Rocky planet compositions regulate planetary evolution by affecting core sizes, mantle properties, and melting behaviours. Yet, quantitative treatments of this aspect exoplanet studies remain generally under-explored. We attempt to constrain the range potential bulk terrestrial in solar neighbourhood (<200 pc). circumscribe probable rocky based on a population analysis stellar chemical abundances from Hypatia GALAH catalogues. apply devolatilization model simulate hypothetical,...

Aims: The secondary atmospheres of terrestrial planets form and evolve as a consequence interaction with the interior over geological time. We aim to quantify influence planetary bulk composition on interior--atmosphere evolution for Earth-sized aid in interpretation future observations exoplanet atmospheres. Methods: used geochemical model determine major-element interiors (MgO, FeO, SiO2) following crystallization magma ocean after planet formation, predicting compositional profile an...

Observations of several short-period rocky exoplanets (e.g., LHS 3844 b, TRAPPIST-1 GJ 367 b) suggest that they do no host substantial secondary atmospheres, which makes their surfaces directly accessible to spectral characterisation. Various minerals and rock types have potentially distinguishable surface reflectance spectra, allowing for observational characterisation geology such atmosphere-less exoplanets. While extensive spectra Solar System lithologies are available, may not capture...

Stars in the solar neighbourhood have refractory element ratios slightly different from Sun. It is unclear how much condensation of solids and thus composition planets forming around these stars affected. We aim to understand impact changing elements Mg, Si, Fe within range observed type 150~pc on them. use GGchem code simulate protoplanetary disks with a Minimum Mass Solar Nebula main sequence G-type neighbourhood. extract stellar elemental Hypatia database. find that lower Mg/Si ratio...

Carbon-enriched rocky exoplanets have been proposed to occur around dwarf stars as well 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 chemical mixtures representative C-enriched based calculations protoplanetary disk compositions. These P-T conditions correspond deep interiors Pluto- Mars-sized upper mantles larger planets....

Based on stellar compositions, we know that rocky exoplanets show a diversity in interior and therefore mantle mineralogies. The mineralogy controls physical parameters of the mantle, such as viscosity, strongly affects thermal dynamical evolution interior. However, it is unknown whether plays role establishing planets surface dynamic regime (e.g., mobile lid, stagnant episodic lid), which pivotal determining planets&amp;#8217; habitability. Here, investigate long-term Earth-sized with range...

Rocky planet compositions regulate planetary evolution by affecting core sizes, mantle properties, and melting behaviours. Yet, quantitative treatments of this aspect exoplanet studies remain generally under-explored. We attempt to constrain the range potential bulk terrestrial in solar neighbourhood (&lt;200 pc). circumscribe probable rocky based on a population analysis stellar chemical abundances from Hypatia GALAH catalogues. apply devolatilization model simulate hypothetical,...

&amp;lt;p&amp;gt;One of the main goals Exoplanetary Sciences is to reconcile our theoretical knowledge terrestrial exoplanet systems with observations. To reach this goal, interaction between it and planetary interior needs be studied, since atmosphere only observable part a exoplanet. This atmosphere-interior depends on properties interior, many which are directly (density, viscosity) or indirectly (thermal evolution, layering) affected by bulk composition planet. In order better understand...

AbstractWith more observations of terrestrial exoplanets becoming available every year, the importance geodynamical studies focusing on is increasing. We know from that stellar chemical abundances vary in Solar neighbourhood, which likely to result with a similar diversity. Bulk planet composition affects many properties interior directly (e.g., core size, mantle viscosity) or indirectly thermal evolution, layering). This may extend atmospheric properties, since atmospheres form and evolve...

&amp;lt;p&amp;gt;Our knowledge of the physical, chemical, and mechanical (i.e., rheological) properties terrestrial planets is based almost entirely on our Solar System. Terrestrial exoplanets, however, show a startling diversity compared to local experience. This observation challenges understanding planet formation thermal behaviour such worlds, some which are vastly different from own. To better understand range consequences exoplanetary diversity, we integrate results astrophysical...

Abundance patterns ranging from (ultra-)refractory (e.g. W, Zr, Al, Ca and Rare Earth Elements), to moderately volatile Li, K Na) highly Zn, Cl, Br, I In) lithophile elements show a broadly &amp;#8216;hockey stick&amp;#8217; element depletion trend for Mars [1,2]. This is because refractory abundances relative solar composition normalized Mg or Al [3] are weakly affected by devolatilization processes but the describe factor with particular slope (&amp;#945;). Volatile 50% condensation...

Terrestrial planets evolve through multiple magma-ocean stages during accretion and differentiation. Magma oceans become progressively enriched upon fractional crystallization (FC), which should be dominant at least in the upper mantle. The resulting upwards enrichment of cumulate package drives gravitational overturn(s), ultimately stabilizes a FeO- SiO2-enriched basal magma ocean (BMO) [1]. Alternatively, ~pyrolitic BMO may formed due to liquid-solid density crossover high pressures [2,3]....

New terrestrial exoplanets are being discovered at an ever faster pace, and each discovery leads to a widening of our understanding planetary diversity. A key aspect in the quest better quantify planet diversity is gain information on plausible bulk compositions, as this physical-chemical quantity determines planet's structure, which turn controls physical properties its layers (core, mantle, crust, atmosphere). Recent insights expected range compositions allow us investigate how fundamental...

&amp;lt;div&amp;gt; &amp;lt;p&amp;gt;&amp;lt;span&amp;gt;The study of exoplanets can provide a more general understanding planetary systems and terrestrial-planet evolution. How terrestrial differ from Earth has so far mostly focused on planet size orbital distance. In contrast, bulk composition gained much less attention, even though it controls key physical properties interiors, thus interior dynamics long-term Bulk is related to core as well mantle chemistry mineralogy. To better...

&amp;lt;p&amp;gt;&amp;lt;strong&amp;gt;Introduction&amp;lt;/strong&amp;gt;&amp;lt;br /&amp;gt;The catalog of known exoplanets has increased vastly since the first detection in 1995. In era JWST, this is expected to grow even further, and especially fraction terrestrial will due enhanced capabilities next-generation instruments compared its predecessors. Due limited observation time with such as target selection an important process, for difficult-to-observe planets. This process can be...

AbstractWe aim to understand the impact of different refractory element ratios such as Mg, Si, and Fe on composition planets. We use thermodynamic equilibrium code GGchem simulate condensation solids in a minimum mass solar nebula around main sequence G-type stars within 150pc. extract stellar elemental from Hypatia database. find that lower Mg/Si ratio shifts forsterite SiO enstatite quartz; Fe/S leads formation FeS FeS2 little or no Fe-bearing silicates. Ratios elements translate directly...