Table · dataset · 2022
3yrs spectroscopic light curves of PG0026+129
Listed in IVOA Registry (Virtual Observatory)
We report on the results of a new spectroscopic monitoring campaign of the quasar PG 0026+129 at the Calar Alto Observatory 2.2m telescope from 2017 July to 2020 February.
Description
Significant variations in the fluxes of the continuum and broad emission lines, including H{beta} and HeII, were observed in the first and third years, and clear time lags between them are measured. The broad H{beta} line profile consists of two Gaussian components: an intermediate-width H{beta}_IC_ with an FWHM of 1964+/-18km/s and another very broad H{beta}_VBC_ with an FWHM of 7570+/-83km/s.
H{beta}_IC_ has long time lags of ~40-60days in the rest frame, while H{beta}_VBC_ shows nearly zero time delay with respect to the optical continuum at 5100{AA}. The velocity-resolved delays show consistent results: lags of ~30-50days at the core of the broad H{beta} line and roughly zero lags at the wings. H{beta}_IC_ has a redshift of ~400km/s, which seems to be stable for nearly 30yr by comparing with archived spectra, and may originate from an infall.
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The rms spectrum of H{beta}_VBC_ shows a double-peaked profile with brighter blue peak and extended red wing in the first year, which matches the signature of a thin disk. Both the double-peaked profile and the near-zero lag suggest that H{beta}_VBC_ comes from a region associated with the part of the accretion disk that emits the optical continuum. Adopting the FWHM (in the rms spectrum) and the time lag measured for the total H{beta} line, and a virial factor of 1.5, we obtain a virial mass of 2.89_-0.69_^+0.60^x10^7^M_{sun}_ for the central black hole in this quasar.
Links
Where it is published
- Reference page cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/905/75 ↗
landing page · from IVOA Registry
Documentation and papers
- ADS 2020ApJ...905...75H ui.adsabs.harvard.edu/abs/2020ApJ...905...75H ↗
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/905/75 ↗
catalogue entry · from IVOA Registry
Topics
- Stated by source
- Optical
- From keywords
- Astronomy & Astrophysics
- Inferred from text
- Astronomical sciences 73%
Provenance · 1 source records, 9 field assertions
| Source | Key | Last seen | Raw |
|---|---|---|---|
| IVOA Registry (Virtual Observatory) | ivo://cds.vizier/j/apj/905/75 | 13 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@1.1.0 | title+keywords+description (73%) |
| 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 |