  We present the study of the effects of high energy cosmic rays (CRs) over the
astrophysical ices, observed toward the embedded class I protostar Elias 29, by
using computational modeling and laboratory data. Its spectrum was observed
with {\it Infrared Space Observatory - ISO}, covering 2.3 - 190 $\mu$m. The
modeling employed the three-dimensional Monte Carlo radiative transfer code
RADMC-3D (Dullemond et al. 2012) and laboratory data of bombarded ice grains by
CRs analogs, and unprocessed ices (not bombarded). We are assuming that Elias
29 has a self-irradiated disk with inclination $i =$ 60$^{\circ}$, surrounded
by an envelope with bipolar cavity. The results show that absorption features
toward Elias 29, are better reproduced by assuming a combination between
unprocessed astrophysical ices at low temperature (H$_2$O, CO, CO$_2$) and
bombarded ices (H$_2$O:CO$_2$) by high energy CRs. Evidences of the ice
processing around Elias 29 can be observed by the good fitting around 5.5-8.0
$\mu$m, by polar and apolar ice segregation in 15.15-15.25 $\mu$m, and by
presence of the CH$_4$ and HCOOH ices. Given that non-nitrogen compounds were
employed in this work, we assume that absorption around 5.5-8.0 $\mu$m should
not be associated with NH$_4^+$ ion (Shutte & Khanna2003), but more probably
with aliphatic ethers (e.g. R1-OCH$_2$-R2), CH$_3$CHO and related species. The
results obtained in this paper are important, because they show that the
environment around protostars is better modeled considering processed samples
and, consequently, demonstrates the chemical evolution of the astrophysical
ices.
