J/AZh/71/200ivo://CDS.VizieR/J/AZh/71/200CDSDoroshenko V.T.Sergeev S. G.Chuvaev K. K.1997-12-09T19:43:12Z1997-12-09T20:43:08ZCDS support team

CDS, Observatoire de Strasbourg, 11 rue de l'Universite, F-67000 Strasbourg, France

cds-question@unistra.frgalaxiesspectroscopynarrow-band-photometryatomic-spectroscopyThis investigation is mainly related to hydrogen lines in the spectrum of NGC 7469 from the 1972-1990 data obtained using an image tube on the 2.6-m telescope of the Crimean Astrophysical Observatory. The decomposition of the hydrogen lines into broad and narrow components was performed. Variations in the intensities and broad-component contours were observed. One third of the spectrograms showed a broad, symmetric Ha line, while the others showed asymmetry: the blue wings fall more steeply than the red ones. The degree of asymmetry is variable, but no correlation between it and the brightness of the nucleus was found. This asymmetry becomes weaker when passing to higher members of the Balmer series. The halfwidths of the broad components increase from Ha to H{gamma}. Redshifts of broad components with respect to narrow ones might also be larger for higher members of the Balmer series. Intensities of the broad hydrogen lines follow continuum variations with a delay of about 28 days. The Balmer decrement for broad lines is much flatter than for narrow ones.1994AZh....71..200Dhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/AZh/71/200CatalogResearchIsServedByTAP VizieR generic servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AZh/71/200https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AZh/71/200http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AZh/71/200https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/AZh/71/200https://vizier.iucaa.in/viz-bin/votable?-source=J/AZh/71/200http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/AZh/71/200GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapOpticaldefaultJ/AZh/71/200/tableEquivalent widths of the emission lines in NGC 7469recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintDateObservation datetime.epochH(alpha)b?Equivalent width of H(alpha) broad line0.1nmspect.line.eqWidthfloatH(alpha)n?Equivalent width of H(alpha) narrow line0.1nmspect.line.eqWidthfloat[NII]6548?Equivalent width of [NII] 6548 A0.1nmspect.line.eqWidthfloat[NII]6583?Equivalent width of [NII] 6583 A0.1nmspect.line.eqWidthfloatH(beta)b?Equivalent width of H(beta) broad line0.1nmspect.line.eqWidthfloatH(beta)n?Equivalent width of H(beta) narrow line0.1nmspect.line.eqWidthfloat[OIII]4959?Equivalent width of [OIII] 4959 A0.1nmspect.line.eqWidthfloat[OIII]5007?Equivalent width of [OIII] 5007 A0.1nmspect.line.eqWidthfloatH(gamma)b?Equivalent width of H(gamma) broad line0.1nmspect.line.eqWidthfloatH(gamma)n?Equivalent width of H(gamma) narrow line0.1nmspect.line.eqWidthfloat