J/A+A/615/A13 Narrow line Seyfert 1 (NLS1) galaxies spectra (Schmidt+, 2018)
Asymmetric emission of the [OIII]λ5007 profile in narrow line Seyfert 1
galaxies.
Schmidt E., Oio G.A., Ferreiro D., Vega L., Weidmann W.
<Astron. Astrophys. 615, A13 (2018)>
=2018A&A...615A..13S 2018A&A...615A..13S (SIMBAD/NED BibCode)
ADC_Keywords: Active gal. nuclei ; Spectroscopy
Keywords: galaxies: Seyfert - galaxies: active - galaxies: nuclei -
kinematics and dynamics
Abstract:
Many active galactic nuclei (AGN) and particularly narrow line
Seyfert 1 (NLS1) galaxies, usually exhibit blueshifts and blue wings
in several emission lines, which are mainly associated to outflows and
strong winds. Although there is no clear evidence of the physical
origin of the [OIII] blue wings, it has been suggested that they could
be emitted from the inner parts of the narrow line region (NLR).
In order to study the radial velocity difference between the narrow
component of Hβ and the core component of [OIII]λ5007 and
the asymmetric emission of this forbidden line, we investigate a
sample of NLS1 galaxies. One of the aims of this paper is to analyze
the blue wings of the [OIII]λ5007 profiles and their relation
with the central engine. We have obtained and studied
medium-resolution spectra (190km/s FWHM at Hβ) of a sample of 28
NLS1 galaxies in the optical range 4300-5200Å. We performed
Gaussian decomposition to the Hβ and
[OIII]λλ4959,5007 emission profiles in order to study
the distinct components of these lines.
A new blue outlier galaxy is found, with the center of the core
component of [OIII] blueshifted by 405km/s relative to the
center of the narrow component of Hβ line. We confirmed a
previously known correlation between the blueshift and the FWHM of the
core component of [OIII]λ5007 line. We also corroborated the
correlation between the latter and the velocity of the centroid of the
blue wing. On the other hand, studying the radial velocity difference
between the blue end of the asymmetric emission and the centroid of
the core component of [OIII], we found a correlation between it and
the central black hole mass and, therefore, with the luminosity of the
broad component of Hβ. Finally, we found a moderate correlation
between the luminosity of the [OIII] blue wing and the black hole
mass.
These results suggest that the asymmetric emission of the [OIII] lines
is related to the central engine, not only through the black hole but
also in the intensity of the AGN, in agreement with previous results.
Description:
Optical spectra of 28 narrow line Seyfert 1 galaxies covering the
spectral range from 4300Å to 5200Å and spectra of 6 NLS1
galaxies in the spectral range 5800Å-6800Å. Data were taken
using the CASLEO 2.15m. telescope and using the 600-line/mm grating
giving a resolution of 170km/s and 190km/s FWHM around Hα and
Hβ, respectively.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
tablea1.dat 142 28 Observed galaxies
fits/* . 34 Individual spectra
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Byte-by-byte Description of file: tablea1.dat
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Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 23 A23 --- Name Galaxy name
24 A1 --- n_Name [*] * when taken from Schmidt et al.
(2016, Cat. J/A+A/596/A95A)
26- 27 I2 h RAh Right ascension (J2000.0)
29- 30 I2 min RAm Right ascension (J2000.0)
32- 36 F5.2 s RAs Right ascension (J2000.0)
38 A1 --- DE- Declination sign (J2000.0)
39- 40 I2 deg DEd Declination (J2000.0)
42- 43 I2 arcmin DEm Declination (J2000.0)
45- 48 F4.1 arcsec DEs Declination (J2000.0)
50- 54 I5 km/sec RV Radial velocity
56- 63 F8.6 --- z Redshift
65- 68 F4.1 --- mag Magnitude in filter
70 A1 --- Filter [RVbg] Filter
72- 75 F4.2 arcmin MajDiam ?=- Major diameter
77- 80 F4.2 arcmin MinDiam ?=- Minor diameter
82-109 A28 --- FileNameB Name of the fits file in the blue range
in subdirectory fits
111-142 A32 --- FileNameR Name of the fits file in the red range
in subdirectory fits
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Acknowledgements:
Eduardo Schmidt, eduschmidt(at)oac.unc.edu.ar
(End) Eduardo Schmidt [IATE, Argentina], Patricia Vannier [CDS] 26-Jan-2018