Absorption coefficients of the methane-nitrogen binary ice system

Implications for Pluto

S. Protopapa, W. M. Grundy, Stephen C Tegler, J. M. Bergonio

Research output: Contribution to journalArticle

13 Citations (Scopus)

Abstract

The methane-nitrogen phase diagram of Prokhvatilov and Yantsevich (1983. Sov. J. Low Temp. Phys. 9, 94-98) indicates that at temperatures relevant to the surfaces of icy dwarf planets like Pluto, two phases contribute to the methane absorptions: nitrogen saturated with methane N2:CH4 and methane saturated with nitrogen CH4:N2. No optical constants are available so far for the latter component limiting construction of a proper model, in compliance with thermodynamic equilibrium considerations. New optical constants for solid solutions of methane diluted in nitrogen (N2:CH4) and nitrogen diluted in methane (CH4:N2) are presented at temperatures between 40 and 90K, in the wavelength range 1.1-2.7μm at different mixing ratios. These optical constants are derived from transmission measurements of crystals grown from the liquid phase in closed cells. A systematic study of the changes of methane and nitrogen solid mixtures spectral behavior with mixing ratio and temperature is presented.

Original languageEnglish (US)
Pages (from-to)179-188
Number of pages10
JournalIcarus
Volume253
DOIs
StatePublished - Jun 1 2015

Fingerprint

Pluto (planet)
Pluto
absorption coefficient
absorptivity
ice
methane
nitrogen
mixing ratios
mixing ratio
dwarf planets
solid nitrogen
temperature
thermodynamic equilibrium
solid solution
compliance
liquid phases
solid solutions
planet
thermodynamics
diagram

Keywords

  • Ices, IR spectroscopy
  • Pluto
  • Trans-neptunian objects

ASJC Scopus subject areas

  • Space and Planetary Science
  • Astronomy and Astrophysics

Cite this

Absorption coefficients of the methane-nitrogen binary ice system : Implications for Pluto. / Protopapa, S.; Grundy, W. M.; Tegler, Stephen C; Bergonio, J. M.

In: Icarus, Vol. 253, 01.06.2015, p. 179-188.

Research output: Contribution to journalArticle

Protopapa, S. ; Grundy, W. M. ; Tegler, Stephen C ; Bergonio, J. M. / Absorption coefficients of the methane-nitrogen binary ice system : Implications for Pluto. In: Icarus. 2015 ; Vol. 253. pp. 179-188.
@article{84be4f590052481fbd66785cb1a60926,
title = "Absorption coefficients of the methane-nitrogen binary ice system: Implications for Pluto",
abstract = "The methane-nitrogen phase diagram of Prokhvatilov and Yantsevich (1983. Sov. J. Low Temp. Phys. 9, 94-98) indicates that at temperatures relevant to the surfaces of icy dwarf planets like Pluto, two phases contribute to the methane absorptions: nitrogen saturated with methane N2:CH4 and methane saturated with nitrogen CH4:N2. No optical constants are available so far for the latter component limiting construction of a proper model, in compliance with thermodynamic equilibrium considerations. New optical constants for solid solutions of methane diluted in nitrogen (N2:CH4) and nitrogen diluted in methane (CH4:N2) are presented at temperatures between 40 and 90K, in the wavelength range 1.1-2.7μm at different mixing ratios. These optical constants are derived from transmission measurements of crystals grown from the liquid phase in closed cells. A systematic study of the changes of methane and nitrogen solid mixtures spectral behavior with mixing ratio and temperature is presented.",
keywords = "Ices, IR spectroscopy, Pluto, Trans-neptunian objects",
author = "S. Protopapa and Grundy, {W. M.} and Tegler, {Stephen C} and Bergonio, {J. M.}",
year = "2015",
month = "6",
day = "1",
doi = "10.1016/j.icarus.2015.02.027",
language = "English (US)",
volume = "253",
pages = "179--188",
journal = "Icarus",
issn = "0019-1035",
publisher = "Academic Press Inc.",

}

TY - JOUR

T1 - Absorption coefficients of the methane-nitrogen binary ice system

T2 - Implications for Pluto

AU - Protopapa, S.

AU - Grundy, W. M.

AU - Tegler, Stephen C

AU - Bergonio, J. M.

PY - 2015/6/1

Y1 - 2015/6/1

N2 - The methane-nitrogen phase diagram of Prokhvatilov and Yantsevich (1983. Sov. J. Low Temp. Phys. 9, 94-98) indicates that at temperatures relevant to the surfaces of icy dwarf planets like Pluto, two phases contribute to the methane absorptions: nitrogen saturated with methane N2:CH4 and methane saturated with nitrogen CH4:N2. No optical constants are available so far for the latter component limiting construction of a proper model, in compliance with thermodynamic equilibrium considerations. New optical constants for solid solutions of methane diluted in nitrogen (N2:CH4) and nitrogen diluted in methane (CH4:N2) are presented at temperatures between 40 and 90K, in the wavelength range 1.1-2.7μm at different mixing ratios. These optical constants are derived from transmission measurements of crystals grown from the liquid phase in closed cells. A systematic study of the changes of methane and nitrogen solid mixtures spectral behavior with mixing ratio and temperature is presented.

AB - The methane-nitrogen phase diagram of Prokhvatilov and Yantsevich (1983. Sov. J. Low Temp. Phys. 9, 94-98) indicates that at temperatures relevant to the surfaces of icy dwarf planets like Pluto, two phases contribute to the methane absorptions: nitrogen saturated with methane N2:CH4 and methane saturated with nitrogen CH4:N2. No optical constants are available so far for the latter component limiting construction of a proper model, in compliance with thermodynamic equilibrium considerations. New optical constants for solid solutions of methane diluted in nitrogen (N2:CH4) and nitrogen diluted in methane (CH4:N2) are presented at temperatures between 40 and 90K, in the wavelength range 1.1-2.7μm at different mixing ratios. These optical constants are derived from transmission measurements of crystals grown from the liquid phase in closed cells. A systematic study of the changes of methane and nitrogen solid mixtures spectral behavior with mixing ratio and temperature is presented.

KW - Ices, IR spectroscopy

KW - Pluto

KW - Trans-neptunian objects

UR - http://www.scopus.com/inward/record.url?scp=84925821773&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84925821773&partnerID=8YFLogxK

U2 - 10.1016/j.icarus.2015.02.027

DO - 10.1016/j.icarus.2015.02.027

M3 - Article

VL - 253

SP - 179

EP - 188

JO - Icarus

JF - Icarus

SN - 0019-1035

ER -