Resonant Absorption in the AGN spectra emerging from photoionized gas: differences between steep and flat ionizing continua

Details Resonant Absorption in the AGN spectra emerging from photoionized gas: differences between steep and flat ionizing continua Resonant Absorption in the AGN spectra emerging from photoionized gas: differences between steep and flat ionizing continua

1998-12-21

arxiv.org/abs/astro-ph/9812392v1

Astronomy and Astrophysics

Astrophysics

22 pages, 10 figures. Accepted for publication on Apj

Scientific paper

10.1086/307187

We present photoionization models accounting for both photoelectric and resonant absorption. Resonance absorption lines from C, O, Ne, Mg, Si S and Fe between 0.1 and 10 keV are treated. In particular we consider the complex of almost 60 strong Fe L absorption lines around 1 keV. We calculate profiles, intensities and equivalent widths of each line, considering both Doppler and natural broadening mechanisms. Doppler broadening includes a term accounting for turbulence of the gas along the line of sight. We computed spectra transmitted by gas illuminated by drastically different ionizing continua and compared them to spectra observed in flat X-ray spectrum, broad optical emission line type 1 AGN, and steep X-ray spectrum, narrow optical emission line type 1 AGN. We show that the $\sim 1$ keV absorption feature observed in moderate resolution X-ray spectra of several Narrow Line Seyfert 1 galaxies can be explained by photoionization models, taking into account for resonance absorption, without requiring relativistic outflowing velocities of the gas, if the physical properties of these absorbers are close to those found in flat X-ray spectrum Seyfert 1 galaxies.

Affiliated with

Also associated with

No associations

Rating

Resonant Absorption in the AGN spectra emerging from photoionized gas: differences between steep and flat ionizing continua does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Resonant Absorption in the AGN spectra emerging from photoionized gas: differences between steep and flat ionizing continua, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Resonant Absorption in the AGN spectra emerging from photoionized gas: differences between steep and flat ionizing continua will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-483421