Table · dataset · 2022
X-SHOOTER/ALMA QSOs at 5.78<z<7.54. I. NIR sp.
Listed in IVOA Registry (Virtual Observatory)
We present X-SHOOTER near-IR spectroscopy of a large sample of 38 luminous (M_1450_=-29.0 to -24.4) quasars at 5.78<z<7.54, which have complementary [CII]158{mu}m observations from ALMA.
Description
This X-SHOOTER/ALMA sample provides us with the most comprehensive view of reionization-era quasars to date, allowing us to connect the quasar properties with those of its host galaxy. In this work we introduce the sample, discuss data reduction and spectral fitting, and present an analysis of the broad emission line properties.
The measured FeII/MgII flux ratio suggests that the broad-line regions of all quasars in the sample are already enriched in iron. We also find the MgII line to be on average blueshifted with respect to the [CII] redshift with a median of -391km/s. A significant correlation between the MgII-[CII]158{mu}m and CIV-[CII]158{mu}m velocity shifts indicates a common physical origin.
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Furthermore, we fRequently detect large CIV-MgII emission line velocity blueshifts in our sample with a median value of -1848km/s. While we find all other broad emission line properties not to be evolving with redshift, the median CIV-MgII blueshift is much larger than found in low-redshift, luminosity-matched quasars (-800km/s). Dividing our sample into two redshift bins, we confirm an increase of the average CIV-MgII blueshift with increasing redshift.
Future observations of the rest-frame optical spectrum with the James Webb Space Telescope will be instrumental in further constraining the possible evolution of quasar properties in the epoch of reionization.
Links
Where it is published
- Reference page cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/905/51 ↗
landing page · from IVOA Registry
Documentation and papers
- ADS 2020ApJ...905...51S ui.adsabs.harvard.edu/abs/2020ApJ...905...51S ↗
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/apj/905/51 ↗
catalogue entry · from IVOA Registry
Topics
- Stated by source
- Infrared · Millimeter
- From keywords
- Astronomy & Astrophysics
Provenance · 1 source records, 9 field assertions
| Source | Key | Last seen | Raw |
|---|---|---|---|
| IVOA Registry (Virtual Observatory) | ivo://cds.vizier/j/apj/905/51 | 14 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:infrared | source · IVOA Registry | connector:ivoa_registry@1.0.0 | |
| concepts[modality].ivoa_waveband:millimeter | 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 |