A team combined compositional data of primitive bodies like Kuiper Belt objects, asteroids and comets with new solar data sets to develop a revised solar composition that potentially reconciles spectroscopy and helioseismology measurements for the first time.
A team combined compositional data of primitive bodies like Kuiper Belt objects, asteroids and comets with new solar data sets to develop a revised solar composition that potentially reconciles spectroscopy and helioseismology measurements for the first time.
Helioseismology probes the Sun's interior by analyzing the waves that travel through it, while spectroscopy reveals the surface composition based on the spectral signature produced by each chemical element. A Southwest Research Institute-led team combined compositional data of primitive bodies like Kuiper Belt objects, asteroids and comets with new solar data sets to develop a revised solar composition that potentially reconciles spectroscopy and helioseismology measurements for the first time. Helioseismology probes the Sun's interior by analyzing the waves that travel through it, while spectroscopy reveals the surface composition based on the spectral signature produced by each chemical element."This is the first time this kind of interdisciplinary analysis has been done, and our broad data set suggests more abundant levels of solar carbon, nitrogen and oxygen than previously thought," said Dr. Ngoc Truong, an SwRI postdoctoral researcher."Solar system formation models using the new solar composition successfully reproduce the compositions of large Kuiper Belt objects and carbonaceous chondrite meteorites, in light of the newly returned Ryugu and Bennu asteroid samples from JAXA's Hayabusa-2 and NASA's OSIRIS-REx missions." To make this discovery, the team combined new measurements of solar neutrinos and data about the solar wind composition from NASA's Genesis mission, together with the abundance of water found in primitive meteorites that originated in the outer solar system. They also used the densities of large KBOs such as Pluto and its moon Charon, as determined by NASA's New Horizons mission. "This work provides testable predictions for future helioseismology, solar neutrino and cosmochemical measurements, including future comet sample return missions," Truong said."The solar composition is used to calibrate other stars and understand the composition and formation of solar system objects. These breakthroughs will enhance our understanding of the primordial solar nebula's chemistry and the formation of numerous solar system bodies." The team examined the role of refractory, tar-like organic compounds as a major carrier of carbon in the protosolar nebula. Solar system formation models using measurements of organics from comet 67P/Churyumov-Gerasimenko and the most widely adopted solar composition ratios did not produce the dense, rocky Pluto-Charon system. "With this research, we think we finally understand the mix of chemical elements that made the solar system," said SwRI's Dr. Christopher Glein, an expert in planetary geochemistry."It has more carbon, nitrogen and oxygen than what is currently assumed. This new knowledge gives us a firmer basis for understanding what element abundances in giant planet atmospheres can tell us about the formation of planets. We already have our eyes on Uranus -- NASA's next target destination -- and beyond." In the search for habitable exoplanets, scientists measure the abundances of elements in stars spectroscopically to infer what a star's orbiting planets are made of, using stellar composition as a proxy for its planets. "Our findings will significantly affect our understanding about the formation and evolution of other stars and planetary systems, and even further, they enable a broader perspective of galactic chemical evolution," said Truong. A Cornell University-affiliated scientist contributed to the research, which was supported by SwRI's Internal Research and Development program and the Heising-Simons Foundation.A new paper presents findings about the Kuiper Belt Object 486958 Arrokoth, shedding new light on the preservation of volatile substances like carbon monoxide in such distant celestial bodies. The ... Asteroids offer valuable windows into the early solar system, given that they are remnants of planetary embryos that failed to form into planets. A recent analysis of samples from Ryugu offered ... Astronomers used NASA's James Webb Space Telescope to image the warm dust around a nearby young star, Fomalhaut, in order to study the first asteroid belt ever seen outside of our solar system ... In the search to discover the origins of our solar system, an international team including planetary scientists has compared the composition of the sun to the composition of the most ancient ...Storm in a Laser Beam: Physicists Create 'Light Hurricanes' That Could Transport Huge Amounts of Data
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