Search Results - "USUI, Tomohiro"
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Searching for life on Mars and its moons
Published in Science (American Association for the Advancement of Science) (13-08-2021)“…Sample-return missions will look for extraterrestrial life and biomarkers on Mars and Phobos The scientific exploration of Mars over the past several decades…”
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A lower limit of atmospheric pressure on early Mars inferred from nitrogen and argon isotopic compositions
Published in Icarus (New York, N.Y. 1962) (01-01-2018)“…•Isotopic composition of early atmosphere recorded in ALH 84001 has been reported.•Taking escape/replenishment processes into account, atmospheric evolution is…”
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The Importance of Phobos Sample Return for Understanding the Mars-Moon System
Published in Space science reviews (01-06-2020)“…Phobos and Deimos occupy unique positions both scientifically and programmatically on the road to the exploration of the solar system. Japan Aerospace…”
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Martian moons exploration MMX: sample return mission to Phobos elucidating formation processes of habitable planets
Published in Earth, planets, and space (20-01-2022)“…Martian moons exploration, MMX, is the new sample return mission planned by the Japan Aerospace Exploration Agency (JAXA) targeting the two Martian moons with…”
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Membraneless polyester microdroplets as primordial compartments at the origins of life
Published in Proceedings of the National Academy of Sciences - PNAS (06-08-2019)“…Compartmentalization was likely essential for primitive chemical systems during the emergence of life, both for preventing leakage of important components,…”
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In-situ preservation of nitrogen-bearing organics in Noachian Martian carbonates
Published in Nature communications (24-04-2020)“…Understanding the origin of organic material on Mars is a major issue in modern planetary science. Recent robotic exploration of Martian sedimentary rocks and…”
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Divergent Nematic Susceptibility near the Pseudogap Critical Point in a Cuprate Superconductor
Published in Journal of the Physical Society of Japan (15-06-2020)Get full text
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Subduction and atmospheric escape of Earth's seawater constrained by hydrogen isotopes
Published in Earth and planetary science letters (01-09-2018)“…The hydrogen isotopic (D/H) ratio reflects the global cycling and evolution of water on Earth as it fractionates through planetary processes. We model the…”
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Transport of impact ejecta from Mars to its moons as a means to reveal Martian history
Published in Scientific reports (27-12-2019)“…Throughout the history of the solar system, Mars has experienced continuous asteroidal impacts. These impacts have produced impact-generated Mars ejecta, and a…”
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Uracil in the carbonaceous asteroid (162173) Ryugu
Published in Nature communications (21-03-2023)“…The pristine sample from the near-Earth carbonaceous asteroid (162173) Ryugu collected by the Hayabusa2 spacecraft enabled us to analyze the pristine…”
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Special issue “Martian Moons eXploration: the scientific investigations of Mars and its moons”
Published in Earth, planets, and space (01-12-2024)Get full text
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Experimental evidence of phase transition of silica polymorphs in basaltic eucrites: implications for thermal history of protoplanetary crust
Published in Scientific reports (02-11-2024)“…Silica polymorphs occur under various pressures and temperature conditions, and their characteristics can be used to better understand the complex metamorphic…”
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In situ science on Phobos with the Raman spectrometer for MMX (RAX): preliminary design and feasibility of Raman measurements
Published in Earth, planets, and space (19-12-2021)“…Mineralogy is the key to understanding the origin of Phobos and its position in the evolution of the Solar System. In situ Raman spectroscopy on Phobos is an…”
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Survey of impact glasses in shergottites searching for Martian sulfate using X-ray absorption near-edge structure
Published in Geochimica et cosmochimica acta (15-11-2021)“…The surface of Mars has experienced progressive oxidation, resulting in the formation of sulfate minerals as evidenced from surface exploration missions…”
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Origin of water and mantle–crust interactions on Mars inferred from hydrogen isotopes and volatile element abundances of olivine-hosted melt inclusions of primitive shergottites
Published in Earth and planetary science letters (01-12-2012)“…Volatile elements have influenced the differentiation and eruptive behavior of Martian magmas and played an important role in the evolution of Martian climate…”
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Insights into the formation and evolution of extraterrestrial amino acids from the asteroid Ryugu
Published in Nature communications (17-03-2023)“…All life on Earth contains amino acids and carbonaceous chondrite meteorites have been suggested as their source at the origin of life on Earth. While many…”
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Water and Volatile Inventories of Mercury, Venus, the Moon, and Mars
Published in Space science reviews (01-08-2018)“…We review the geochemical observations of water, D / H and volatile element abundances of the inner Solar System bodies, Mercury, Venus, the Moon, and Mars. We…”
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Chondrule-like objects and Ca-Al-rich inclusions in Ryugu may potentially be the oldest Solar System materials
Published in Nature communications (16-02-2023)“…Chondrule-like objects and Ca-Al-rich inclusions (CAIs) are discovered in the retuned samples from asteroid Ryugu. Here we report results of oxygen isotope,…”
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Surface environment of Phobos and Phobos simulant UTPS
Published in Earth, planets, and space (10-12-2021)“…The Martian Moons eXploration (MMX) mission will study the Martian moons Phobos and Deimos, Mars, and their environments. The mission scenario includes both…”
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Alternate oscillations of Martian hydrogen and oxygen upper atmospheres during a major dust storm
Published in Nature communications (03-11-2022)“…Dust storms on Mars play a role in transporting water from its lower to upper atmosphere, seasonally enhancing hydrogen escape. However, it remains unclear how…”
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