Table · dataset · 2021
SFR in Local Volume late-type galaxies
Listed in IVOA Registry (Virtual Observatory)
Using a currently most representative sample of 477 late-type galaxies within 11Mpc of the Milky Way with measured star formation rates (SFRs) from the far-ultraviolet (FUV) and H{alpha} emission line fluxes, we select galaxies with the extreme ratios: SFR(H{alpha})/SFR(FUV)>2 and SFR(H{alpha})/SFR(FUV)<1/20.
Description
Each subsample amounts to ~5 per cent of the total number and consists of dwarf galaxies with the stellar masses M*/M_{sun}_=(5.5-9.5)dex.
In spite of a huge difference in their SFR(H{alpha}) activity on a scale of ~10Myr, the temporarily 'excited' and temporarily 'quiescent' galaxies follow one and the same relation between SFR(FUV) and M* on a scale of ~100Myr. Their average specific SFR log[SFR(FUV)/M*]=-10.1+/-0.1yr^-1^) coinsides with the Hubble parameter log(H_0_)=-10.14(yr^-1^). On a scale of t~10Myr, variations of SFR have a moderate flash amplitude of less than one order above the main sequence and a fading amplitude to two orders below the average level.
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In general, both temporarily excited and temporarily quiescent galaxies have almost similar gas fractions as normal main-sequence galaxies, being able to maintain the current rate of star formation on another Hubble time-scale. Ranging the galaxies according to the density contrast produced by the nearest massive neighbour exhibits only a low average excess of SFR caused by tidal interactions.
Links
Where it is published
- Reference page cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/506/1346 ↗
landing page · from IVOA Registry
Documentation and papers
- ADS 2021MNRAS.506.1346K ui.adsabs.harvard.edu/abs/2021MNRAS.506.1346K ↗
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/506/1346 ↗
catalogue entry · from IVOA Registry
Topics
- Stated by source
- Optical
- From keywords
- Astronomy & Astrophysics
Provenance · 1 source records, 8 field assertions
| Source | Key | Last seen | Raw |
|---|---|---|---|
| IVOA Registry (Virtual Observatory) | ivo://cds.vizier/j/mnras/506/1346 | 12 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 | |
| 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 |