Alfven Heating and High Ionization Lines in QSO BLRs

Details Alfven Heating and High Ionization Lines in QSO BLRs Alfven Heating and High Ionization Lines in QSO BLRs

Dec 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998tx19.confe.409g&link_type=abstract

Abstracts of the 19th Texas Symposium on Relativistic Astrophysics and Cosmology, held in Paris, France, Dec. 14-18, 1998. Eds.:

Astronomy and Astrophysics

Astrophysics

Scientific paper

There is in the literature some studies showing the relevance of Alfven heating (resonance surface, nonlinear and turbulent Alfvenic dampings) in order to establish the stability of quasar clouds in the intercloud medium, due to thermal instability. It is well known that the photoionization by the continuum radiation from the central source is, almost certainly, the most important mechanism to heat and ionize the broad-line region. The present work shows the results of the time-dependent calculations to follow the evolution of the forming clouds, out of the 10^7 K intercloud medium. We calculate the soft X-rays, EUV and optical line emission associated with the forming clouds in order to compare them with the observations.

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