Table · dataset · 2023
Sub-damped Ly{alpha} systems in XQ-100 survey
Listed in IVOA Registry (Virtual Observatory)
Sub-damped Lyman {alpha} systems (subDLAs; HI column densities of 19.0<=logN(HI)<20.3) are rarely included in the cosmic HI census performed at redshifts z_abs_>=1.5, yet are expected to contribute significantly to the overall HI mass budget of the Universe.
Description
In this paper, we present a blindly selected sample of 155 subDLAs found along 100 quasar sightlines (with a redshift path-length {Delta}X=475) in the XQ-100 legacy survey to investigate the contribution of subDLAs to the H I mass density of the Universe.
The impact of X-Shooter's spectral resolution on Ly {alpha} absorber identification is evaluated, and found to be sufficient for reliably finding absorbers down to a column density of logN(HI)>=18.9. We compared the implications of searching for subDLAs solely using HI absorption versus the use of metal lines to confirm the identification, and found that metal-selection techniques would have missed 75 subDLAs. Using a bootstrap Monte Carlo simulation, we computed the column density distribution function (f(N, X)) and the cosmological H I mass density (Omega_HI_) of subDLAs and compared with our previous work based on the XQ-100 damped Lyman {alpha} systems.
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We do not find any significant redshift evolution in f(N, X) or Omega_HI_ for subDLAs. However, subDLAs contribute 10-20 per cent of the total Omega_HI_ measured at redshifts 2<z<5, and thus have a small but significant contribution to the HI budget of the Universe.
Links
Where it is published
- Reference page cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/488/4356 ↗
landing page · from IVOA Registry
Documentation and papers
- ADS 2019MNRAS.488.4356B ui.adsabs.harvard.edu/abs/2019MNRAS.488.4356B ↗
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/488/4356 ↗
catalogue entry · from IVOA Registry
Topics
- Stated by source
- Radio
- From keywords
- Astronomy & Astrophysics
- Inferred from text
- Astronomical sciences 71% · Simulation 75%
Provenance · 1 source records, 10 field assertions
| Source | Key | Last seen | Raw |
|---|---|---|---|
| IVOA Registry (Virtual Observatory) | ivo://cds.vizier/j/mnras/488/4356 | 13 d ago | JSON v1 |
| Field | Assertion | Extractor | Evidence |
|---|---|---|---|
| access_level | source · IVOA Registry | connector:ivoa_registry@1.0.0 | |
| concepts[field].anzsrc:group:5101 | enrichment · IVOA Registry | taxonomy-embedding@1.1.0 | title+keywords+description (71%) |
| concepts[field].local:field:astronomy | mapping · IVOA Registry | connector:ivoa_registry@1.0.0 | |
| concepts[method].local:method:simulation | enrichment · IVOA Registry | keyword-concept-rules@1.0.0 | title+description (75%) |
| concepts[modality].ivoa_waveband:radio | 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 |