Narrow Line Seyfert 1s in the IBISCO sample

TL;DR

This study analyzes the X-ray spectra of 8 Narrow Line Seyfert 1 galaxies from the IBISCO sample to understand their accretion mechanisms, outflows, and relation to host galaxy properties, revealing higher Eddington ratios and molecular gas fractions.

Contribution

It provides the first detailed X-ray spectral analysis of NLS1 galaxies within the IBISCO sample, linking their properties to broader AGN and host galaxy characteristics.

Findings

NLS1 galaxies show higher Eddington ratios than typical Seyferts.

NLS1s have larger molecular gas fractions compared to their parent Seyfert population.

Preliminary results suggest distinct accretion and feedback mechanisms in NLS1s.

Abstract

We present the broad-band soft and hard X-ray spectral analysis of 8 Narrow Line Seyfert 1 galaxies extracted from the IBISCO Sample. The study also focuses on the properties of the NLS1 in our sample in relation to those of the IBISCO parent Seyfert population. The IBISCO sample comprises 57 AGN selected from the INTEGRAL IBIS AGN catalogue (in the 20-100 keV band), with z$<$0.05 and covering a wide range of luminosities, BH masses and absorption. All AGN have also measurements of the molecular gas (H$_2$) content of their host galaxies, through the detection of CO emission lines. The main goals of this analysis are to accurately determine the X-ray continuum emission, investigate the presence of absorption features around 7 keV (indicative of the presence of outflows) and measure the bolometric luminosity in order to study the accretion parameters of the eight IBISCO NLS1, and study the accretion mechanisms and investigate the feeding and feedback cycle in these peculiar AGN. Preliminary results show that NLS1 tend to have higher Eddington ratios and larger molecular gas fractions than their parent Seyfert population in the IBISCO sample. Nuclear (AGN) vs. host galaxy properties scaling relations of NLS1 in relation to the parent Seyfert population are also explored.