Laboratory IR Studies and Astrophysical Implications of C2H2-Containing Binary Ices

Details Laboratory IR Studies and Astrophysical Implications of C2H2-Containing Binary Ices Laboratory IR Studies and Astrophysical Implications of C2H2-Containing Binary Ices

Apr 2012

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2012apj...748...95k&link_type=abstract

The Astrophysical Journal, Volume 748, Issue 2, article id. 95 (2012).

Astronomy and Astrophysics

Astronomy

Infrared: Ism, Ism: Lines And Bands, Ism: Molecules, Methods: Laboratory

Scientific paper

Studies of molecular hot cores and protostellar environments have shown that the observed abundance of gas-phase acetylene (C2H2) cannot be matched by chemical models without the inclusion of C2H2 molecules subliming from icy grain mantles. Searches for infrared (IR) spectral features of solid-phase acetylene are under way, but few laboratory reference spectra of C2H2 in icy mixtures, which are needed for spectral fits to observational data, have been published. Here, we report a systematic study of the IR spectra of condensed-phase pure acetylene and acetylene in ices dominated by carbon monoxide (CO), carbon dioxide (CO2), methane (CH4), and water (H2O). We present new spectral data for these ices, including band positions and intrinsic band strengths. For each ice mixture and concentration, we also explore the dependence of acetylene's ν5-band position (743 cm-1, 13.46 μm) and FWHM on temperature. Our results show that the ν5 feature is much more cleanly resolved in ices dominated by non-polar and low-polarity molecules, specifically CO, CO2, and CH4, than in mixtures dominated by H2O-ice. We compare our laboratory ice spectra with observations of a quiescent region in Serpens.

Affiliated with

Also associated with

No associations

Rating

Laboratory IR Studies and Astrophysical Implications of C2H2-Containing Binary Ices does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Laboratory IR Studies and Astrophysical Implications of C2H2-Containing Binary Ices, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Laboratory IR Studies and Astrophysical Implications of C2H2-Containing Binary Ices will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1285359