueman, Thomas C. L., Womack, Kate A., Gibson, Brad K., Côté, Benoit, Turrini, Diego, Sneden, Christopher, Mojzsis, Stephen J., Stancliffe, Richard J., Fong, Paul, Lawson, Thomas V., Keegans, James D., Pilkington, Kate, Passy, Jean-Claude, Beers, Timothy C., Lugaro, Maria

Theoretical physical-chemical models for the formation of planetary systems depend on data quality for the Sun's composition, that of stars in the solar neighbourhood, and of the estimated "pristine" compositions for stellar systems. The effective sc

Externí odkaz: http://arxiv.org/abs/2307.12330

Detailed chemical compositions of planet-hosting stars: II. Exploration of the interiors of terrestrial-type exoplanets

Autor: Wang, Haiyang S., Quanz, Sascha P., Yong, David, Liu, Fan, Seidler, Fabian, Acuña, Lorena, Mojzsis, Stephen J.

A major goal in the discovery and characterisation of exoplanets is to identify terrestrial-type worlds that are similar to (or otherwise distinct from) our Earth. Recent results have highlighted the importance of applying devolatilisation -- i.e. de

Externí odkaz: http://arxiv.org/abs/2204.09558

A model Earth-sized planet in the habitable zone of $\alpha$ Centauri A/B

Autor: Wang, Haiyang S., Lineweaver, Charles H., Quanz, Sascha P., Mojzsis, Stephen J., Ireland, Trevor R., Sossi, Paolo A., Seidler, Fabian, Morel, Thierry

The bulk chemical composition and interior structure of rocky exoplanets are of fundamental importance to understanding their long-term evolution and potential habitability. Observations of the chemical compositions of the solar system rocky bodies a

Externí odkaz: http://arxiv.org/abs/2110.12565

Europium as a lodestar: diagnosis of radiogenic heat production in terrestrial exoplanets

Autor: Wang, Haiyang S., Morel, Thierry, Quanz, Sascha P., Mojzsis, Stephen J.

Publikováno v: A&A 644, A19 (2020)

Long-lived radioactive nuclides, such as $^{40}$K, $^{232}$Th, $^{235}$U and $^{238}$U, contribute to persistent heat production in the mantle of terrestrial-type planets. As refractory elements, the concentrations of Th and U in a terrestrial exopla

Externí odkaz: http://arxiv.org/abs/2010.04632

When did Life Likely Emerge on Earth in an RNA-First Process?

Autor: Benner, Steven A., Bell, Elizabeth A., Biondi, Elisa, Brasser, Ramon, Carell, Thomas, Kim, Hyo-Joong, Mojzsis, Stephen J., Omran, Arthur, Pasek, Matthew A., Trail, Dustin

Publikováno v: 19. Benner, S.A., Bell, E.A., Biondi, E., Brasser, R., Carell, T., Kim, H-J., Mojzsis, S.J., Omran, A., Pasek, M.A., and Trail, D. (2020) When did Life Likely Emerge on Earth in an RNA-First Process? ChemSystemsChem 2, e1900035

The widespread presence of ribonucleic acid (RNA) catalysts and cofactors in Earth's biosphere today suggests that RNA was the first biopolymer to support Darwinian evolution. However, most "path-hypotheses" to generate building blocks for RNA requir

Externí odkaz: http://arxiv.org/abs/1908.11327