Ma ratio a kuchuluka kwa ma isomers a COM omwe adawonedwa mu ISM amapereka chidziwitso chofunikira chokhudza chemistry ndi physics ya mpweya, ndipo pamapeto pake, mbiri ya mtambo wa mamolekyu.
Kuchuluka kwa asidi wa c-HCOOH mu cold core ndi 6% yokha ya kuchuluka kwa isomer ya c-HCOOH, yomwe chiyambi chake sichikudziwika. Apa tikufotokoza za kukhalapo kwa c-HCOOH mu mitambo yakuda ya mamolekyu chifukwa cha kuwonongeka ndi kukana mapangidwe a c-HCOOH ndi t-HCOOH panthawi yozungulira HCOOH ndi mamolekyu ambiri monga HCO+ ndi NH3.
Tinagwiritsa ntchito njira yapamwamba ya ab initio kuti tiwerengere momwe mphamvu ingagawidwire ya c-HCOOH ndi njira zosinthira/kupanga kwa t-HCOOH. Zokhazikika za global rate ndi zinthu zogawa zinawerengedwa kutengera chiphunzitso cha kusintha kwa zinthu ndi mawonekedwe a master equation pansi pa mikhalidwe yachizolowezi ya ISM.
Kuwonongeka kwa HCOOH chifukwa cha kuchitapo kanthu ndi HCO+ mu gawo la mpweya kumabweretsa ma isomers atatu a HC(OH)2+ cation. Ma cations ofala kwambiri amatha kuchitapo kanthu ndi mamolekyu ena odziwika bwino a ISM monga NH3 mu gawo lachiwiri kuti abwerere ku 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 6% yomwe yawonedwa, tikupereka lingaliro loganizira njira zina zowonongera 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 idzasintha momwe tidapangira pansi pa mitambo yakuda ya mamolekyulu. Iyi ndi njira yatsopano mkati mwa isomerization ya mamolekyulu achilengedwe mu ISM, mwina kuyesa kufotokoza ubale womwe ulipo pakati pa ma isomer a mamolekyulu achilengedwe omwe amapezeka mu ISM.
John Garcia, Isascun Jimenez-Serra, Jose Carlos Corchado, Germaine Molpeceres, Antonio Martinez-Henares, Victor M. Rivilla, Laura Colzi, Jesus Martin-Painted
Mutu: Galactic Astrophysics (astro-ph.GA), Chemical Physics (physics.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/2301.07450Astrobiology, astrochemistry
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