Table · dataset · 2024
[FeII] 1.644um imaging survey of 5 PNe
Listed in IVOA Registry (Virtual Observatory)
Low-ionisation structures (LISs) are commonly found in planetary nebulae (PNe), but they are still poorly understood.
Description
The recent discovery of unforeseen molecular hydrogen gas (H_2_) has impacted what we think we know about these microstructures and PNe. To obtain an overall understanding of LISs, we carried out an [FeII] 1.644um imagery survey in PNe with LISs, with the aim to detect the [FeII] 1.644um emission line, a common tracer of shocks.
We present the first detection of [FeII] 1.644um line directly associated with the LISs in four out of five PNe. The theoretical H I 12-4 recombination line was also computed either from the Brgamma or the Hbeta line and subtracted from the observed narrow-band line fluxes. The [FeII] 1.644um flux ranges from 1 to 40x10^-15^erg/cm^2^/s and the intensity from 2 to 90x10^-5^erg/s/cm^2^/sr.
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The R(Fe)=[FeII]1.644mu/Brgamma line ratio was also computed and found to range between 0.5 and 7. In particular, the [FeII] 1.644um line was detected in NGC 6543 (R(Fe)<0.15), along with the outer pairs of LISs in NGC 7009 (R(Fe)<0.25) and the jet-like LISs in IC 4634 (R(Fe)~1) and in several LISs in NGC 6571 (2<R(Fe)<7). The low R(Fe) result for NGC 6543 is attributed to the UV radiation from the central star.
In contrast, the higher values in NGC 6571 and IC 4634 are indicative of shocks. The moderate R(Fe) in NGC 7009 likely indicates the contribution of both mechanisms.
Links
Where it is published
- Reference page cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/689/A70 ↗
landing page · from IVOA Registry
Documentation and papers
- ADS 2024A&A...689A..70A ui.adsabs.harvard.edu/abs/2024A%26A...689A..70A ↗
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/a%2Ba/689/a70 ↗
catalogue entry · from IVOA Registry
Topics
- Stated by source
- Infrared
- From keywords
- Astronomy & Astrophysics
- Inferred from text
- Astronomical sciences 75% · Imaging 75%
Provenance · 1 source records, 10 field assertions
| Source | Key | Last seen | Raw |
|---|---|---|---|
| IVOA Registry (Virtual Observatory) | ivo://cds.vizier/j/a+a/689/a70 | 12 d ago | JSON v1 |
| Field | Assertion | Extractor | Evidence |
|---|---|---|---|
| access_level | source · IVOA Registry | connector:ivoa_registry@1.0.0 | |
| concepts[field].anzsrc:group:5101 | enrichment · IVOA Registry | taxonomy-embedding@1.0.0 | title+keywords+description (75%) |
| 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].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 |