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The Relationship Between the Emission-Line Spectra and X-Ray/UV Continuum1

  • Youjun Lu (a1) and Tinggui Wang (a1)

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According to photoionization calculations, the broad emission-line (BEL) spectrum depends not only on the physical conditions of line-emitting gas, but also on the spectral shape of incident ionizing continuum, especially from the UV to X-ray. Analysis of emission-line spectra and their correlations with the continuum, therefore, provide a way of probing the anisotropy of ionizing continuum on the BLR scale, which is predicted by current models. Previous works have concentrated on explaining the Baldwin effect, an inverse correlation between equivalent width and continuum luminosity. In this contribution, we present the results of an analysis of 75 AGNs which have well-determined soft X-ray spectral parameters from ROSAT and UV line and continuum measurements.

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1

This work is supported by the National Natural Science Foundation of China.

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References

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Brinkmann, W., & Siebert, J. 1994, A&A, 285, 812.
Brinkmann, W., Bergeron, J., & Siebert, J. 1995, A&A, 293, 985.
Laor, A., et al. 1994, ApJ, 420, 110.
Laor, A., et al. 1995, ApJS, 99, 1.
Mathews, W.G., & Ferland, G.J. 1987, ApJ, 323, 456.
Wang, T., Brinkmann, W., & Bergeron, J. 1996, A&A, 309, 81.

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The Relationship Between the Emission-Line Spectra and X-Ray/UV Continuum1

  • Youjun Lu (a1) and Tinggui Wang (a1)

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