Table · dataset · 2023
YFOSC light curves of PG 0923+201 and PG 1001+291
Listed in IVOA Registry (Virtual Observatory)
We report the results of a multiyear spectroscopic and photometric monitoring campaign of two luminous quasars, PG0923+201 and PG1001+291, both located at the high-luminosity end of the broad-line region (BLR) size-luminosity relation with optical luminosities above 1045erg/s.
Description
PG0923+201 is monitored for the first time, while PG1001+291 was previously monitored but our campaign has a much longer temporal baseline. We detect time lags of variations of the broad H{beta}, H{gamma}, and FeII lines with respect to those of the 5100{AA} continuum.
The velocity-resolved delay map of H{beta} in PG0923+201 indicates a complicated structure with a mix of Keplerian disk-like motion and outflow, and the map of H{beta} in PG1001+291 shows a signature of Keplerian disk-like motion. Assuming a virial factor of fBLR=1 and FWHM line widths, we measure the black hole mass to be 118_-16_^+11^x10^7^M{sun} for PG0923+201 and 3.33_-0.54_^+0.62^x10^7^M{sun} for PG1001+291. Their respective accretion rates are estimated to be 0.21_-0.07_^+0.06^xL_Edd_c^-2^ and 679_-227_^+259^xL_Edd_c^-2^, indicating that PG0923+201 is a sub-Eddington accretor and PG1001+291 is a super-Eddington accretor.
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While the H{beta} time lag of PG0923+201 agrees with the size-luminosity relation, the time lag of PG1001+291 shows a significant deviation, confirming that in high-luminosity active galactic nuclei (AGNs), the BLR size depends on both luminosity and Eddington ratio. Black hole mass estimates from single-AGN spectra will be overestimated at high luminosities and redshifts if this effect is not taken into account.
Links
Where it is published
- Reference page cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/920/9 ↗
landing page · from IVOA Registry
Documentation and papers
- ADS 2021ApJ...920....9L ui.adsabs.harvard.edu/abs/2021ApJ...920....9L ↗
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/920/9 ↗
catalogue entry · from IVOA Registry
Topics
- From keywords
- Astronomy & Astrophysics
- Inferred from text
- Astronomical sciences 72%
Provenance · 1 source records, 10 field assertions
| Source | Key | Last seen | Raw |
|---|---|---|---|
| IVOA Registry (Virtual Observatory) | ivo://cds.vizier/j/apj/920/9 | 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@1.1.0 | title+keywords+description (72%) |
| 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 | |
| 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 |