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arXiv 0801.1548astro-ph
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超大质量黑洞的基本面和“无棒”M-σ关系

Fundamental Planes, and the "barless" M-sigma relation, for supermassive black holes

Alister W. Graham

摘要:

关于标准M-西格玛关系的残差与主球的有效半径、绝对星等和Sersic指数相关--尽管在这里需要注意的是,椭圆星系并不参与这种相关。此外,它揭示了棒星系(相对较小,微弱,低恒星浓度凸起)可以偏离M-西格玛关系的delta(log M)= -0.5到-1.0 dex(在这个意义上,他们的西格玛值太大了),并产生大部分上述相关性。从Tremaine等人的31个星系集合中删除7个棒星系,结果是一个“无棒M σ”关系,其内禀散射为0.17 dex(参见图1)。0.27 dex的31个星系)和0.25 dex的总散射(参见。0.34 31个星系的dex)。第三参数的引入并没有减少无杆M-西格玛关系的分散性。此外,从一个扩大和更新的40个具有可靠黑洞质量测量的星系中去除棒星系或所有盘星系,得到了一致的结果,即log(M_bh/M_sun)=(8.25+/-0.05)+(3.68+/-0.25)log [sigma/200]。用黑洞质量测量的星系的“无杆”σ-L关系与早型星系的SDSS样品一致。此外,无杆M-σ关系、M-L关系和M-n关系都表明SMBH的质量小于2-4 × 10^9 M_sun。

英文摘要:

The residuals about the standard M-sigma relation correlate with the effective radius, absolute magnitude, and Sersic index of the host bulge - although, it is noted here that the elliptical galaxies do not partake in such correlations. Moreover, it is revealed that barred galaxies (with their relatively small, faint, and low stellar concentration bulges) can deviate from the M-sigma relation by delta(log M) = -0.5 to -1.0 dex (in the sense that their sigma values are too large) and generate much of the aforementioned correlations. Removal of the seven barred galaxies from the Tremaine et al. set of 31 galaxies results in a ``barless M-sigma'' relation with an intrinsic scatter of 0.17 dex (cf. 0.27 dex for the 31 galaxies) and a total scatter of 0.25 dex (cf. 0.34 dex for the 31 galaxies). The introduction of third parameters does not reduce the scatter of the barless M-sigma relation. Furthermore, removal of the barred galaxies, or all the disk galaxies, from an expanded and updated set of 40 galaxies with reliable black hole mass measurements gives a consistent result, such that log(M_bh/M_sun) = (8.25+/-0.05) + (3.68+/-0.25)log [sigma/200]. The "barless" sigma-L relation for galaxies with black hole mass measurements is found to be consistent with that from the SDSS sample of early-type galaxies. In addition, the barless M-sigma relation, the M-L relation, and the M-n relation are all shown to yield SMBH masses less than 2-4 x 10^9 M_sun.

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