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Scientific article
English

Luminescence from Vacuum-Ultraviolet irradiated Cosmic Ice Analogs and Residues

Contributors

Gudipati, Murthy S.; Dworkin, Jason P.; Chillier, Xavier; Allamandola, Louis J.

Published in

The Astrophysical journal, vol. 583, no. 1, p. 514-523

Publication date

2003

Abstract

Here we report a study of the optical luminescent properties for a variety of vacuum-ultraviolet (VUV)-irradiated cosmic ice analogs and the complex organic residues produced. Detailed results are presented for the irradiated, mixed molecular ice: H[2]O : CH[3]OH : NH[3] : CO (100 : 50 : 1 : 1), a realistic representation for an interstellar/precometary ice that reproduces all the salient infrared spectral features associated with interstellar ices. The irradiated ices and the room-temperature residues resulting from this energetic processing have remarkable photoluminescent properties in the visible (520-570 nm). The luminescence dependence on temperature, thermal cycling, and VUV exposure is described. It is suggested that this type of luminescent behavior might be applicable to solar system and interstellar observations and processes for various astronomical objects with an ice heritage. Some examples include grain temperature determination and vaporization rates, nebula radiation balance, albedo values, color analysis, and biomarker identification.

Keywords

  • Astrochemistry
  • Comets: general
  • Dust
  • Extinction
  • ISM: molecules
  • Methods: laboratory
  • Molecular data

UNIGE affiliation entities

Citation (ISO format)

GUDIPATI, Murthy S. et al. Luminescence from Vacuum-Ultraviolet irradiated Cosmic Ice Analogs and Residues. In: The Astrophysical journal, 2003, vol. 583, n° 1, p. 514–523. doi: 10.1086/345349

Identifiers

Additional URL for this publication

http://www.journals.uchicago.edu/cgi-bin/resolve?2003ApJ...583..514GPDF

Journal ISSN

0004-637X
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Technical informations

Creation

06/10/2009 11:59:00

First validation

06/10/2009 11:59:00

Update

14/03/2023 15:16:07

Status update

14/03/2023 15:16:07

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