使用完全z<0.4光谱CSC/SDSS星表在XRB和AGN吸积之间的经验联系
Empirical Links between XRB and AGN accretion using the complete z<0.4 spectroscopic CSC/SDSS Catalog
摘要：
银河系X射线双星（XRB）系统和活动星系核（AGN）的吸积特征之间有着惊人的相似之处。XRB光谱状态显示X射线光谱硬度和爱丁顿比之间的V形相关性，因为它们的变化，和一些活动星系核样品揭示了类似的趋势，这意味着类似的过程中大大更大的质量和时间尺度。为了进一步研究类比，我们将钱德拉源目录中的617个源与SDSS光谱进行了匹配，并在广泛的AGN和星系类型中均匀地测量了X射线和光学光谱特征。我们提供了有用的表格的X射线光谱斜率宽和窄线活动星系核，恒星形成和被动星系和复合系统，还更新光学（Ha和[OIII]）线发射和X射线光度之间的关系。我们进一步拟合宽带光谱能量分布与各种模板来估计热光度。我们的研究结果证实了一个显着的趋势，活动星系核之间的X射线光谱硬度和爱丁顿比表示在X射线光度，虽然有显着的分散。当用全测辐射热或模板估算的活动星系核光度表示时，这种趋势并不显著。我们还确认了X射线/光谱斜率aox和爱丁顿比之间的关系，但它可能不会遵循预测的趋势与XRB吸积状态类比。
英文摘要：
Striking similarities have been seen between accretion signatures of Galactic X-ray binary (XRB) systems and active galactic nuclei (AGN). XRB spectral states show a V-shaped correlation between X-ray spectral hardness and Eddington ratio as they vary, and some AGN samples reveal a similar trend, implying analogous processes at vastly larger masses and timescales. To further investigate the analogies, we have matched 617 sources from the Chandra Source Catalog to SDSS spectroscopy, and uniformly measured both X-ray and optical spectral characteristics across a broad range of AGN and galaxy types. We provide useful tabulations of X-ray spectral slope for broad and narrow line AGN, star-forming and passive galaxies and composite systems, also updating relationships between optical (Ha and [OIII]) line emission and X-ray luminosity. We further fit broadband spectral energy distributions with a variety of templates to estimate bolometric luminosity. Our results confirm a significant trend in AGN between X-ray spectral hardness and Eddington ratio expressed in X-ray luminosity, albeit with significant dispersion. The trend is not significant when expressed in the full bolometric or template-estimated AGN luminosity. We also confirm a relationship between the X-ray/optical spectral slope aox, and Eddington ratio, but it may not follow the trend predicted by analogy with XRB accretion states.
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