On ionization mechanisms towards gamma 2 Vel and zeta PUP

Details On ionization mechanisms towards gamma 2 Vel and zeta PUP On ionization mechanisms towards gamma 2 Vel and zeta PUP

Feb 1976

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976ap%26ss..39..419t&link_type=abstract

Astrophysics and Space Science, vol. 39, Feb. 1976, p. 419-427.

Astronomy and Astrophysics

Astrophysics

2

Collision Rates, Gas Ionization, Interstellar Gas, Density Distribution, Ionization Potentials, Ionizing Radiation, Photoionization, Ultraviolet Radiation

Scientific paper

A perusal of the observed column densities of different ions towards two stars, gamma 2 Vel and zeta Pup, has indicated the presence of an ionization mechanism, the rate of which depends exponentially on the ionization potential. An examination of two such mechanisms, collisional ionization and ionization by UV-photon with flux depending exponentially on frequency, has shown that the collisional ionization is possibly the dominant mechanism in the intercloud medium towards gamma 2 Vel and zeta Pup.

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