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J/A+A/323/707 Nature of the FHIL winds from AGN (Erkens+ 1997)
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The nature of the FHIL winds from AGN
Erkens U., Appenzeller I., Wagner S.
<Astron. Astrophys. 323, 707 (1997)>
=1997A&A...323..707E (SIMBAD/NED BibCode)
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ADC_Keywords: Active gal. nuclei ; Galaxies, spectra ; Line Profiles
Keywords: galaxies: active - galaxies: Seyfert - galaxies: nuclei -
X-rays: galaxies - line: profiles
Abstract:
In order to investigate the properties of the forbidden
high-ionization lines (FHILs) in the spectra of AGN we observed 15
Seyfert galaxies and two emission line radio galaxies with a spectral
resolution of about 2000 in the spectral range 3200-11000{AA}. All
observed spectra contained significant [Ne V] and [Fe VII] lines. The
spectra of the Seyfert nuclei (but not the radio galaxies) showed also
[Fe X], [Fe XI], and in some cases [Fe XIV] emission. Our data confirm
that the FHILs are on average broader and blueshifted relative to the
lines of lower ionization stages. The amount of the blueshift was
found to be correlated with the line widths. Large blueshifts were
observed only for lines with high FWHM. An analysis of the line ratios
indicates for the FHIL producing plasma an average electron
temperature of about 7x10^4^K. Comparing our results with ROSAT data
we found a correlation between the X-ray spectral index and the
strength of the FHILs. Strong FHIL emission was found to occur
predominantly in objects with a soft X-ray excess. We propose that the
FHIL emission and the X-ray absorption edges in AGN ("warm absorbers")
are related and that both phenomena result from a radiation driven
warm wind originating in the central region of the AGN.
See also:
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
tab1-17 60 491 Reddening corrected line flux, velocity shift,
and line widths measured in the spectrum
table18 17 17 Observed H{beta} line flux
tables.tex 77 875 LaTeX version of the tables
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Byte-by-byte Description of file: tab1-17
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Bytes Format Units Label Explanations
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1- 8 A8 --- AGN AGN name
10- 17 A8 --- Ion Ion species
19- 25 F7.2 0.1nm lambda rest wavelength
27- 34 E8.2 --- Flux Flux (in units Flux(H{beta})=1)
35- 42 E8.2 --- e_Flux ? Mean error on Flux
43- 46 I4 km/s deltaV ? velocity shift
48- 49 I2 km/s e_deltaV ? Mean error on velocity shift
51- 54 I4 km/s FWHM ? FWHM
56- 58 I3 km/s e_FWHM ? Mean error on FWHM
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Byte-by-byte Description of file: table18
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Bytes Format Units Label Explanations
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1- 9 A9 --- AGN AGN name
13- 17 F5.2 10-16W/m2 Flux(Hb) Normalised H{beta} flux
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Acknowledgements: Monika Darr <M.Darr@lsw.uni-heidelberg.de>
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(End) Patricia Bauer [CDS] 26-Jun-1997