Table · dataset · 2022
Host galaxies of luminous type 2 AGNs
Listed in IVOA Registry (Virtual Observatory)
We study the morphological and structural properties of the host galaxies associated with 57 optically selected luminous type 2 active galactic nuclei (AGNs) at z~0.3-0.4: 16 high-luminosity Seyfert 2 [HLSy2, 8.0=<log(L_[OIII]_/L_{sun}_)<8.3] and 41 obscured [QSO2, log(L_[OIII]_/L_{sun}_)>=8.3] quasars.
Description
With this work, the total number of QSO2s at z<1 with parametrized galaxies increases from ~35 to 76. Our analysis is based on Hubble Space Telescope WFPC2 and ACS images that we fit with galfit.
HLSy2s and QSO2s show a wide diversity of galaxy hosts. The main difference lies in the higher incidence of highly disturbed systems among QSO2s. This is consistent with a scenario in which galaxy interactions are the dominant mechanism triggering nuclear activity at the highest AGN power.
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There is a strong dependence of galaxy properties with AGN power (assuming L_[OIII]_ is an adequate proxy). The relative contribution of the spheroidal component to the total galaxy light (B/T) increases with L_[OIII]_. While systems dominated by the spheroidal component spread across the total range of L_[OIII]_, most disc-dominated galaxies concentrate at log(L_[OIII]_/L_{sun}_)<8.6.
This is expected if more powerful AGNs are powered by more massive black holes which are hosted by more massive bulges or spheroids. The average galaxy sizes (<r_e_>) are 5.0+/-1.5kpc for HLSy2s and 3.9+/-0.6kpc for HLSy2s and QSO2s, respectively. These are significantly smaller than those found for QSO1s and narrow-line radio galaxies at similar z.
We put the results of our work in the context of related studies of AGNs with quasar-like luminosities.
Links
Where it is published
- Reference page cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/483/1829 ↗
landing page · from IVOA Registry
Documentation and papers
- ADS 2019MNRAS.483.1829U ui.adsabs.harvard.edu/abs/2019MNRAS.483.1829U ↗
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/mnras/483/1829 ↗
catalogue entry · from IVOA Registry
Topics
- From keywords
- Astronomy & Astrophysics
- Inferred from text
- Image 65%
Provenance · 1 source records, 8 field assertions
| Source | Key | Last seen | Raw |
|---|---|---|---|
| IVOA Registry (Virtual Observatory) | ivo://cds.vizier/j/mnras/483/1829 | 15 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].local:modality:image | enrichment · IVOA Registry | keyword-concept-rules@1.0.0 | title+description (65%) |
| 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 |