/ 98 10 11 4 v 1 7 O ct 1 99 8 Profile variations in AGN spectra
نویسنده
چکیده
We present results of optical long-term variability campaigns (10 – 20 years) of the two Seyfert galaxies NGC 7603 and Mrk 110. The variations of the continuum, of the individual broad line intensities and of their line profiles are investigated in detail and compared to line profile variations in NGC 5548 and NGC 4593. Individual emission line profiles vary differently from line to line and from outburst to outburst indicating a complex and structured broad emission line region.
منابع مشابه
/ 98 10 11 3 v 2 2 7 O ct 1 99 8 Exclusion Statistics in Conformal Field Theory – generalized fermions and spinons for level - 1 WZW theories –
We systematically study the exclusion statistics for quasi-particles for Conformal Field Theory spectra by employing a method based on recursion relations for truncated spectra. Our examples include generalized fermions in cCFT < 1 unitary minimal models, Zk parafermions, and spinons for the su(n)1, so(n)1 and sp(2n)1 Wess-Zumino-Witten models. For some of the latter examples we present explici...
متن کاملX iv : h ep - t h / 98 10 11 3 v 1 1 5 O ct 1 99 8 Exclusion Statistics in Conformal Field Theory – generalized fermions and spinons for level - 1 WZW theories –
We systematically study the exclusion statistics for quasi-particles for Conformal Field Theory spectra by employing a method based on recursion relations for truncated spectra. Our examples include generalized fermions in cCFT < 1 unitary minimal models, Zk parafermions, and spinons for the su(n)1, so(n)1 and sp(2n)1 Wess-Zumino-Witten models. For some of the latter examples we present explici...
متن کاملar X iv : a st ro - p h / 98 10 42 8 v 1 2 7 O ct 1 99 8 Preliminary Analysis of STIS - HST Spectra of Compact Ejecta from Eta
We describe some preliminary results from spatially-resolved spectroscopy of the compact ejection knots B and D in the η Carinae wind. We emphasize various line diagnostics of the abundances, kinematics and physical conditions. The data are from new STIS-HST observations described by Gull et al. elsewhere in this volume.
متن کامل98 08 18 3 v 1 1 8 A ug 1 99 8 SIGNATURES OF RESONANT ABSORPTION IN X - RAY SPECTRA OF TYPE 1 AGN
We present photoionization models accounting for both photoelectric and resonant absorption. We demonstrate that resonance absorption lines are detectable even in moderate resolution X-ray spectra of type 1 AGN. The spectra transmitted by gas illuminated by the ionizing continua typical of flat X-ray spectrum, broad optical emission line type 1 AGN, and steep X-ray spectrum, narrow optical emis...
متن کاملar X iv : h ep - p h / 98 10 52 7 v 1 2 9 O ct 1 99 8 HIGHER - TWIST CONTRIBUTIONS IN EXCLUSIVE PROCESSES
Using the renormalon technique, we estimate higher-twist contributions in deeply virtual Compton scattering and in hard exclusive π 0 leptoproduction.
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تاریخ انتشار 1998