Thermal behavior of astrophysical amorphous molecular ices.

Gudipati, Murthy S; Fleury, Benjamin; Wagner, Robert; Henderson, Bryana L; Altwegg, Kathrin; Rubin, Martin (2023). Thermal behavior of astrophysical amorphous molecular ices. Faraday Discussions, 245, pp. 467-487. Royal Society of Chemistry 10.1039/d3fd00048f

[img] Text
d3fd00048f.pdf - Published Version
Restricted to registered users only
Available under License Publisher holds Copyright.

Download (4MB)

Ice is a major component of astrophysical environments - from interstellar molecular clouds through protoplanetary disks to evolved solar systems. Ice and complex organic matter coexist in these environments as well, and it is thought primordial ice brought the molecules of life to Earth four billion years ago, which could have kickstarted the origin of life on Earth. To understand the journey of ice and organics from their origins to becoming a part of evolved planetary systems, it is important to complement high spatial and spectral resolution telescopes such as JWST with laboratory experimental studies that provide deeper insight into the processes that occur in these astrophysical environments. Our laboratory studies are aimed at providing this knowledge. In this article we present simultaneous mass spectrometric and infrared spectroscopic investigation on how molecular ice mixtures behave at different temperatures and how this information is critical to interpret observational data from protoplanetary disks as well as comets. We find that amorphous to crystalline water ice transformation is the most critical phenomenon that differentiates between outgassing of trapped volatiles such as CO2vs. outgassing of pure molecular ice domains of the same in a mixed molecular ice. Crystalline water ice is found to trap only a small fraction of other volatiles (<5%), indicating ice grain composition in astrophysical and planetary environments must be different depending on whether the ice is in amorphous phase or transformed into crystalline phase, even if the crystalline ice undergoes radiation-induced amorphization subsequently. Crystallization of water ice is a key differentiator for many ices in astronomical environments as well as in our Solar System.

Item Type:

Journal Article (Original Article)

Division/Institute:

08 Faculty of Science > Physics Institute > Space Research and Planetary Sciences

UniBE Contributor:

Altwegg, Kathrin, Rubin, Martin

Subjects:

500 Science > 520 Astronomy
600 Technology > 620 Engineering

ISSN:

1364-5498

Publisher:

Royal Society of Chemistry

Language:

English

Submitter:

Pubmed Import

Date Deposited:

21 Jun 2023 16:29

Last Modified:

21 Sep 2023 00:13

Publisher DOI:

10.1039/d3fd00048f

PubMed ID:

37341061

BORIS DOI:

10.48350/183591

URI:

https://boris.unibe.ch/id/eprint/183591

Actions (login required)

Edit item Edit item
Provide Feedback