دانلود مقاله ISI انگلیسی شماره 138027
ترجمه فارسی عنوان مقاله

انرژی های اتصال: ارزش های جدید و تأثیر در کارایی رسوب شیمیایی

عنوان انگلیسی
Binding energies: New values and impact on the efficiency of chemical desorption
کد مقاله سال انتشار تعداد صفحات مقاله انگلیسی
138027 2017 14 صفحه PDF
منبع

Publisher : Elsevier - Science Direct (الزویر - ساینس دایرکت)

Journal : Molecular Astrophysics, Volume 6, March 2017, Pages 22-35

پیش نمایش مقاله
پیش نمایش مقاله  انرژی های اتصال: ارزش های جدید و تأثیر در کارایی رسوب شیمیایی

چکیده انگلیسی

Recent laboratory measurements have confirmed that chemical desorption (desorption of products due to exothermic surface reactions) can be an efficient process. The impact of including this process into gas-grain chemical models entirely depends on the formalism used and the associated parameters. Among these parameters, binding energies are probably the most uncertain ones for the moment. We propose a new model to compute binding energy of species to water ice surfaces. We have also compared the model results using either the new chemical desorption model proposed by Minissale et al. (2016) or the one of Garrod et al. (2007). The new binding energies have a strong impact on the formation of complex organic molecules. In addition, the new chemical desorption model from Minissale produces a much smaller desorption of these species and also of methanol. Combining the two effects, the abundances of CH3OH and COMs observed in cold cores cannot be reproduced by astrochemical models anymore.