Spectrophotometry of Selected AGN Seyfert Galaxy AKN 564

Extract

Akn 564 (α₁₉₅₀ = 22^h40^m18.3^s, δ₁₉₅₀ = 29°27′47″) is a Sy1.5G SBb type galaxy. According to Zwicky (1966) it has a photographic magnitude m_p = 14.4 and a redshift of 0.025. The spectra of the galaxy were obtained at the 2.6-m telescope of the Crimean Astrophysical Observatory with a spectrograph having a dispersion of 100 A mm⁻¹. They were processed with the help of SPEC and LONG packages integrated in MIDAS. As a result of the spectrophotometry we obtain the fluxes at λλ 4363, 4959, 5007 A: I(4363), I(4959), I(5007). The spectrum of the galaxy in λλ 4000–7000 is shown in Figure 1. We use the relation of the fluxes of those narrow forbidden emission lines: sensitive at a greater extent to the electron temperature T_e than to the electron density n_e. The value of R = 74.3 we got, having a typical value of n_e = 5×10⁵ cm⁻³ for the NLR (Narrow Line Region), leads to the estimation of a typical temperature of T_e = 10⁴ K.