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- W77477951 abstract "One of the principal problems of investigation of AGNs is to understand the nature of the central objects and the physical processes which yield their gigantic luminosities. This requires us to consider the innermost parts of AGNs (3–30 gravitational radii, i.e. ≲ 10 16 cm: angular size less than 1 milliarcsecond). 1–3 d variations of the relative shape of broad emission line profiles of active galactic nuclei (AGN) are perhaps the most informative probe of the innermost parts of AGNs (r = 10 15–16 cm from the centre). Optimal objects for these observations are Sy 1.5 with strong variations of the non-thermal continuum (e.g. NGC 4151). The expected amplitude of the variations ranges from a few percent to 10–20%. The optimal spectral resolution is 0.5–5 Å. It is very desirable to complement spectral observations with photometric data. The results of the first set of such observations with the 6-meter telescope are reported." @default.
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- W77477951 date "1987-01-01" @default.
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- W77477951 title "1–3-Day Variations of the Broad Emission Lines of Seyfert Nuclei" @default.
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- W77477951 doi "https://doi.org/10.1017/s0074180900155172" @default.
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