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arXiv 0908.2028astro-ph.GAastro-ph.HE
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黑洞质量-凸起质量相关:凸起与伪凸起

The black hole mass-bulge mass correlation: bulges versus pseudo-bulges

Jian Hu

摘要:

研究了椭圆星系、经典星系球和伪星系球中超大质量黑洞质量(M_bh)与宿主星系球质量之间的标度关系。利用二维图像分析软件BUDDA对57个星系进行了动力学M bh测量,获得了星系的结构参数,并确定了核球K带光度(L bul,K)、恒星质量(Ms)和动力学质量(M d)。修正后的椭圆星系和经典星系球的M_bh-L_bul、K、M_bh-M_s和M_bh-M_d关联给出M_bh~ 0.006M_s或0.003M_d。最紧密的关系是log(M_bh/M_sun)=a+b log(M_d/10^11 M_sun),其中a=8.46+/-0.05,b =0.90+/-0.06,内禀散射为0.27 dex。这些赝球壳中的黑洞比经典球壳中的黑洞小一个数量级,即M_bh~0.0003M_s或0.0002M_d。除了M_bh-σ(bulge stellar velocity dispersion)关系外,这些与球型有关的M_bh-M_bul标度关系还为SMBH及其宿主球的生长和共同演化历史提供了信息。我们还发现,核心椭圆星系与其他正常椭圆星系一样,也服从无耗散并合情形所期望的M_bh-M_d关系。

英文摘要:

We investigate the scaling relations between the supermassive black holes mass (M_bh) and the host bulge mass in elliptical galaxies, classical bulges, and pseudo-bulges. We use two-dimensional image analysis software BUDDA to obtain the structural parameters of 57 galaxies with dynamical M_bh measurement, and determine the bulge K-band luminosities (L_bul,K), stellar masses (M_s), and dynamical masses (M_d). The updated M_bh-L_bul,K, M_bh-M_s, and M_bh-M_d correlations for elliptical galaxies and classical bulges give M_bh~0.006M_s or 0.003M_d. The most tight relationship is log(M_bh/M_sun)=a+b log(M_d/10^11 M_sun), with a=8.46+/-0.05, b=0.90+/-0.06, and intrinsic scatter 0.27 dex. The pseudo-bulges follow their own relations, they harbor an order of magnitude smaller black holes than those in the same massive classical bulges, i.e. M_bh~0.0003M_s or 0.0002M_d. Besides the M_bh-σ(bulge stellar velocity dispersion) relation, these bulge type dependent M_bh-M_bul scaling relations provide information for the growth and coevolution histories of SMBHs and their host bulges. We also find the core elliptical galaxies obey the same M_bh-M_d relation with other normal elliptical galaxies, that is expected in the dissipationless merger scenario.

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