Journal ArticleDOI
Model of Titans ionosphere with detailed hydrocarbon ion chemistry
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In this paper, the authors modified the previous model of Keller, et al., 1992 of the ionosphere of Titan, taking into account newly measured gas phase kinetic rates, particularly those of the higher mass hydrocarbons and nitriles.About:
This article is published in Planetary and Space Science.The article was published on 1998-10-01. It has received 181 citations till now. The article focuses on the topics: Mass spectrometry.read more
Citations
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Ion chemistry and N-containing molecules in Titan's upper atmosphere
TL;DR: In this paper, the Ion and Neutral Mass Spectrometer (INMS) onboard the Cassini spacecraft performed the first composition measurements of Titan's ionosphere and revealed that Titan has the most compositionally complex ionosphere in the Solar System, with roughly 50 ions at or above the detection threshold.
Journal ArticleDOI
Current state of modeling the photochemistry of Titan's mutually dependent atmosphere and ionosphere
E. H. Wilson,Sushil K. Atreya +1 more
TL;DR: In this article, a two-stream discrete ordinates method was employed to characterize the transfer of solar radiation, and the effects of electron-impact, cosmic-ray deposition, and aerosol opacities from fractal and Mie particles.
Journal ArticleDOI
Atmospheric Escape and Evolution of Terrestrial Planets and Satellites
TL;DR: In this paper, the origin and evolution of Earth, Mars, Earth's, Mars' and Titan's atmospheres are discussed from the time when the active young Sun arrived at the Zero-Age-Main-Sequence.
Journal ArticleDOI
The Cassini Ion and Neutral Mass Spectrometer (INMS) Investigation
J. H. Waite,W. S. Lewis,Wayne Kasprzak,Vincent G. Anicich,Bruce P. Block,Thomas E. Cravens,Greg Fletcher,Wing-Huen Ip,Janet G. Luhmann,Ralph L. McNutt,Hasso B. Niemann,John K. Parejko,J. E. Richards,Rob Thorpe,Erin Walter,Roger V. Yelle +15 more
TL;DR: The Cassini Ion and Neutral Mass Spectrometer (INMS) was used to determine the mass composition and number densities of neutral species and low-energy ions in key regions of the Saturn system as mentioned in this paper.
Journal ArticleDOI
Reaction Networks for Interstellar Chemical Modelling: Improvements and Challenges
Valentine Wakelam,Valentine Wakelam,Ian W. M. Smith,Eric Herbst,Jürgen Troe,Jürgen Troe,Wolf D. Geppert,Harold Linnartz,Karin I. Öberg,Karin I. Öberg,Evelyne Roueff,Marcelino Agúndez,Pascal Pernot,Herma M. Cuppen,Jean-Christophe Loison,D. Talbi +15 more
TL;DR: The current state of knowledge concerning the rate coefficients and their uncertainties for the major gas-phase processes (i.e., ion-neutral reactions, neutral neutral reactions, radiative association, and dissociative recombination) is reviewed in this article.
References
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Journal ArticleDOI
Photochemistry of the atmosphere of Titan: comparison between model and observations.
TL;DR: The photochemistry of simple molecules containing carbon, hydrogen, nitrogen, and oxygen atoms in the atmosphere of Titan has been investigated using updated chemical schemes and the authors' own estimates of a number of key rate coefficients, which satisfactorily accounts for the concentrations of minor species observed by the Voyager IRIS and UVS instruments.
Journal ArticleDOI
Solar photo rates for planetary atmospheres and atmospheric pollutants
TL;DR: In this article, the rate coefficients and excess energies for dissociation, ionization, and dissociative ionization are presented for atomic and molecular species that have been identified or are suspected to exist in the atmospheres of planets, satellites (moons), comets, or as pollutants in the Earth atmosphere.
Journal ArticleDOI
Photochemical modeling of Titan's atmosphere
TL;DR: A new photochemical model of Titan's atmosphere which includes all the important compounds and reactions in spherical geometry from the surface to 1240 km is developed and is in a closer agreement with the abundances inferred from the Voyager infrared measurements at the equator than the Yung et al. results.
Book
Atmospheres and Ionospheres of the Outer Planets and Their Satellites
TL;DR: In this paper, an attempt at summarizing our present understanding of the atmospheres and ionospheres in the outer solar system, with particular emphasis on the relevant physics and chemistry is made.
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