HARADA, Nanase; HERBST, Eric; WAKELAM, Valentine

doi:10.1088/0004-637X/721/2/1570

Metadatos

Mostrar el registro completo del ítem

Licencia de uso del documento

HARADA, Nanase

HERBST, Eric
The Ohio State University [Columbus] [OSU]
Departments of Astronomy and Chemistry

WAKELAM, Valentine
Laboratoire d'Astrophysique de Bordeaux [Pessac] [LAB]
Observatoire aquitain des sciences de l'univers [OASU]
Université Sciences et Technologies - Bordeaux 1 [UB]
Laboratoire d'astrodynamique, d'astrophysique et d'aéronomie de bordeaux [L3AB]

Idioma

Article de revue

Este ítem está publicado en

The Astrophysical Journal. 2010-10, vol. 721, p. 1570-1578

American Astronomical Society

Resumen en inglés

We present a new interstellar chemical gas-phase reaction network for time-dependent kinetics that can be used for modeling high-temperature sources up to ≈800 K. This network contains an extended set of reactions based on the Ohio State University (OSU) gas-phase chemical network. The additional reactions include processes with significant activation energies, reverse reactions, proton exchange reactions, charge exchange reactions, and collisional dissociation. Rate coefficients already in the OSU network are modified for H2 formation on grains, ion-neutral dipole reactions, and some radiative association reactions. The abundance of H2O is enhanced at high temperature by hydrogenation of atomic O. Much of the elemental oxygen is in the form of water at T >= 300 K, leading to effective carbon-rich conditions, which can efficiently produce carbon-chain species such as C2H2. At higher temperatures, HCN and NH3 are also produced much more efficiently. We have applied the extended network to a simplified model of the accretion disk of an active galactic nucleus.< Leer menos

Metadatos

Licencia de uso del documento

A New Network for Higher-temperature Gas-phase Chemistry. I. A Preliminary Study of Accretion Disks in Active Galactic Nuclei

Idioma

Este ítem está publicado en

Resumen en inglés

DOI

Orígen

Centros de investigación