The signature of high velocity gas in the spectra of NGC 4151

Details The signature of high velocity gas in the spectra of NGC 4151 The signature of high velocity gas in the spectra of NGC 4151

2002-02-07

arxiv.org/abs/astro-ph/0202146v1

Astronomy and Astrophysics

Astrophysics

16 pages, LaTeX class for Astronomy and Astrophysics (including 3 Tables) + 8 PostScript figures. To appear in "Astronomy and

Scientific paper

10.1051/0004-6361:20020245

The multiwavelength emission spectrum and associated velocity field of the Seyfert prototype NGC 4151 is modeled. HST data has impressively revealed the existence of a large range of velocities (100 - 1500 \kms) dominating the emitting clouds in the extended emission line region of the galaxy. Following this observational result, a revision of the photoionization modeling approach applied to NGC 4151 is presented. It is concluded that a mixture of radiation dominated clouds and shock dominated clouds are required to explain the multiwavelength line and continuum spectra of the galaxy.

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