Table · dataset · 2023
GCLASS HST grism data of z~1 clusters
Listed in IVOA Registry (Virtual Observatory)
We present and publicly release (www.gclasshst.com) the first spatially resolved H{alpha} maps of star-forming cluster galaxies at z~1, made possible with the Wide Field Camera 3 (WFC3) G141 grism on the Hubble Space Telescope (HST).
Description
Using a similar but updated method to 3D-HST in the field environment, we stack the H{alpha} maps in bins of stellar mass, measure the half-light radius of the H{alpha} distribution, and compare it to the stellar continuum.
The ratio of the H{alpha} to stellar continuum half-light radius, R[H{alpha}/C]=R_eff,H{alpha}_/R_eff,Cont_, is smaller in the clusters by (6+/-9)%, but statistically consistent within 1{sigma} uncertainties. A negligible difference in R[H{alpha}/C] with environment is surprising, given the higher quenched fractions in the clusters relative to the field. We postulate that the combination of high quenched fractions and no change in R[H{alpha}/C] with environment can be reconciled if environmental quenching proceeds rapidly.
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We investigate this hypothesis by performing similar analysis on the spectroscopically confirmed, recently quenched cluster galaxies. 87% have H{alpha} detections, with star formation rates 8+/-1 times lower than star-forming cluster galaxies of similar stellar mass. Importantly, these galaxies have an R[H{alpha}/C] that is (81+/-8)% smaller than coeval star- forming field galaxies at fixed stellar mass. This suggests the environmental quenching process occurred outside-in.
We conclude that disk truncation due to ram pressure stripping is occurring in cluster galaxies at z~1, but more rapidly and/or efficiently than in z<~0.5 clusters, such that the effects on R[H{alpha}/C] become observable just after the cluster galaxy has recently quenched.
Links
Where it is published
- Reference page cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/923/222 ↗
landing page · from IVOA Registry
Documentation and papers
- ADS 2021ApJ...923..222M ui.adsabs.harvard.edu/abs/2021ApJ...923..222M ↗
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/923/222 ↗
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/apj/923/222 | 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:infrared | source · IVOA Registry | connector:ivoa_registry@1.0.0 | |
| concepts[modality].ivoa_waveband:optical | 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 |