# The XBS sample of type 1 AGNs: Radio loudness vs. physical parameters

## TL;DR

This study investigates how the radio-loudness of type 1 AGNs correlates with black hole mass, revealing that higher mass black holes are significantly more likely to be radio-loud.

## Contribution

It provides the first large-sample analysis of the relationship between AGN radio-loudness and black hole mass using XMM-Newton Bright Survey data.

## Key findings

- Radio-loud AGNs are about 10 times more common at black hole masses >10^9 Msun.
- A strong correlation exists between black hole mass and radio-loudness in type 1 AGNs.
- The study enhances understanding of the physical parameters influencing AGN radio properties.

## Abstract

We have studied the relationship between the AGN radio-loudness and the mass of the central black-hole by using the ~190 type 1 AGN selected in the XMM-Newton Bright Survey (XBS). We find that radio-loud AGNs are much more frequent at high black-hole masses being a factor ~10 times more common for masses >10^9 Msun when compared to masses between 10^7-10^9 Msun.