利用OⅥ与SiⅣ+OⅣ]发射线计算类星体黑洞质量

Using OⅥ and SiⅣ+OⅣ] emission lines to measure the black hole mass for quasars

为了详尽地揭示发射线的结构特征,基于含有85个类星体的样本,利用由空间和地面望远镜准同时观测获得的高质量光谱,通过"SPECFIT"程序拟合高电离远紫外发射线OⅥλ1033.82和SiⅣ+OⅣ]λλ1396.75,1402.34,实现对谱线的详细测量.结合拟合结果和相关数据,给出基于OⅥ和SiⅣ+OⅣ]发射线的对类星体中心黑洞质量的计算公式,并将所得结果与他人研究结果进行比较,结果表明由OⅥ线所得黑洞质量的弥散小于由SiⅣ+OⅣ]线所得黑洞质量的弥散,说明利用OⅥ发射线计算黑洞质量结果较好,证明在估算高红移类星体的黑洞质量时,利用OⅥ线比SiⅣ+OⅣ]线更可行且合适.

In order to show out the structure characteristics exhaustively, spectral lines were detailed measured using the ground-based and space telescope simultaneously to obtain high-quality spectra by ＂SPECFIT＂ fitting the high-ionization ultraviolet OⅥ033.82 and Siiv＋OⅣ]AA1 396.75, 1 402.34 emission lines based on the sample of 85 optically bright quasars. Combining the fitting results and relevant data, the black hole mass formula based on O VI and Siiv ＋OⅣ]emission lines was presented, the results was put into comparison with others＇. The results show that the diffusion of the black hole mass acquired from OⅥ emission line is less than that from SiⅣ＋OⅣ] emission line, which means that using OⅥ emission line to calculate the black hole mass comes out better, showing that using OWI emission line to estimate the high-z quasar black hole masses is more feasible and suitable than using SilV＋OIV]feasible line.