A possible interpretation of the optical spectrum for BL Lac-type objects

Details A possible interpretation of the optical spectrum for BL Lac-type objects A possible interpretation of the optical spectrum for BL Lac-type objects

Mar 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984ap%26ss.100..301n&link_type=abstract

Astrophysics and Space Science (ISSN 0004-640X), vol. 100, no. 1-2, March 1984, p. 301-307.

Astronomy and Astrophysics

Astrophysics

Atomic Energy Levels, Bl Lacertae Objects, Hydrogen Atoms, Spectrum Analysis, Visible Spectrum, Atomic Collisions, Electron Density (Concentration), Electron Energy, H Beta Line, Spectral Energy Distribution, Thermal Radiation, Velocity Distribution

Scientific paper

On the basis of Sobolev's method, the population of 30 levels of hydrogen atom is determined allowing for the radiative and collision processes of the heating and ionization of the medium with velocity gradient grad v = 10-9 - 10-11s-1, electron temperature Te = 104K - 2×104K and electron density Ne = 1010cm-3 - 1011cm-3. The central source radiation is characterized by a power spectrum with spectral indices varying from 0 to 2. A region of possible physical conditions is found where the thermal diffuse radiation of the envelope exceeds the emission in the Balmer Hβ line.

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