X-ray narrow emission lines from the nuclear region of NGC 1365

摘要: NGC 1365 is a Seyfert 2 galaxy with starburst ring in its nuclear region. In this work we look at the XMM Reflection Grating Spectrometer (RGS) data from four 2012-13, three 2007 and two 2004 observations of 1365. We characterise narrow-line emitting gas visible by RGS make comparisons between 2012-13 spectra those 2004-07, already published. This source usually absorbed within soft X-ray band, typical neutral column density >1.5 x 10$^{23}$ cm$^{-2}$, only 1 observation 9 investigate shows low enough absorption for continuum to emerge X-rays. stack all separately analysing less separately. first model using gaussian profiles representing narrow line emission. fit physically motivated models stacked spectra, collisionally ionised components emission photoionised AGN The collisional are fitted together on top physical model. spectrum well represented combination phases gas, higher than solar nitrogen abundances. was spectrum, yet also fits 2004-07 without changing any characteristics phases. Our results consistent previous these data, 5 additional lines detected both spectra. estimate distance line-emitting central be <300 pc.