TY - GEN
T1 - Soft X-ray Irradiation of Ice Analogues
T2 - European Conference on Laboratory Astrophysics, ECLA 2020
AU - Ciaravella, Angela
AU - Cecchi-Pestellini, Cesare
AU - Jiménez Escobar, Antonio
AU - Chen, Y. J.
AU - Muñoz-Caro, G.
N1 - Publisher Copyright:
© 2023, The Author(s), under exclusive license to Springer Nature Switzerland AG.
PY - 2023
Y1 - 2023
N2 - Interstellar ice is a remarkable material: it enables a dramatic chemical transformation to take place in the interstellar medium. This transformation converts relatively simple chemical species (such as CO, H 2 O, and NH 3 ) into some that are relatively complex. In the environments of solar-type stars, the intense soft X-ray irradiation impacts significantly on disc evolution, and must affect the physical and chemical structure of circumstellar ices. The effects of soft X-rays have been studied in dedicated experiments, which have largely demonstrated that X-rays can contribute to efficient organic chemistry. We discuss soft X-rays processing of layered ices composed of a H 2 O:CH 4 :NH 3 mixture, covered by a mixture of CH 3 OH and CO. Irradiation of layered ice with isotopologues of methane 13 CH 4 and ammonia 15 NH 3 have been used to interpret the contribution from both layers to the detected volatiles species during irradiation. Bulk diffusion occurs in the ice under irradiation.
AB - Interstellar ice is a remarkable material: it enables a dramatic chemical transformation to take place in the interstellar medium. This transformation converts relatively simple chemical species (such as CO, H 2 O, and NH 3 ) into some that are relatively complex. In the environments of solar-type stars, the intense soft X-ray irradiation impacts significantly on disc evolution, and must affect the physical and chemical structure of circumstellar ices. The effects of soft X-rays have been studied in dedicated experiments, which have largely demonstrated that X-rays can contribute to efficient organic chemistry. We discuss soft X-rays processing of layered ices composed of a H 2 O:CH 4 :NH 3 mixture, covered by a mixture of CH 3 OH and CO. Irradiation of layered ice with isotopologues of methane 13 CH 4 and ammonia 15 NH 3 have been used to interpret the contribution from both layers to the detected volatiles species during irradiation. Bulk diffusion occurs in the ice under irradiation.
KW - Laboratory astrochemistry
KW - Protoplanetary disks
KW - X-rays
UR - http://www.scopus.com/inward/record.url?scp=85172420943&partnerID=8YFLogxK
U2 - 10.1007/978-3-031-29003-9_25
DO - 10.1007/978-3-031-29003-9_25
M3 - 會議論文篇章
AN - SCOPUS:85172420943
SN - 9783031290022
T3 - Astrophysics and Space Science Proceedings
SP - 223
EP - 227
BT - European Conference on Laboratory Astrophysics ECLA2020 - The Interplay of Dust, Ice, and Gas in Space
A2 - Mennella, Vito
A2 - Joblin, Christine
PB - Springer Science and Business Media B.V.
Y2 - 26 September 2021 through 1 October 2021
ER -