We study the evolution of phosphorous-bearing species in one-dimensional C-shock models. We find that the abundances of P-bearing species depend sensitively on the elemental abundance of P in the gas phase and on the abundance of N atoms in the pre-shock gas. The observed abundance of PN and the non-detection of PO towards L1157 B1 are reproduced in C-shock models with shock velocity v=20km s-1 and pre-shock density n(H2) =10^4 - 10^5, if the elemental abundance of P in the gas phase is 10^-9 and the N-atom abundance is n(N)/nH - 10^-5 in the pre-shock gas. We also find that P-chemistry is sensitive to O- and N-chemistry, because N atoms are destroyed mainly by OH and NO. We identify the reactions of O-bearing and N-bearing species that significantly affect P chemistry.
@article{arxiv.1210.7900,
title = {Phosphorous chemistry in the shocked region L1157 B1},
author = {Takuhiro Aota and Yuri Aikawa},
journal= {arXiv preprint arXiv:1210.7900},
year = {2015}
}
Comments
23pages, 12 figure, accepted for publication in ApJ