Table · dataset · 2025
AGN STORM 2. II. HST/COS UV obs. of Mrk817
Listed in IVOA Registry (Virtual Observatory)
We present reverberation mapping measurements for the prominent ultraviolet broad emission lines of the active galactic nucleus Mrk817 using 165 spectra obtained with the Cosmic Origins Spectrograph on the Hubble Space Telescope.
Description
Our ultraviolet observations are accompanied by X-ray, optical, and near-infrared observations as part of the AGN Space Telescope and Optical Reverberation Mapping Program 2 (AGN STORM 2). Using the cross-correlation lag analysis method, we find significant correlated variations in the continuum and emission-line light curves.
We measure rest-frame delayed responses between the far-ultraviolet continuum at 1180{AA} and Ly{alpha}{lambda}1215{AA} (10.4_-1.4_^+1.6^days), NV{lambda}1240{AA} (15.5_-4.8_^+1.0^days), SiIV+]OIV{lambda}1397{AA} (8.2_-1.4_^+1.4^days), CIV{lambda}1549{AA} (11.8_-2.8_^+3.0^days), and HeII{lambda}1640{AA} (9.0_-1.9_^+4.5^days) using segments of the emission-line profile that are unaffected by absorption and blending, which results in sampling different velocity ranges for each line.
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However, we find that the emission-line responses to continuum variations are more complex than a simple smoothed, shifted, and scaled version of the continuum light curve. We also measure velocity-resolved lags for the Ly{alpha} and CIV emission lines. The lag profile in the blue wing of Ly{alpha} is consistent with virial motion, with longer lags dominating at lower velocities, and shorter lags at higher velocities.
The CIV lag profile shows the signature of a thick rotating disk, with the shortest lags in the wings, local peaks at +/-1500km/s, and a local minimum at the line center. The other emission lines are dominated by broad absorption lines and blending with adjacent emission lines. These require detailed models, and will be presented in future work.
Links
Where it is published
- Reference page cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/948/85 ↗
landing page · from IVOA Registry
Documentation and papers
- ADS 2023ApJ...948...85H ui.adsabs.harvard.edu/abs/2023ApJ...948...85H ↗
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/948/85 ↗
catalogue entry · from IVOA Registry
Topics
- Stated by source
- Uv
- From keywords
- Astronomy & Astrophysics
- Inferred from text
- Astronomical sciences 74%
Provenance · 1 source records, 9 field assertions
| Source | Key | Last seen | Raw |
|---|---|---|---|
| IVOA Registry (Virtual Observatory) | ivo://cds.vizier/j/apj/948/85 | 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 (74%) |
| concepts[field].local:field:astronomy | mapping · IVOA Registry | connector:ivoa_registry@1.0.0 | |
| concepts[modality].ivoa_waveband:uv | 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 |