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Detection of Abundant CO2 Ice in the Quiescent Dark Cloud Medium toward Elias 16Based on observations with Infrared Space Observatory, a European Space Agency (ESA) project, with instruments funded by ESA Member States (especially the PI countries France, Germany, The Netherlands, and the UK) and with the participation of ISAS and NASA.

Authors
  • Dcb, Whittet
  • P A, Gerakines
  • Aggm, Tielens
  • A J, Adamson
  • Aca, Boogert
  • Jean Chiar
  • Th, De Graauw
  • P, Ehrenfreund
  • T, Prusti
  • W A, Schutte
  • Bart, Vandenbussche
  • E F, Van Dishoeck
Type
Published Article
Journal
The Astrophysical Journal Letters
Publication Date
Apr 19, 1998
Volume
498
Issue
2
Pages
159–159
Source
SETI Institute
License
Unknown

Abstract

We report the first detection of solid carbon dioxide (CO 2) in quiescent regions of a dark cloud in the solar neighborhood, a result that has important implications for models of ice formation and evolution in the interstellar medium. The K-type field star Elias 16 was previously known to display solid-state absorption features of H 2 O and CO ices arising in the Taurus Dark Cloud. Our detection of the CO 2 feature at 4.27 μm in this line of sight implies a column density N (CO 2)= 4.6+ 1.3− 0.6× 10 17 cm-2, equivalent to~ 18% and ...

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