Scientific article

Luminescence from Vacuum-Ultraviolet irradiated Cosmic Ice Analogs and Residues

Published inThe Astrophysical journal, vol. 583, no. 1, p. 514-523
Publication date2003

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.

  • Astrochemistry
  • Comets: general
  • Dust
  • Extinction
  • ISM: molecules
  • Methods: laboratory
  • Molecular data
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
ISSN of the journal0004-637X

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