Počet záznamů: 1
Dust Motions in Magnetized Turbulence: Source of Chemical Complexity
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SYSNO ASEP 0501708 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název Dust Motions in Magnetized Turbulence: Source of Chemical Complexity Tvůrce(i) Cassone, Giuseppe (BFU-R) ORCID
Saija, F. (IT)
Šponer, Jiří (BFU-R) RID, ORCID
Šponer, Judit E. (BFU-R) RID, ORCID
Ferus, Martin (UFCH-W) ORCID, RID
Krůs, Miroslav (UFP-V) RID
Ciaravella, A. (IT)
Jimenez-Escobar, A. (IT)
Cecchi-Pestellini, C. (IT)Celkový počet autorů 9 Číslo článku L23 Zdroj.dok. Astrophysical Journal Letters. - : Institute of Physics Publishing - ISSN 2041-8205
Roč. 866, č. 2 (2018)Poč.str. 9 s. Forma vydání Online - E Jazyk dok. eng - angličtina Země vyd. US - Spojené státy americké Klíč. slova grain-grain collisions ; gas-phase formation ; molecule formamide ; interstellar Vědní obor RIV BN - Astronomie a nebeská mechanika, astrofyzika Obor OECD Astronomy (including astrophysics,space science) Vědní obor RIV – spolupráce Ústav fyzikální chemie J.Heyrovského - Astronomie a nebeská mechanika, astrofyzika
Ústav fyziky plazmatu - Astronomie a nebeská mechanika, astrofyzikaCEP GA17-05076S GA ČR - Grantová agentura ČR Institucionální podpora BFU-R - RVO:68081707 ; UFCH-W - RVO:61388955 ; UFP-V - RVO:61389021 UT WOS 000448105300002 DOI 10.3847/2041-8213/aae529 Anotace In addition to the manufacture of complex organic molecules from impacting cometary and icy planet surface analogs, which is well-established, dust grain-grain collisions driven by turbulence in interstellar or circumstellar regions may represent a parallel chemical route toward the shock synthesis of prebiotically relevant species. Here we report on a study, based on the multi-scale shock-compression technique combined with ab initio molecular dynamics approaches, where the shock-wave-driven chemistry of mutually colliding isocyanic acid (HNCO) containing icy grains has been simulated by first principles. At the shock-wave velocity threshold triggering the chemical transformation of the sample (7 km s(-1)), formamide is the first synthesized species, thus being the springboard for the further complexification of the system. Also, upon increasing the shock impact velocity, formamide is formed in progressively larger amounts. More interestingly, at the highest velocity considered (10 km s(-1)), impacts drive the production of diverse carbon-carbon bonded species. In addition to glycine, the building block of alanine (i.e., ethanimine) and one of the major components of a plethora of amino acids including, e.g., asparagine, cysteine, and leucine (i.e., vinylamine), have been detected after shock compression of samples containing the most widespread molecule in the universe (H-2) and the simplest compound bearing all of the primary biogenic elements (HNCO). The present results indicate novel chemical pathways toward the chemical complexity typical of interstellar and circumstellar regions. Pracoviště Biofyzikální ústav Kontakt Jana Poláková, polakova@ibp.cz, Tel.: 541 517 244 Rok sběru 2019
Počet záznamů: 1