naa a22 4500 510732747 CHVBK 20180411082958.0 cr unu---uuuuu 180411e20131101xx s 000 0 eng 10.1134/S1063772913110036 doi (NATIONALLICENCE)springer-10.1134/S1063772913110036 Modeling of the formation of complex molecules in protostellar objects [Elektronische Daten] [O. Kochina, D. Wiebe, S. Kalenskii, A. Vasyunin] The results of molecular composition modeling are presented for the well studied low-mass star-forming region TMC-1 and the massive star-forming region DR21(OH), which is poorly studied from a chemical point of view. The column densities of dozens of molecules, ranging from simple diatomic to complex organic molecules, are reproduced to within an order of magnitude using a one-dimensional model for the physical and chemical structure of these regions. The chemical ages of the regions are approximately 105 years in both cases. The main desorption mechanisms that are usually included in chemical models (photodesorption, thermal desorption, and cosmic-ray-induced desorption) do not provide sufficient gasphase abundances of molecules that are synthesized in surface reactions; however, this shortcoming can be removed by introducing small amount of reactive desorption into the model. It is possible to reproduce the properties of the TMC-1 chemical composition in a standard model, without requiring additional assumptions about an anomalous C/O ratio or the recent accretion of matter enriched with atomic carbon, as has been proposed by some researchers. Pleiades Publishing, Ltd., 2013 Kochina O. Institute of Astronomy, Russian Academy of Sciences, 48 Pyatnitskaya St., 119017, Moscow, Russia aut Wiebe D. Institute of Astronomy, Russian Academy of Sciences, 48 Pyatnitskaya St., 119017, Moscow, Russia aut Kalenskii S. Astro Space Center, Lebedev Physical Institute, Russian Academy of Sciences, Pushchino, Moscow oblast, Russia aut Vasyunin A. Department of Astronomy, University of Virginia, Charlottesville, USA aut Astronomy Reports Springer US; http://www.springer-ny.com 57/11(2013-11-01), 818-832 1063-7729 57:11<818 2013 57 11444 https://doi.org/10.1134/S1063772913110036 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1134/S1063772913110036 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Kochina O. Institute of Astronomy, Russian Academy of Sciences, 48 Pyatnitskaya St., 119017, Moscow, Russia aut NATIONALLICENCE 700 1- Wiebe D. Institute of Astronomy, Russian Academy of Sciences, 48 Pyatnitskaya St., 119017, Moscow, Russia aut NATIONALLICENCE 700 1- Kalenskii S. Astro Space Center, Lebedev Physical Institute, Russian Academy of Sciences, Pushchino, Moscow oblast, Russia aut NATIONALLICENCE 700 1- Vasyunin A. Department of Astronomy, University of Virginia, Charlottesville, USA aut NATIONALLICENCE 773 0- Astronomy Reports Springer US; http://www.springer-ny.com 57/11(2013-11-01), 818-832 1063-7729 57:11<818 2013 57 11444 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer