The DOI matches its Crossref record; 2 of the 2 references it cites were found in a registry or an index.
THE TIGHT RELATION BETWEEN X-RAY AND ULTRAVIOLET LUMINOSITY OF QUASARS
Open accessAbstract
The observed relation between the soft X-ray and the optical-ultraviolet emission in active galactic nuclei (AGNs) is nonlinear and it is usually parametrized as a dependence between the logarithm of the monochromatic luminosity at 2500 Å and at 2 keV. Previous investigations have found that the dispersion of this relation is rather high (∼0.35–0.4 in log units), which may be caused by measurement uncertainties, variability, and intrinsic dispersion due to differences in the AGN physical properties (e.g., different accretion modes). We show that, once optically selected quasars with homogeneous SED and X-ray detection are selected, and dust reddened and/or gas obscured objects are not included, the measured dispersion drops to significantly lower values (i.e., ∼0.21–0.24 dex). We show that the residual dispersion is due to some extent to variability, and to remaining measurement uncertainties. Therefore, the real physical intrinsic dispersion should be dex. Such a tight relation, valid over four decades in luminosity, must be the manifestation of an intrinsic (and universal) physical relation between the disk, emitting the primary radiation, and the hot electron corona emitting X-rays.
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Cites
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Hunter, J. D. (2007) · Computing in Science & Engineering · doi:10.1109/mcse.2007.55 · Cited by 39,249
Schlegel, D. J., Finkbeiner, D. P., & Davis, M. (1998) · The Astrophysical Journal · doi:10.1086/305772 · Cited by 15,126 · cited 1×
“Galactic extinction is estimated from Schlegel et al. (1998) for each object.”
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Active galactic nuclei: what’s in a name?
Padovani, P., Alexander, D. M., Assef, R. J., De Marco, B., Giommi, P., Hickox, R. C., Richards, G. T., Smolčić, V., Hatziminaoglou, E., Mainieri, V., et al. (2017) · The Astronomy and Astrophysics Review · doi:10.1007/s00159-017-0102-9 · Cited by 666
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Self-citationCosmological constraints from the Hubble diagram of quasars at high redshifts
Risaliti, G., & Lusso, E. (2019) · Nature Astronomy · doi:10.1038/s41550-018-0657-z · Cited by 371
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Shen, X., Hopkins, P. F., Faucher-Giguère, C.-A., Alexander, D. M., Richards, G. T., Ross, N. P., & Hickox, R. C. (2020) · Monthly Notices of the Royal Astronomical Society · doi:10.1093/mnras/staa1381 · Cited by 323
Metadata
- Authors
- Lusso, E., & Risaliti, G.
- Venue
- The Astrophysical Journal
- Publisher
- American Astronomical Society
- Published
- 2016-03-08
- Volume
- 819
- Issue
- 2
- Pages
- 154
- ISSN
- 0004-637X (ISSN-L)
- 1538-4357
- OpenAlex
- W2304405573
- Cited by
- 233
- References
- 2
- FWCI
- 7.49
- Type
- journal article
- Language
- en
- Open access
- bronze
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- Lusso, E., & Risaliti, G. (2016). THE TIGHT RELATION BETWEEN X-RAY AND ULTRAVIOLET LUMINOSITY OF QUASARS. The Astrophysical Journal. https://doi.org/10.3847/0004-637x/819/2/154
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