Table · dataset · 2024
Spitzer/IRS spectral stacking analysis of GOALS gal.
Listed in IVOA Registry (Virtual Observatory)
We present the results of a stacking analysis performed on Spitzer/Infrared Spectrograph high-resolution mid-infrared (mid-IR) spectra of luminous infrared galaxies (LIRGs) in the Great Observatories All-Sky LIRG Survey.
Description
By binning in relation to mid-IR active galactic nucleus (AGN) fraction and stacking spectra, we detect bright emission lines [NeII] and [NeIII], which trace star formation, and fainter emission lines [NeV] and [OIV], which trace AGN activity, throughout the sample.
We find that the [NeII] luminosity is fairly constant across all AGN fraction bins, while the [OIV] and [NeV] luminosities increase by over an order of magnitude. Our measured average line ratios, [NeV]/[NeII] and [OIV]/[NeII], at low AGN fraction are similar to HII galaxies, while the line ratios at high AGN fraction are similar to LINERs and Seyferts. We decompose the [OIV] luminosity into star formation and AGN components by fitting the [OIV] luminosity as a function of the [NeII] luminosity and the mid-IR AGN fraction.
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The [OIV] luminosity in LIRGs is dominated by star formation for mid-IR AGN fractions <~0.3. With the corrected [OIV] luminosity, we calculate black hole accretion rates (BHARs) ranging from 10^-5^M_{sun}_/yr at low AGN fractions to 0.2M_{sun}_/yr at the highest AGN fractions. We find that using the [OIV] luminosity, without correcting for star formation, can lead to overestimation of the BHAR by up to a factor of 30 in starburst-dominated LIRGs.
Finally, we show that the BHAR/star formation rate ratio increases by more than three orders of magnitude as a function of mid-IR AGN fraction in LIRGs.
Links
Where it is published
- Reference page cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/934/27 ↗
landing page · from IVOA Registry
Documentation and papers
- ADS 2022ApJ...934...27S ui.adsabs.harvard.edu/abs/2022ApJ...934...27S ↗
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/934/27 ↗
catalogue entry · from IVOA Registry
Topics
- Stated by source
- Infrared
- From keywords
- Astronomy & Astrophysics
Provenance · 1 source records, 8 field assertions
| Source | Key | Last seen | Raw |
|---|---|---|---|
| IVOA Registry (Virtual Observatory) | ivo://cds.vizier/j/apj/934/27 | 11 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 | |
| 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 |