Enhanced effects of starlight on the interstellar medium

Details Enhanced effects of starlight on the interstellar medium Enhanced effects of starlight on the interstellar medium

Jun 1976

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976apj...206..452g&link_type=abstract

Astrophysical Journal, vol. 206, June 1, 1976, pt. 1, p. 452-457.

Astronomy and Astrophysics

Astrophysics

6

Cosmic Dust, Desorption, Interstellar Gas, Interstellar Matter, Radiant Heating, Stellar Radiation, Gas Density, Photodissociation, Photoelectric Effect, Radiant Flux Density

Scientific paper

The photodesorption of molecules and atoms from the surfaces of interstellar grains can be an important source of heating for the interstellar medium and the origin of instabilities which may separate grains and gas. For low densities, the force exerted on the grains is proportional to the gas density and independent of the radiation intensity; for high densities, it is proportional to the radiative flux and independent of the gas density. This force may act differently on grains of different sizes. The photoelectric effect may also be an efficient mechanism for the separation of gas and dust in diffuse clouds.

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