Table · dataset · 2022
Bulge-disk decomposition of H-KPAIR sample
Listed in IVOA Registry (Virtual Observatory)
We present a study of the bulge-to-total ratio (B/T) of a Ks-band-selected sample of 88 close major-merger pairs of galaxies (H-KPAIR), based on two-dimensional decompositions of SDSS r-band images with GALFIT.
Description
We investigate the dependence of the interaction-induced specific star formation rate enhancement (sSFR_enh_) on the B/T ratio, and the effects of this dependence on the differences between star-forming galaxies (SFGs) in spiral+spiral (S+S) and spiral+elliptical (S+E) pairs.
Of all the 132 spiral galaxies in H-KPAIR, the 44 in S+E pairs show higher B/T than those in the 44 S+S pairs, with means of B/T=0.35+/-0.05 and B/T=0.26+/-0.03, respectively. There is a strong negative dependence of sSFRenh on the B/T ratio, and only paired SFGs with B/T<0.3 show significant (>5{sigma}) enhancement. Paired SFGs in S+S pairs show a similar trend, and many disky SFGs (B/T<0.1) in S+S pairs have strong sSFR enhancements (sSFR_enh_>0.7dex).
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For SFGs in S+E pairs, the sSFR has no clear B/T dependence, nor any significant enhancement in any B/T bin. Disky SFGs in S+S pairs show significant (>4{sigma}) enhancement in molecular gas content (M_H2_/M_star_), while SFGs in S+E pairs have no such enhancement in any B/T bin. No significant enhancement of the total gas content (M_gas_/M_star_) is found in any B/T bin for paired galaxies.
The star formation efficiency of either the total gas (SFE_gas_=SFR/M_gas_) or molecular gas (SFE_H2_=SFR/M_H2_) does not depend on the B/T ratio. The only significant (>4{sigma}) SFE enhancement found for paired SFGs is the SFEgas for disky SFGs in S+S pairs.
Links
Where it is published
- Reference page cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJS/261/34 ↗
landing page · from IVOA Registry
Documentation and papers
- ADS 2022ApJS..261...34H ui.adsabs.harvard.edu/abs/2022ApJS..261...34H ↗
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/apjs/261/34 ↗
catalogue entry · from IVOA Registry
Topics
- From keywords
- Astronomy & Astrophysics
- Inferred from text
- Image 65%
Provenance · 1 source records, 10 field assertions
| Source | Key | Last seen | Raw |
|---|---|---|---|
| IVOA Registry (Virtual Observatory) | ivo://cds.vizier/j/apjs/261/34 | 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:infrared | source · 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:image | enrichment · IVOA Registry | keyword-concept-rules@1.0.0 | title+description (65%) |
| 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 |