Projects per year
Abstract
We show recent detections of inter-band continuum lags in three AGN (NGC 5548, NGC 2617, and MCG+08-11-011), which provide new constraints on the temperature profiles and absolute sizes of the accretion disks. We find lags larger than would be predicted for standard geometrically thin, optically thick accretion disks by factors of 2.3–3.3. For NGC 5548, the data span UV through optical/near-IR wavelengths, and we are able to discern a steeper temperature profile than the T ~ R−3/4 expected for a standard thin disk. Using a physical model, we are also able to estimate the inclinations of the disks for two objects. These results are similar to those found from gravitational microlensing of strongly lensed quasars, and provide a complementary approach for investigating the accretion disk structure in local, low luminosity AGN.
Original language | English |
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Title of host publication | Frontiers in Astronomy and Space Sciences |
Publisher | Frontiers Media S. A. |
Number of pages | 6 |
Volume | 4 |
DOIs | |
Publication status | Published - 5 Dec 2017 |
Event | Quasars At All Cosmic Epochs - Cultural Centre San Gaetano, Padova, Italy Duration: 2 Apr 2017 → 7 Apr 2017 https://indico.ict.inaf.it/event/338/ |
Conference
Conference | Quasars At All Cosmic Epochs |
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Country/Territory | Italy |
City | Padova |
Period | 2/04/17 → 7/04/17 |
Internet address |
Keywords
- AGN continuum
- Galaxies: active
- Individual: NGC5548, NGC2617, MCG+08-11-011
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Dive into the research topics of 'Continuum reverberation mapping of AGN accretion disks'. Together they form a unique fingerprint.Projects
- 1 Finished
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Astronomy at St Andrews 2015-2018: Astronomy at St Andrews 2015-2018
Jardine, M. M. (PI), Cameron, A. C. (CoI), Cyganowski, C. J. (CoI), Horne, K. D. (CoI) & Wood, K. (CoI)
Science & Technology Facilities Council
1/04/15 → 31/03/18
Project: Standard