English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

A sample of narrow-line (NLS1) and broad-line Seyfert 1 (BLS1) galaxiesobserved with Suzaku is presented. The final sample consists of 22 NLS1s and 47BLS1s, for a total of 69 AGN that are all at low redshift (z<0.5) and exhibitlow host galaxy column densities (<10^22 cm^-2). The average spectrum for eachobject is fit with a toy model to characterise important parameters, includingthe photon index, soft excess, Compton hump (or hard excess), narrow iron linestrength, luminosity and X-ray Eddington ratio (L_x/L_Edd). We confirm previousfindings that NLS1s have steeper power laws and higher X-ray Eddington ratios,but also find that NLS1 galaxies have stronger soft and hard excesses thantheir BLS1 counterparts. Studying the correlations between parameters showsthat the soft and hard excesses are correlated for NLS1 galaxies, while no suchcorrelation is observed for BLS1s. Performing a principal component analysis(PCA) on the measured X-ray parameters shows that while the X-ray Eddingtonratio is the main source of variations within our sample (PC1), variations inthe soft and hard excesses form the second principal component (PC2) and it isdominated by the NLS1s. The correlation between the soft and hard excess inNLS1 galaxies may suggest a common origin for the two components, such as ablurred reflection model. The presented Suzaku sample of Seyfert 1 galaxies isa useful tool for analysis of the X-ray properties of AGN, and for the study ofthe soft and hard excesses observed in AGN.

A Suzaku sample of unabsorbed narrow-line and broad-line Seyfert 1 galaxies: I. X-ray spectral properties