Astronomy and Astrophysics – Astrophysics
Scientific paper
Jul 1991
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991apj...375..642h&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 375, July 10, 1991, p. 642-651.
Astronomy and Astrophysics
Astrophysics
15
Hydrocarbons, Interstellar Matter, Line Spectra, Shock Wave Propagation, Astronomical Models, Line Shape, Radial Velocity
Scientific paper
High-resolution, high SNR observations of CH and CH(+) toward Zeta Oph, Xi Per, and P Cyg are used to test several predictions of shock models of molecule formation. The predicted differences between the CH and HCH(+) heliocentric velocities of the magnitude produced by the shock theories are not found in any of the three stars. toward Zeta Oph and Xi Per, no difference is found, based on high-quality data, between the observed CH(+) lie profiles and a Gaussian function which would be expected as a result of shock structure. Gaussian line width parameters of CH(+) lines toward Zeta Oph and Xi Per are broad as predicted by shock models are consistent with previous measurements. These observations yield only weak evidence in favor of the predictions of shock models of molecule formation.
Craig Nahide
Hawkins Isabel
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