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Title: NEAR-INFRARED BAND STRENGTHS OF MOLECULES DILUTED IN N{sub 2} AND H{sub 2}O ICE MIXTURES RELEVANT TO INTERSTELLAR AND PLANETARY ICES

Abstract

The relative abundances of ices in astrophysical environments rely on accurate laboratory measurements of physical parameters, such as band strengths (or absorption intensities), determined for the molecules of interest in relevant mixtures. In an extension of our previous study on pure-ice samples, here we focus on the near-infrared absorption features of molecules in mixtures with the dominant components of interstellar and planetary ices, H{sub 2}O and N{sub 2}. We present experimentally measured near-infrared spectral information (peak positions, widths, and band strengths) for both H{sub 2}O- and N{sub 2}-dominated mixtures of CO (carbon monoxide), CO{sub 2} (carbon dioxide), CH{sub 4} (methane), and NH{sub 3} (ammonia). Band strengths were determined during sample deposition by correlating the growth of near-infrared features (10,000-4000 cm{sup -1}, 1-2.5 {mu}m) with better-known mid-infrared features (4000-400 cm{sup -1}, 2.5-25 {mu}m) at longer wavelengths.

Authors:
;  [1]
  1. Astro- and Solar-System Physics Program, Department of Physics, University of Alabama at Birmingham, Birmingham, AL 35294-1170 (United States)
Publication Date:
OSTI Identifier:
22086453
Resource Type:
Journal Article
Journal Name:
Astrophysical Journal
Additional Journal Information:
Journal Volume: 759; Journal Issue: 1; Other Information: Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0004-637X
Country of Publication:
United States
Language:
English
Subject:
79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; ABSORPTION; ABUNDANCE; AMMONIA; ASTRONOMY; ASTROPHYSICS; CARBON DIOXIDE; CARBON MONOXIDE; DEPOSITION; ICE; METHANE; MIXTURES; MOLECULES; NEAR INFRARED RADIATION; WATER

Citation Formats

Richey, C. R., and Gerakines, P. A., E-mail: christina.r.richey@nasa.gov, E-mail: gerak@uab.edu. NEAR-INFRARED BAND STRENGTHS OF MOLECULES DILUTED IN N{sub 2} AND H{sub 2}O ICE MIXTURES RELEVANT TO INTERSTELLAR AND PLANETARY ICES. United States: N. p., 2012. Web. doi:10.1088/0004-637X/759/1/74.
Richey, C. R., & Gerakines, P. A., E-mail: christina.r.richey@nasa.gov, E-mail: gerak@uab.edu. NEAR-INFRARED BAND STRENGTHS OF MOLECULES DILUTED IN N{sub 2} AND H{sub 2}O ICE MIXTURES RELEVANT TO INTERSTELLAR AND PLANETARY ICES. United States. doi:10.1088/0004-637X/759/1/74.
Richey, C. R., and Gerakines, P. A., E-mail: christina.r.richey@nasa.gov, E-mail: gerak@uab.edu. Thu . "NEAR-INFRARED BAND STRENGTHS OF MOLECULES DILUTED IN N{sub 2} AND H{sub 2}O ICE MIXTURES RELEVANT TO INTERSTELLAR AND PLANETARY ICES". United States. doi:10.1088/0004-637X/759/1/74.
@article{osti_22086453,
title = {NEAR-INFRARED BAND STRENGTHS OF MOLECULES DILUTED IN N{sub 2} AND H{sub 2}O ICE MIXTURES RELEVANT TO INTERSTELLAR AND PLANETARY ICES},
author = {Richey, C. R. and Gerakines, P. A., E-mail: christina.r.richey@nasa.gov, E-mail: gerak@uab.edu},
abstractNote = {The relative abundances of ices in astrophysical environments rely on accurate laboratory measurements of physical parameters, such as band strengths (or absorption intensities), determined for the molecules of interest in relevant mixtures. In an extension of our previous study on pure-ice samples, here we focus on the near-infrared absorption features of molecules in mixtures with the dominant components of interstellar and planetary ices, H{sub 2}O and N{sub 2}. We present experimentally measured near-infrared spectral information (peak positions, widths, and band strengths) for both H{sub 2}O- and N{sub 2}-dominated mixtures of CO (carbon monoxide), CO{sub 2} (carbon dioxide), CH{sub 4} (methane), and NH{sub 3} (ammonia). Band strengths were determined during sample deposition by correlating the growth of near-infrared features (10,000-4000 cm{sup -1}, 1-2.5 {mu}m) with better-known mid-infrared features (4000-400 cm{sup -1}, 2.5-25 {mu}m) at longer wavelengths.},
doi = {10.1088/0004-637X/759/1/74},
journal = {Astrophysical Journal},
issn = {0004-637X},
number = 1,
volume = 759,
place = {United States},
year = {2012},
month = {11}
}