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- W1989284776 abstract "view Abstract Citations (58) References (36) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Polycyclic Aromatic Hydrocarbons and Molecular Equilibria in Carbon-rich Stars Cherchneff, Isabelle ; Barker, John R. Abstract Thermal equilibrium (TE) molecular concentrations are computed for several carbon-rich elemental compositions and various total gas pressures. Such calculations may be used to estimate the molecular abundances in a carbon-rich stellar photosphere and its vicinity. The six elements and seventy molecules considered include observed molecules and radicals, polycyclic aromatic hydrocarbons (PAHs) up to the size of coronene, long-chain hydrocarbons, the cyanopolyyne group, and complex ring compounds. The thermodynamic data used are from the recent literature or are estimated. Condensations of graphite, silicon carbide, and quartz are also considered. The results show that long-chain hydrocarbons are abundant at moderate temperatures. PAHs also form in significant amounts at low temperatures, but only benzene survives graphite condensation. TE molecular profiles are obtained for the inner region of an envelope model representative of late-type stars. Publication: The Astrophysical Journal Pub Date: August 1992 DOI: 10.1086/171624 Bibcode: 1992ApJ...394..703C Keywords: Carbon Stars; Hydrocarbons; Thermodynamic Equilibrium; Abundance; Gas Pressure; Molecular Physics; Photosphere; Stellar Atmospheres; Stellar Envelopes; Astrophysics; MOLECULAR DATA; MOLECULAR PROCESSES full text sources ADS |" @default.
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- W1989284776 date "1992-08-01" @default.
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- W1989284776 title "Polycyclic aromatic hydrocarbons and molecular equilibria in carbon-rich stars" @default.
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