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Structured coronae of accretion disks
Abstract
A model based on the amplification of magnetic fields by convective motions and differential rotation within a hot (no less than about 1,000,000 K) accretion disk is developed for the fluctuating hard component of intense cosmic X-ray sources such as Cyg X-1. It is shown that field reconnection within the inner portion of the disk is ineffective in limiting field amplification. Magnetic fields may therefore reach strengths comparable to the equipartition value, leading to their emergence through buoyancy in the form of looplike structures and resulting in a very hot (over 100 million K) magnetically confined structured corona similar to the observed structure of solar corona. In particular, the soft X-ray luminosity of the accretion disk determines the dominant energy loss mechanism in loops.
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Citations
Cited by
Collapsars: Gamma‐Ray Bursts and Explosions in “Failed Supernovae”
MacFadyen, A. I., & Woosley, S. E. (1999) · The Astrophysical Journal · doi:10.1086/307790 · Cited by 2,328
Magnetospheric Multiscale Overview and Science Objectives
Burch, J. L., Moore, T. E., Torbert, R. B., & Giles, B. L. (2016) · Space Science Reviews · doi:10.1007/s11214-015-0164-9 · Cited by 1,523
VARIABILITY OF ACTIVE GALACTIC NUCLEI
Ulrich, M.-H., Maraschi, L., & Urry, C. M. (1997) · Annual Review of Astronomy and Astrophysics · doi:10.1146/annurev.astro.35.1.445 · Cited by 937
Ion-supported tori and the origin of radio jets
Rees, M. J., Begelman, M. C., Blandford, R. D., & Phinney, E. S. (1982) · Nature · doi:10.1038/295017a0 · Cited by 829
Soft state of Cygnus X-1: stable disc and unstable corona
Churazov, E., Gilfanov, M., & Revnivtsev, M. (2001) · Monthly Notices of the Royal Astronomical Society · doi:10.1046/j.1365-8711.2001.04056.x · Cited by 309
Metadata
- Authors
- Galeev, A. A., Rosner, R., & Vaiana, G. S.
- Venue
- The Astrophysical Journal
- Publisher
- American Astronomical Society
- Published
- 1979-04
- Volume
- 229
- Pages
- 318
- ISSN
- 0004-637X (ISSN-L)
- 1538-4357
- OpenAlex
- W2069772990
- Cited by
- 683
- References
- 0
- FWCI
- 4.74
- Type
- journal article
- Language
- en
- Open access
- closed
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- Galeev, A. A., Rosner, R., & Vaiana, G. S. (1979). Structured coronae of accretion disks. The Astrophysical Journal. https://doi.org/10.1086/156957
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Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).
Semantic Scholar’s data is described in: Kinney, R., et al. (2023). The Semantic Scholar Open Data Platform. arXiv:2301.10140.
