Magnetohydrodynamic shocks in diffuse clouds. III - The line of sight toward Zeta Ophiuchi

Abstract

view Abstract Citations (70) References (48) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Magnetohydrodynamic Shocks in Diffuse Clouds. III. The Line of Sight toward zeta Ophiuchi Draine, B. T. Abstract Multifluid C-type shock models are presented for the gas on the line of sight toward Zeta Oph and compared with observational data. A shock model of a 9 km/s-shock propagating into diffuse molecular gas with n(H) of 20/cm, and H2/H of 3 is in good agreement with the observed column density and radial velocity of the CH(+) and is consistent with observational limits of column densities of the OH and CH. The preferred shock model predicts that a large fraction of the J = 3-5 H2 on this line of sight is due to collisional excitation in the shock-heated gas. The dominant molecular component present on this line of sight is interpreted as shock-compressed material behind the shock front. It is considered to be likely that the shock wave is driven by the pressure of the Zeta Oph H II region. Publication: The Astrophysical Journal Pub Date: November 1986 DOI: 10.1086/164694 Bibcode: 1986ApJ...310..408D Keywords: Astronomical Models; Line Of Sight; Magnetohydrodynamic Waves; Molecular Clouds; Ophiuchi Clouds; Shock Waves; Chemical Composition; Gas Density; H Ii Regions; Radial Velocity; Astrophysics; HYDROMAGNETICS; INTERSTELLAR: MOLECULES; SHOCK WAVES; STARS: INDIVIDUAL CONSTELLATION NAME: ZETA OPHIUCHI full text sources ADS | data products SIMBAD (1) Related Materials (2) Part 1: 1986ApJ...306..655D Part 2: 1986ApJ...310..392D