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  • optical spectral decomposition of ngc 4051

    جزئیات بیشتر مقاله
    • تاریخ ارائه: 1392/07/24
    • تاریخ انتشار در تی پی بین: 1392/07/24
    • تعداد بازدید: 834
    • تعداد پرسش و پاسخ ها: 0
    • شماره تماس دبیرخانه رویداد: -
     considering the host galaxy contribution, a spectral decomposition method is used to reanalyzed the archive data of optical spectra for a narrow line seyfert 1 galaxy, ngc 4051. the light curves of the continuum f λ (5100 å), and hβ, he ii, fe ii emission lines are given. we find strong flux correlations between line emissions of hβ, he ii, fe ii and the continuum f λ (5100 å). these low-ionization lines (hβ, fe ii, he ii) have “inverse” intrinsic baldwin effects. using the methods of the cross-correlation function and the monte carlo simulation, we find the time delays, with respect to the continuum, are 3.45+12.0−0.5 days with the probability of 34 % for the intermediate component of hβ, 6.45+13.0−1.0 days with the probability of 65 % for the intermediate component of he ii. from these intermediate components of hβ and he ii, the calculated central black hole masses are 0.86+4.35−0.33×106 and 0.82+3.12−0.45×106 m⊙ . we also find that the time delays for fe ii are 9.7+3.0−5.0 days with the probability of 36 %, 8.45+1.0−2.0 days with the probability of 18 % for the total epochs and “subset 1” data, respectively. it seems that the fe ii emission region is outside of the hβ emission region.

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