التفاصيل البيبلوغرافية
| العنوان: |
Unveiling energy pathways in AGN accretion flows with the warm corona model for the soft excess. |
| المؤلفون: |
Ballantyne, D R, Sudhakar, V, Fairfax, D, Bianchi, S, Czerny, B, De Rosa, A, De Marco, B, Middei, R, Palit, B, Petrucci, P -O, Różańska, A, Ursini, F |
| المصدر: |
Monthly Notices of the Royal Astronomical Society; May2024, Vol. 530 Issue 2, p1603-1623, 21p |
| مصطلحات موضوعية: |
ACCRETION disks, BLACK holes, ENERGY dissipation, SEYFERT galaxies, ACTIVE galaxies, ACTIVE galactic nuclei, SOLAR corona |
| مستخلص: |
The soft excess in active galactic nuclei (AGNs) may arise through a combination of relativistic reflection and the effects of a warm corona at the surface of the accretion disc. Detailed examination of the soft excess can therefore constrain models of the transport and dissipation of accretion energy. Here, we analyse 34 XMM–Newton observations from 14 type 1 AGNs with the reXcor spectral model that self-consistently combines emission from a warm corona with relativistic reflection assuming a lamppost corona. The model divides accretion energy between the disc, the warm corona, and the lamppost. The XMM–Newton observations span a factor of 188 in Eddington ratio (λobs) and 350 in black hole mass, and we find that a warm corona is a significant contributor to the soft excess for 13 of the 14 AGNs with a mean warm corona heating fraction of 0.51. The reXcor fits reveal that the fraction of accretion energy dissipated in the lamppost is anticorrelated with λobs. In contrast, the relationship between λobs and both the optical depth and the heating fraction of the warm corona appears to transition from an anticorrelation to a correlation at λobs,t ≈ 0.15. Therefore, at least one other physical process in addition to the accretion rate is needed to explain the evolution of the warm corona. Overall, we find that a warm corona appears to be a crucial depository of accretion energy in AGNs across a broad range of λobs and black hole mass. [ABSTRACT FROM AUTHOR] |
|
Copyright of Monthly Notices of the Royal Astronomical Society is the property of Oxford University Press / USA and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) |
| قاعدة البيانات: |
Complementary Index |
