Ma ratio omwe awonedwa a ma isomers a COM mu ISM amapereka chidziwitso chofunikira chokhudza chemistry ndi physics ya mpweya, ndipo pamapeto pake, mbiri ya mitambo yamamolekyu.
Kuchuluka kwa asidi wa c-HCOOH mu cold core ndi 6% yokha ya zomwe zili mu c-HCOOH isomer, ndipo chiyambi chake sichikudziwika. Apa tikufotokoza za kukhalapo kwa c-HCOOH mu mitambo yakuda ya mamolekyu chifukwa cha kuwonongedwa ndi kuchepetsedwa kwa c-HCOOH ndi t-HCOOH panthawi yozungulira HCOOH ndi mamolekyu ambiri monga HCO+ ndi NH3.
Tinagwiritsa ntchito njira yowonjezera ya ab initio kuti tiwerengere momwe mphamvu ingagawidwire pa c-HCOOH ndi t-HCOOH. Zosasinthika za Global rate ndi zinthu zogawa zinawerengedwa kutengera chiphunzitso cha transition state ndi mawonekedwe a master equation pansi pa mikhalidwe yachizolowezi ya ISM.
HCOOH imawonongeka ikakumana ndi HCO+ mu gawo la mpweya kuti ipange ma isomer atatu a HC(OH)2+ cation. Ma cations ofala kwambiri amatha kuchitapo kanthu ndi mamolekyu ena ofala mu ISM, monga NH3, mu gawo lachiwiri losinthira c-HCOOH ndi t-HCOOH. Njirayi ikufotokoza kupangika kwa c-HCOOH mu mitambo yakuda ya mamolekyu. Poganizira njira iyi, gawo la c-HCOOH poyerekeza ndi t-HCOOH linali 25.7%.
Kuti tifotokoze zomwe zanenedwa kuti 6% ya zomwe zawonedwa, tikupereka lingaliro loganizira njira yowonjezera yowonongera cation ya HCOOH. Njira yotsatizana ya acid-base (SAB) yomwe yaperekedwa mu ntchitoyi ikuphatikizapo njira yachangu ya mamolekyu yomwe imapezeka kwambiri mu ISM.
Chifukwa chake, HCOOH mwina idzadutsa mu kusintha komwe tidapereka pansi pa mikhalidwe yamdima ya mamolekyulu. Iyi ndi njira yatsopano mkati mwa isomerism ya mamolekyulu achilengedwe mu ISM, yomwe ingayese kufotokoza ubale womwe ulipo pakati pa ma isomer a mamolekyulu achilengedwe omwe amapezeka mu ISM.
John Garcia, Isascen Jimenez-Serra, Jose Carlos Colchado, Germaine Morpeceres, Antonio Martinez-Henares, Victor M. Rivera, Laura Corzi, Jesus Martin-Painde
Mitu: Galactic Astrophysics (astro-ph.GA), Chemical Physics (physical.chem-ph) Yotchulidwa motere: arXiv:2301.07450 [astro-ph.GA] (kapena mtundu uwu arXiv:2301.07450v1 [astro-ph.GA] ) Mbiri yoperekedwa ndi: Juan Garcia de la Concepción [v1] Lachitatu 18 Januwale 2023 11:45:25 UTC (1909 KB) https://arxiv.org/abs/2301.07450 Astrobiology, astrochemistry
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