Table · dataset · 2024
LEGA-C parameters for 877 galaxies
Listed in IVOA Registry (Virtual Observatory)
Description
Dynamical models for 673 galaxies at z=0.6-1.0 with spatially resolved (long-slit) stellar kinematic data from LEGA-C are used to calibrate virial mass estimates defined as M_vir_=K{sigma}'_*,int_^2^R, with Ka scaling factor, {sigma}'_*,int_ the spatially integrated stellar velocity second moment from the LEGA-C survey, and R the effective radius measured from a Sersic profile fit to Hubble Space Telescope imaging. The sample is representative for M*>3x10^10^M{sun} and includes all types of galaxies, irrespective of morphology and color.
We demonstrate that using R=Rsma (the semimajor axis length of the ellipse that encloses 50% of the light) in combination with an inclination correction on {sigma}'_*,int_ produces an unbiased Mvir. We confirm the importance of projection effects on {sigma}'_*,int_ by showing the existence of a similar residual trend between virial mass estimates and inclination for the nearby early-type galaxies in the ATLAS3D survey.
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Also, as previously shown, when using a Sersic profile-based R estimate, a Sersic index-dependent correction to account for nonhomology in the radial profiles is required. With respect to analogous dynamical models for low-redshift galaxies from the ATLAS3D survey we find a systematic offset of 0.1dex in the calibrated virial constant for LEGA-C, which may be due to physical differences between the galaxy samples or an unknown systematic error.
Either way, with our work we establish a common mass scale for galaxies across 8Gyr of cosmic time with a systematic uncertainty of at most 0.1dex.
Links
Where it is published
- Reference page cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/936/9 ↗
landing page · from IVOA Registry
Documentation and papers
- ADS 2022ApJ...936....9V ui.adsabs.harvard.edu/abs/2022ApJ...936....9V ↗
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/936/9 ↗
catalogue entry · from IVOA Registry
Topics
- Stated by source
- Optical
- From keywords
- Astronomy & Astrophysics
- Inferred from text
- Imaging 75%
Provenance · 1 source records, 9 field assertions
| Source | Key | Last seen | Raw |
|---|---|---|---|
| IVOA Registry (Virtual Observatory) | ivo://cds.vizier/j/apj/936/9 | 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].ivoa_waveband:optical | source · IVOA Registry | connector:ivoa_registry@1.0.0 | |
| 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 |