Vibrationally excited H2 in the upper atmosphere of Saturn

Tariq Majeed, John C. McConnell, Roger Yelle

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

We have considered the impact of resonance fluorescense of solar EUV radiation by H2 on the distribution of the vibrational levels of H2 in the upper atmosphere of Saturn. This source has not been considered to date. It appears that, for v ≥ 3, this is the most important source, more important than those due to photoelectron induced fluorescence, recombination of molecular ions such as H3+, and vibrational excitation of H2 by photoelectron impact. Based on the Voyager limb observations of H2 band emission we estimate that some of the higher vibrational levels may have effective temperatures ∼ 3500 K. Such high vibrational densities may have an impact on ionospheric densities.

Original languageEnglish (US)
Pages (from-to)131-134
Number of pages4
JournalAdvances in Space Research
Volume10
Issue number1
DOIs
StatePublished - 1990
Externally publishedYes

Fingerprint

Upper atmosphere
upper atmosphere
Saturn
Photoelectrons
photoelectrons
recombination
limb
solar radiation
fluorescence
Fluorescence
limbs
molecular ions
Radiation
ionospherics
ion
Ions
temperature
estimates
Temperature
excitation

ASJC Scopus subject areas

  • Space and Planetary Science
  • Astronomy and Astrophysics

Cite this

Vibrationally excited H2 in the upper atmosphere of Saturn. / Majeed, Tariq; McConnell, John C.; Yelle, Roger.

In: Advances in Space Research, Vol. 10, No. 1, 1990, p. 131-134.

Research output: Contribution to journalArticle

Majeed, Tariq ; McConnell, John C. ; Yelle, Roger. / Vibrationally excited H2 in the upper atmosphere of Saturn. In: Advances in Space Research. 1990 ; Vol. 10, No. 1. pp. 131-134.
@article{ea2b6bd6e33345e886ececf6983f0dc5,
title = "Vibrationally excited H2 in the upper atmosphere of Saturn",
abstract = "We have considered the impact of resonance fluorescense of solar EUV radiation by H2 on the distribution of the vibrational levels of H2 in the upper atmosphere of Saturn. This source has not been considered to date. It appears that, for v ≥ 3, this is the most important source, more important than those due to photoelectron induced fluorescence, recombination of molecular ions such as H3+, and vibrational excitation of H2 by photoelectron impact. Based on the Voyager limb observations of H2 band emission we estimate that some of the higher vibrational levels may have effective temperatures ∼ 3500 K. Such high vibrational densities may have an impact on ionospheric densities.",
author = "Tariq Majeed and McConnell, {John C.} and Roger Yelle",
year = "1990",
doi = "10.1016/0273-1177(90)90096-I",
language = "English (US)",
volume = "10",
pages = "131--134",
journal = "Advances in Space Research",
issn = "0273-1177",
publisher = "Elsevier Limited",
number = "1",

}

TY - JOUR

T1 - Vibrationally excited H2 in the upper atmosphere of Saturn

AU - Majeed, Tariq

AU - McConnell, John C.

AU - Yelle, Roger

PY - 1990

Y1 - 1990

N2 - We have considered the impact of resonance fluorescense of solar EUV radiation by H2 on the distribution of the vibrational levels of H2 in the upper atmosphere of Saturn. This source has not been considered to date. It appears that, for v ≥ 3, this is the most important source, more important than those due to photoelectron induced fluorescence, recombination of molecular ions such as H3+, and vibrational excitation of H2 by photoelectron impact. Based on the Voyager limb observations of H2 band emission we estimate that some of the higher vibrational levels may have effective temperatures ∼ 3500 K. Such high vibrational densities may have an impact on ionospheric densities.

AB - We have considered the impact of resonance fluorescense of solar EUV radiation by H2 on the distribution of the vibrational levels of H2 in the upper atmosphere of Saturn. This source has not been considered to date. It appears that, for v ≥ 3, this is the most important source, more important than those due to photoelectron induced fluorescence, recombination of molecular ions such as H3+, and vibrational excitation of H2 by photoelectron impact. Based on the Voyager limb observations of H2 band emission we estimate that some of the higher vibrational levels may have effective temperatures ∼ 3500 K. Such high vibrational densities may have an impact on ionospheric densities.

UR - http://www.scopus.com/inward/record.url?scp=11144333888&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=11144333888&partnerID=8YFLogxK

U2 - 10.1016/0273-1177(90)90096-I

DO - 10.1016/0273-1177(90)90096-I

M3 - Article

AN - SCOPUS:11144333888

VL - 10

SP - 131

EP - 134

JO - Advances in Space Research

JF - Advances in Space Research

SN - 0273-1177

IS - 1

ER -