Table · dataset · 2024
Nuclear properties of highly accreting AGNs
Listed in IVOA Registry (Virtual Observatory)
Our understanding of highly accreting AGNs is hampered by the lack of a complete systematic investigation in terms of their main spectral and variability properties, and by the relative paucity of them in the local Universe, especially those powered by supermassive black holes with M_BH_>10^8^M_{sun}_.
Description
To overcome this limitation, we present here the X-ray spectral analysis of a new, large sample of 61 highly accreting AGNs named as the XMM-Newton High-Eddington Serendipitous AGN Sample, or X-HESS, obtained by cross-correlating the 11th release of the XMM-Newton serendipitous catalogue and the catalogue of spectral properties of quasars from the SDSS DR14.
The X-HESS AGNs are spread across wide intervals with a redshift of 0.06<z<3.3, a black hole mass of 6.8<log(M_BH_/M_{sun}_)<9.8, a bolometric luminosity of 44.7<logL_bol_[erg/s]<48.3, and an Eddington ratio of -0.2<log{lambda}_Edd_<0.5, and more than one third of these AGNs can rely on multiple observations at different epochs, allowing us to investigate also their variability. We find a large scatter in the GAMMA-{lambda}_Edd_ distribution of the highly accreting X-HESS AGNs.
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A significant correlation is only found by considering a sample of lower-{lambda}_Edd_ AGNs with {lambda}_Edd_<=0.3. The GAMMA-{lambda}_Edd_ relation appears to be more statistically sound for AGNs with lower M_BH_ and/or L_bol_. We investigate the possibility of transforming the GAMMA-{lambda}_Edd_ plane into a fully epoch-dependent frame by calculating the Eddington ratio from the simultaneous optical/UV data from the optical monitor, {lambda}_Edd,O_/UV.
Finally, we also get a mild indication of a possible anti-correlation between Gamma and the strength of the soft excess.
Links
Where it is published
- Reference page cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/689/A337 ↗
landing page · from IVOA Registry
Documentation and papers
- ADS 2024A&A...689A.337L ui.adsabs.harvard.edu/abs/2024A%26A...689A.337L ↗
publication · from IVOA Registry
Catalogue records · 2
- VOResource record dc.g-vo.org/oai.xml?verb=GetRecord&metadataPrefix=ivo_vor&identifier=ivo%3… ↗
metadata API · from IVOA Registry
- Registry record (GAVO) dc.g-vo.org/I/cds.vizier/j/a%2Ba/689/a337 ↗
catalogue entry · from IVOA Registry
Topics
- From keywords
- Astronomy & Astrophysics
Provenance · 1 source records, 9 field assertions
| Source | Key | Last seen | Raw |
|---|---|---|---|
| IVOA Registry (Virtual Observatory) | ivo://cds.vizier/j/a+a/689/a337 | 12 d ago | JSON v1 |
| Field | Assertion | Extractor | Evidence |
|---|---|---|---|
| access_level | source · IVOA Registry | connector:ivoa_registry@1.0.0 | |
| concepts[field].local:field:astronomy | mapping · IVOA Registry | connector:ivoa_registry@1.0.0 | |
| concepts[modality].ivoa_waveband:gamma-ray | source · IVOA Registry | connector:ivoa_registry@1.0.0 | |
| concepts[modality].ivoa_waveband:x-ray | source · IVOA Registry | connector:ivoa_registry@1.0.0 | |
| description | source · IVOA Registry | connector:ivoa_registry@1.0.0 | rr.resource.res_description |
| license_text | source · IVOA Registry | connector:ivoa_registry@1.0.0 | |
| publication_date | source · IVOA Registry | connector:ivoa_registry@1.0.0 | |
| title | source · IVOA Registry | connector:ivoa_registry@1.0.0 | rr.resource.res_title |
| updated_date | source · IVOA Registry | connector:ivoa_registry@1.0.0 |