Table · dataset · 2023
Reduced GTC spectrum towards Q1218+0832
Listed in IVOA Registry (Virtual Observatory)
We report on further observations of the field of the quasar Q1218+0832.
Description
Geier et al. (2019A&A...625L...9G) presented the discovery of the quasar resulting from a search for quasars reddened and dimmed by dust in foreground Damped Lyman-alpha Absorbers (DLAs). The DLA is remarkable by having a very large HI column density close to 10^22^cm^-2^.
Its dust extinction curve shows the 2175{AA}-bump known from the Local Group. It also shows absorption from cold gas exemplified by CI and CO-molecules. We here present narrow-band observations of the field of Q1218+0832 and also use archival HST image to search for the galaxy counterpart of the DLA.
Read the rest (2 more)
No emission from the DLA galaxy is found neither in the narrow-band imaging nor in the HST image. In the HST image, we can probe down to an impact parameter of 0.3arcsec and a 3-sigma detection limit of 26.8 mag per arcsec^2^. In the narrow-band image, we probe down to 0 arcsec impact parameter and detect nothing down to a 3-sigma detection limit of about 3*10^-17^erg/s/cm^2^.
We do detect a bright Lyman-alpha emitter 59arcsec south of Q1218+0832 with a flux of 3*10^-16^erg/s/cm^2^. We conclude that the DLA galaxy must be located at very small impact parameter (<0.3arcsec, 2.5kpc) or is optically dark. Also, the DLA galaxy most likely is part of a galaxy group.
Links
Where it is published
- Reference page cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/679/A30 ↗
landing page · from IVOA Registry
Documentation and papers
- ADS 2023A&A...679A..30F ui.adsabs.harvard.edu/abs/2023A%26A...679A..30F ↗
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/679/a30 ↗
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/679/a30 | 11 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 (75%) |
| concepts[modality].local:modality:imaging | enrichment · IVOA Registry | keyword-concept-rules@1.0.0 | title+description (75%) |
| 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 |