Methyl formate ice stimulated by X-rays in protoplanetary discs

29th International Conference on Photonic, Electronic, and Atomic Collisions

Mendoza, Edgar^1,2 ; Wolff, Wania^3 ; Rocco, Maria Luiza^4 ; Boechat-Roberty, Heloisa^1

Observatório Do Valongo, Universidade Federal Do Rio de Janeiro, Rio de Janeiro, RJ

20080-090, Brazil^1

Institute de Astronomia, Geofísica e Ciências Atmosféricas, Universidade de São Paulo, São Paulo

SP, 05508-090, Brazil^2

Instituto de Física, Universidade Federal Do Rio de Janeiro, Rio de Janeiro, RJ

21941-909, Brazil^3

Instituto de Química, Universidade Federal Do Rio de Janeiro, Rio de Janeiro, RJ

21941-909, Brazil^4

关键词: Energy ranges;    Ice surfaces;    Ion yields;    Methyl formate;    Photo-desorption;    Soft X-ray;    TW Hydrae;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/635/10/102007/pdf
DOI  :  10.1088/1742-6596/635/10/102007

来源: IOP

【 摘 要 】

We study experimentally the processes of photoionization, photodissociation and photodesorption in methyl formate ice due to interaction of soft X-rays at two energy ranges, from 284 to 298 eV and from 528 to 546 eV, around the C ls→π∗and O ls→π∗resonances. The photodesorption ion yield was obtained for some of the desorbed species of the ice surface, like CH+, HCO+and H3CO+. The extrapolation of these results to an astrophysical environment, as the protoplanetary disc of TW Hydrae star, is presented.