Investigating the Variable Continuum Lags in PG 2130+099
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arXiv
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| Format: | Preprint |
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2025
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| _version_ | 1866916672126844928 |
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| author | Miller, Jake A. Cackett, Edward M. Goad, Mike Korista, Kirk T. |
| author_facet | Miller, Jake A. Cackett, Edward M. Goad, Mike Korista, Kirk T. |
| contents | Broadband photometric reverberation mapping (RM) provides a measure of the size of the continuum-emitting region in active galactic nuclei (AGN). Previous monitoring campaigns of PG 2130+099 disagree as to whether the continuum emitting region size is consistent with that predicted for a standard optically thick geometrically thin accretion disk. We present $\sim$6 months of observations from several robotic telescopes, providing the highest cadence and widest wavelength coverage photometric RM study of PG 2130+099 to date. Our results indicate that inferred size of the continuum-emitting region in PG 2130+099, like many recently observed AGN, is larger than the simplest predictions for an irradiated geometrically thin, optically thick accretion disk. We also perform a flux-flux analysis, finding a variable spectrum broadly consistent with a disk, and a constant component with enhanced $\textit{i}$-band emission, potentially due to H$α$. We find some evidence of increasing lag with luminosity, but previous lag measurements are too uncertain to be definitive. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2504_01858 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Investigating the Variable Continuum Lags in PG 2130+099 Miller, Jake A. Cackett, Edward M. Goad, Mike Korista, Kirk T. Astrophysics of Galaxies High Energy Astrophysical Phenomena Broadband photometric reverberation mapping (RM) provides a measure of the size of the continuum-emitting region in active galactic nuclei (AGN). Previous monitoring campaigns of PG 2130+099 disagree as to whether the continuum emitting region size is consistent with that predicted for a standard optically thick geometrically thin accretion disk. We present $\sim$6 months of observations from several robotic telescopes, providing the highest cadence and widest wavelength coverage photometric RM study of PG 2130+099 to date. Our results indicate that inferred size of the continuum-emitting region in PG 2130+099, like many recently observed AGN, is larger than the simplest predictions for an irradiated geometrically thin, optically thick accretion disk. We also perform a flux-flux analysis, finding a variable spectrum broadly consistent with a disk, and a constant component with enhanced $\textit{i}$-band emission, potentially due to H$α$. We find some evidence of increasing lag with luminosity, but previous lag measurements are too uncertain to be definitive. |
| title | Investigating the Variable Continuum Lags in PG 2130+099 |
| topic | Astrophysics of Galaxies High Energy Astrophysical Phenomena |
| url | https://arxiv.org/abs/2504.01858 |