Table · dataset · 2024
Spectra of 3 PN with [WC] central star
Listed in IVOA Registry (Virtual Observatory)
We present spectroscopy of three hydrogen-deficient central stars of faint planetary nebulae, with effective temperatures (Teff) in excess of 100000K.
Description
The nucleus of RaMul 2 is a Population II Wolf-Rayet star of spectral type [WC], and the central stars of Abell 25 and StDr 138 are two new members of the PG1159 class. Our spectral analyses reveal that their atmospheres have a similar chemical composition.
They are dominated by helium and carbon, which was probably caused by a late helium-shell flash. Coincidentally, the three stars have similar masses of about M=0.53M_{sun}_ and, hence, form a post-AGB evolutionary sequence of an initially early-K type main-sequence star with M=0.8M_{sun}_. The central stars cover the period during which the luminosity fades from about 3000 to 250L_{sun}_ and the radius shrinks from about 0.15 to 0.03R_{sun}_.
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The concurrent increase of the surface gravity during this interval from logg=5.8 to 7.2 causes the shutdown of the stellar wind from an initial mass-loss rate of log(dM/dt)/(M_{sun}_/yr)=-6.4, as measured for the [WC] star. Along the contraction phase, we observe an increase of Teff from 112000K, marked by the [WC] star, to the maximum value of 140000K and a subsequent cooling to 130000K, marked by the two PG1159 stars.
Links
Where it is published
- Reference page cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/686/A29 ↗
landing page · from IVOA Registry
Documentation and papers
- ADS 2024A&A...686A..29W ui.adsabs.harvard.edu/abs/2024A%26A...686A..29W ↗
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/686/a29 ↗
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/a+a/686/a29 | 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 |