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On the Physical Mechanism Underlying PC1 and Baldwin Effect in Quasars

  • Xiao-Bo Dong (a1), Ting-Gui Wang (a1), Jian-Guo Wang (a1) (a2), Xiaohui Fan (a3), Huiyuan Wang (a1), Hongyan Zhou (a1) and Weimin Yuan (a2)...

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Recent work (Baskin & Laor 2004; Dong et al. 2009a, b) suggests that the Eddington ratio (lL/LEdd) is the origin of all the significant first-order object-to-object variations of quasar spectral properties from the zeroth-order similarity of AGN spectra; specifically, this includes the PC1 of Boroson & Green (1992), the classic or inverse Baldwin effect (Baldwin 1977), and even blueshifting (i.e., blue asymmetry) of high-ionization emission lines (Dong et al. 2009c).

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References

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Baldwin, J. A. 1977, ApJ, 214, 679
Baldwin, J. A., et al. 1995, ApJ, 455, 119
Baskin, A. & Laor, A. 2004, MNRAS, 350, L31
Boroson, T. A & Green, R. F. 1992, ApJS, 80, 109
Dong, X.-B., Wang, T., Wang, J., Fan, X., Wang, H., Zhou, H., & Yuan, W. 2009a, ApJ, 703, L1
Dong, X., et al. 2009b, submitted to ApJ [arXiv: 0903.5020]
Dong, X., et al. 2009c, in The Origin and Physical Mechanism of the Ensemble Baldwin Effect, ed. Wang, W., Yang, Z., & Chen, Z. (San Francisco: ASP), p. 83
Korista, K. T. 1999 in Quasars and Cosmology, (San Francisco: ASP), p. 165
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