The relation between the Black hole mass and the Bulge mass for low redshift AGNs. Part I: Ground-based observations

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• 作者：L.H. Chao ; W.H. Bian ; K.L. Huang
• 关键词：Galaxies ; active ; bulges ; nuclei ; quasars ; seyfert
• 刊名：Advances in Space Research
• 出版年：2008
• 期刊代码：6_02731177
• 类别：et
• 出版时间：5 August 2008
• 卷：42
• 期：3
• 页码：544-549
• 文件大小：304 K

摘要

Using the bulge data from AGN image decomposition with ground-based observations, we calculate the ratios of the central supermassive black hole mass(SMBH) to the Bulge mass (M_bh/M_bulge) in a sample of X-ray selected AGNs, including 15 Narrow-line Seyfert 1 galaxies (NLS1s) and 18 broad-line Seyfert 1 galaxies (BLS1s). We found that the mean value of 252eba50218" title="Click to view the MathML source" alt="Click to view the MathML source">log(M_bh/M_bulge) is -3.81±0.11 for 15 NLS1s, and -2.91±0.13 for 18 BLS1s, showing the lower M_bh/M_bulge in NLS1s relative to BLS1s. The calculation shows that the Bulge mass from the host image decomposition in NLS1s is statistically smaller than that from Hubble-type correction method, and a linear mass relation is suggested for NLS1s and a nonlinear mass relation for BLS1s. The studying of host galaxies with ground-based observations strongly limited by the atmospheric seeing. We need to do the decomposition of host images for NLS1s with Hubble Space Telescope observation in the future.