CAIXA: a Catalogue of AGN In the XMM-Newton Archive II. Multiwavelength correlations
Stefano Bianchi, Nuria Fonseca Bonilla, Matteo Guainazzi, Giorgio, Matt, Gabriele Ponti

TL;DR
This paper analyzes correlations between X-ray spectral properties and multiwavelength data in AGN from the CAIXA catalogue, revealing key relationships that inform models of AGN emission and addressing biases in radio-X-ray correlations.
Contribution
It identifies and discusses significant correlations in AGN data, providing insights into the origin of soft excess and radio emission, and critically evaluates biases affecting these correlations.
Findings
Strong anti-correlation between Hβ FWHM and X-ray luminosity ratio.
Correlation between X-ray luminosity and black hole mass.
Distance biases influence radio-X-ray luminosity correlations.
Abstract
We presented CAIXA, a Catalogue of AGN in the XMM-Newton Archive, in a companion paper. Here, a systematic search for correlations between the X-ray spectral properties and the multiwavelength data was performed for the sources in CAIXA. All the significant (>99.9% confidence level) correlations are discussed along with their physical implications on current models of AGN. Two main correlations are discussed in this paper: a) a very strong anti-correlation between the FWHM of the H optical line and the ratio between the soft and the hard X-ray luminosity. Although similar anti-correlations between optical line width and X-ray spectral steepness have already been discussed in the literature (see e.g., Laor et al. 1994, Boller et al. 1996, Brandt et al. 1997), we consider the formulation we present in this paper is more fundamental, as it links model-independent quantities. Coupled…
Peer Reviews
No public reviews on file for this paper yet. If you reviewed it on a platform where reviews are public (OpenReview, ICLR, NeurIPS, ICML), you can paste yours below so the community can read it here.
Videos
No videos yet. Explain this paper in a talk, walkthrough, or lecture? Add one.
Taxonomy
TopicsAstrophysical Phenomena and Observations · Astrophysics and Cosmic Phenomena · Gamma-ray bursts and supernovae
