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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 (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:
FileName Lrecl Records Explanations
ReadMe 80 . This file tablea1.dat 142 28 Observed galaxies fits/* 0 34 Individual spectra
Byte-by-byte Description of file: tablea1.dat
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
Acknowledgements: Eduardo Schmidt, eduschmidt(at)
(End) Eduardo Schmidt [IATE, Argentina], Patricia Vannier [CDS] 26-Jan-2018
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