期刊
ASTRONOMY LETTERS-A JOURNAL OF ASTRONOMY AND SPACE ASTROPHYSICS
卷 33, 期 7, 页码 429-436出版社
PLEIADES PUBLISHING INC
DOI: 10.1134/S1063773707070018
关键词
galactic nuclei; black holes
We analyze the spectroscopic and photometric observations of the active galactic nucleus (AGN) 1E 0754.6+3928 performed at Crimean Astrophysical Observatory in 1998-2004. Based on formal spectroscopic criteria for the optical wavelength range, we can classify this object as a narrow-line Seyfert 1 (NLS1) galaxy. Over the period of its observations, the AGN 1E 0754.6+3928 showed a very low rms flux variability amplitude in both continuum and H beta (similar to 3%). The H beta time lag relative to the continuum has been found from the cross-correlation function centroid to be tau (cent) = 112(-67)(+215) days. This result and the H beta line dispersion estimate have allowed us to determine the central black hole mass by the reverberation method: 1.05 x 10(8) M-circle dot. The position of 1E 0754.6+3928 in the black hole mass-luminosity diagram agrees with the positions of other NLS1 galaxies and can be explained by an enhanced mass accretion rate in the central source.
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