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Spectral Investigation of NGC 7469 (Doroshenko+, 1994)статья
- Авторы: Doroshenko V.T., Sergeev S.G., Chuvaev K.K.
- Журнал: VizieR Online Data Catalog
- Том: 807
- Год издания: 1996
- Первая страница: 10200
- Аннотация: This 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 Hγ. 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. (1 data file).
- Добавил в систему: Дорошенко Валентина Трофимовна