Spectral nuclear properties of NLS1 galaxies

Abstract

It is not yet well known whether narrow line Seyfert 1 (NLS1) galaxies follow the $M_{BH}-{\sigma }_{\star }$ relation found for normal galaxies. Emission lines, such as [SII] or [OIII]$\lambda$5007, have been used as a surrogate of the stellar velocity dispersion and various results have been obtained. On the other hand, some active galactic nuclei (AGNs) have shown Balmer emission with an additional intermediate component (IC) besides the well-known narrow and broad lines. In order to re-examine the location of NLS1 in the $M_{BH}-{\sigma }_{\star }$ relation, we test some emission lines, such as the narrow component (NC) of H$\alpha$ and the forbidden [NII]$\lambda \lambda$6548,6584 and [SII]$\lambda \lambda$6716,6731 lines, as replacements for ${\sigma }_{\star }$. On the other hand, we study the properties of the IC of H$\alpha$ found in 14 galaxies of the sample to find a link between this component, the central engine, and the remaining lines. We also compare the emission among the broad component (BC) of H$\alpha$ and those emitted at the narrow line region (NLR). We have obtained and studied medium-resolution spectra (170 km s${}^{-1}$ FWHM at H$\alpha$) of 36 NLS1 galaxies in the optical range $\sim$5800 - 6800Å. We found that, in general, most of the galaxies lie below the $M_{BH}-{\sigma }_{\star }$ relation when the NC of H$\alpha$, [SII], and [NII] lines are used as a surrogate of ${\sigma }_{\star }$. Besides this, we found that 13 galaxies show an IC, most of which are in the velocity range $\sim$ 700 $-$ 1500 km s${}^{-1}$. This is same range as in AGN types and is well correlated with the FWHM of BC and, therefore, with the BH mass. On the other hand, we found that there is a correlation between the luminosity of the BC of H$\alpha$ and NC, IC, [NII]$\lambda$6584, and [SII] lines.

arXiv commentAccepted to be published in the A&A. 13 pages, 9 figures, 2 tables

References in corpus (31)

• A Fundamental Relation Between Supermassive Black Holes and Their Host Galaxies
• A Relationship Between Nuclear Black Hole Mass and Galaxy Velocity Dispersion
• The slope of the black-hole mass versus velocity dispersion correlation
• The Eleventh and Twelfth Data Releases of the Sloan Digital Sky Survey: Final Data from SDSS-III
• SDSS-III: Massive Spectroscopic Surveys of the Distant Universe, the Milky Way Galaxy, and Extra-Solar Planetary Systems
• Estimating Black Hole Masses in Active Galaxies Using the Halpha Emission Line
• A Comprehensive Study of 2 000 Narrow Line Seyfert 1 Galaxies from the Sloan Digital Sky Survey: I. The Sample
• Narrow Line Seyfert 1 Galaxies and the Evolution of Galaxies & Active Galaxies
• M-BH - sigma relation for a Complete Sample of Soft X-ray Selected AGNs
• Black Hole Mass, Velocity Dispersion and the Radio Source in AGN
• A Complete Sample of Soft X-ray Selected AGN: II. Statistical Analysis
• Black Holes and Hosts of Active and Quiescent Galaxies: I. The Black Hole-Bulge Relation revisited
• The Relationship Between Black Hole Mass and Velocity Dispersion in Seyfert 1 Galaxies
• Evolution of Active Galaxies: Black-hole Mass - Bulge relations for Narrow Line Objects
• Black hole mass and velocity dispersion of narrow line region in active galactic nuclei and narrow line Seyfert 1 galaxies
• Contribution of the Disk Emission to the Broad Emission Lines in AGNs: Two-component model
• Narrow-line Seyfert 1 Galaxies and the M_BH - sigma Relation
• Active Galactic Nuclei Emission-Line Properties Versus Eddington Ratio
• Narrow-line Seyfert 1 Galaxies from the Sloan Digital Sky Survey Early Data Release
• Hbeta Profiles in Quasars: Evidence for an Intermediate-line Region
• Optical emission line properties of Narrow Line Seyfert 1s and comparison AGN
• Supermassive black holes, pseudobulges, and the narrow-line Seyfert 1 galaxies
• Mass Outflow from the Nucleus of the Seyfert 1 Galaxy NGC 4151
• The black hole--bulge relation in AGNs
• Evidence for an intermediate line region in AGN's inner torus region and its evolution from narrow to broad line Seyfert I galaxies
• Mass Outflow in the Seyfert 1 Galaxy NGC 5548
• The Locus of Highly Accreting AGNs on the M_BH--sigma Plane: Selections, Limitations, and Implications
• Black hole growth by accretion
• Revisiting the Black Hole Masses of Soft X-ray-Selected Active Galactic Nuclei
• New active galactic nuclei detected in ROSAT All Sky Survey galaxies - The complete dataset
• [O III] emission line in narrow-line Seyfert 1 galaxies

Cited by in corpus (15)

• A CEERS Discovery of an Accreting Supermassive Black Hole 570 Myr after the Big Bang: Identifying a Progenitor of Massive z > 6 Quasars
• Asymmetric emission of the [OIII]$\lambda$5007 profile in narrow-line Seyfert 1 galaxies
• A Systematic Survey for z < 0.04 Changing-Look AGNs
• Circumnuclear rings and Lindblad resonances in spiral galaxies
• Spatially-resolved spectroscopy of narrow-line Seyfert 1 host galaxies
• Spectroscopic study of the [OIII]$\lambda$5007 profile in Seyfert 1 galaxies
• The Southern Hemisphere Narrow-Line Seyfert 1 Infrared Survey
• Characterization of the continuum and kinematical properties of nearby NLS1
• The [OIII] profiles of far-infrared active and non-active optically-selected green valley galaxies
• Discovery of Five Green Pea Galaxies with Double-peaked Narrow [OIII] Lines
• AGN orientation through the spectroscopic correlations and model of dusty cone shell
• Analysis of interacting and isolated quasars
• Rotation curves and dynamical masses of MaNGA barred galaxies
• The viewing angle in AGN SED models, a data-driven analysis
• Infrared and Optical Emission-line Diagnostics