Table · dataset · 2023
Census of circumgalactic MgII at redshift z=<0.5
Listed in IVOA Registry (Virtual Observatory)
This paper presents a survey of MgII absorbing gas in the vicinity of 380 random galaxies, using 156 background quasi-stellar objects (QSOs) as absorption-line probes.
Description
The sample comprises 211 isolated (73 quiescent and 138 star-forming galaxies) and 43 non-isolated galaxies with sensitive constraints for both MgII absorption and H{alpha} emission. The projected distances span a range from d=9 to 497kpc, redshifts of the galaxies range from z=0.10 to 0.48, and rest-frame absolute B-band magnitudes range from M_B_=-16.7 to -22.8.
Our analysis shows that the rest-frame equivalent width of MgII, W_r_(2796), depends on halo radius (R_h_), B-band luminosity(L_B_), and stellar mass (M_star_) of the host galaxies, and declines steeply with increasing d for isolated, star-forming galaxies. At the same time, W_r_(2796) exhibits no clear trend for either isolated, quiescent galaxies or non-isolated galaxies. In addition, the covering fraction of MgII absorbing gas <{kappa}> is high with <{kappa}>>=60 per cent at <40kpc for isolated galaxies and declines rapidly to <{kappa}>~0 at d>=100 kpc.
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Within the gaseous radius, the incidence of MgII gas depends sensitively on both M_star_ and the specific star formation rate inferred from H{alpha}. Different from what is known for massive quiescent haloes, the observed velocity dispersion of MgII absorbing gas around star-forming galaxies is consistent with expectations from virial motion, which constrains individual clump mass to m_cl_>~10^5^M_{sun}_ and cool gas accretion rate of ~0.7-2M_{sun}_/yr.
Finally, we find no strong azimuthal dependence of MgII absorption for either star-forming or quiescent galaxies. Our results demonstrate that multiple parameters affect the properties of gaseous haloes around galaxies and highlight the need of a homogeneous, absorption-blind sample for establishing a holistic description of chemically enriched gas in the circumgalactic space.
Links
Where it is published
- Reference page cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/502/4743 ↗
landing page · from IVOA Registry
Documentation and papers
- ADS 2021MNRAS.502.4743H ui.adsabs.harvard.edu/abs/2021MNRAS.502.4743H ↗
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/502/4743 ↗
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/mnras/502/4743 | 10 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:optical | source · IVOA Registry | connector:ivoa_registry@1.0.0 | |
| concepts[modality].ivoa_waveband:uv | 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 |