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Variability of emission line spectrum and physical conditions in the nucleus of the seyfert galaxy NGC 1275
Author(s) -
Pronik I.
Publication year - 1976
Publication title -
astronomische nachrichten
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.394
H-Index - 63
eISSN - 1521-3994
pISSN - 0004-6337
DOI - 10.1002/asna.19762970609
Subject(s) - physics , galaxy , astrophysics , nucleus , line (geometry) , emission spectrum , astronomy , radio galaxy , spectral line , geometry , mathematics , biology , microbiology and biotechnology
The observational evidences on the variability of relative intensities of emission lines of the Seyfert galaxy NGC 1275 are discussed. The time scale of these variations is about half a year. It equals to the time scale of continuous and radio variations of the nucleus of that galaxy. The changes of the electron temperature T e and the electron density n e calculated from the emission line intensities were found to have a functional connection. This evidences that the physical conditions in the gaseous zone of the nucleus of NGC 1275 are recurrent.