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The formation of the building blocks of peptides on interstellar dust grains

Published online by Cambridge University Press:  12 October 2020

N. F. W. Ligterink Open the ORCID record for N. F. W. Ligterink [Opens in a new window] ,
J. Terwisscha van Scheltinga Open the ORCID record for J. Terwisscha van Scheltinga [Opens in a new window] ,
V. Kofman ,
V. Taquet ,
S. Cazaux ,
J. K. Jørgensen ,
E. F. van Dishoeck Open the ORCID record for E. F. van Dishoeck [Opens in a new window] ,
H. Linnartz Open the ORCID record for H. Linnartz [Opens in a new window]  and
The PILS team
N. F. W. Ligterink
Affiliation:
Center for Space and Habitability, University of Bern, Sidlerstrasse 5, CH-3012 Bern, Switzerland email: niels.ligterink@csh.unibe.ch Laboratory for Astrophysics, Leiden Observatory, Leiden University, PO Box 9513, 2300 RA Leiden, the Netherlands
J. Terwisscha van Scheltinga
Affiliation:
Laboratory for Astrophysics, Leiden Observatory, Leiden University, PO Box 9513, 2300 RA Leiden, the Netherlands
V. Kofman
Affiliation:
Laboratory for Astrophysics, Leiden Observatory, Leiden University, PO Box 9513, 2300 RA Leiden, the Netherlands
V. Taquet
Affiliation:
INAF-Osservatorio Astrofisico di Arcetri, Largo E. Fermi 5, I-50125, Florence, Italy
S. Cazaux
Affiliation:
Faculty of Aerospace Engineering, Delft University of Technology, NL-2629 HS Delft, the Netherlands
J. K. Jørgensen
Affiliation:
Centre for Star and Planet Formation, Niels Bohr Institute & Natural History Museum of Denmark, University of Copenhagen, Øster Voldgade 5–7, 1350 Copenhagen K., Denmark
E. F. van Dishoeck
Affiliation:
Leiden Observatory, Leiden University, PO Box 9513, 2300 RA Leiden, the Netherlands Max-Planck Institut für Extraterrestrische Physik (MPE), Giessenbachstr. 1, 85748 Garching, Germany
H. Linnartz
Affiliation:
Laboratory for Astrophysics, Leiden Observatory, Leiden University, PO Box 9513, 2300 RA Leiden, the Netherlands
Rights & Permissions [Opens in a new window]

Abstract

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The emergence of life on Earth may have its origin in organic molecules formed in the interstellar medium. Molecules with amide and isocyanate groups resemble structures found in peptides and nucleobases and are necessary for their formation. Their formation is expected to take place in the solid state, on icy dust grains, and is studied here by far-UV irradiating a CH4:HNCO mixture at 20 K in the laboratory. Reaction products are detected by means of infrared spectroscopy and temperature programmed desorption - mass spectrometry. Various simple amides and isocyanates are formed, showing the importance of ice chemistry for their interstellar formation. Constrained by experimental conditions, a reaction network is derived, showing possible formation pathways of these species under interstellar conditions.

Keywords

Astrochemistrymethods: laboratoryAstrobiology
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 15 , Symposium S350: Laboratory Astrophysics: From Observations to Interpretation , April 2019 , pp. 216 - 219
Copyright
© International Astronomical Union 2020

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