AINUR：NUclear环图像图集
AINUR: Atlas of Images of NUclear Rings
摘要：
我们提出了迄今为止最完整的核环图集。我们包括在107个星系中发现的113个环，其中6个是椭圆星系，5个是高度倾斜的盘星系，18个是无棒盘星系，78个是棒盘星系。恒星形成核环出现在20%的盘星系中，类型在T=-3和T=7之间。我们的目标是探索环的大小和形态与各种星系参数之间可能存在的关系。我们生产的颜色指数和结构图，以及Halpha和Paalpha连续减影图像HST档案数据。我们从H波段2 MASS图像中推导出椭圆率分布，以检测酒吧并找到它们的度量参数。我们测量的非轴对称扭矩参数，Qg，并搜索杆，环度量参数，和Qg之间的相关性。我们的核环图集包括恒星形成环和尘埃环。核环的半径从几十秒差距到几千秒差距不等。恒星形成的核环可以在广泛的形态类型中找到，从S 0到Sd，在Sab和Sb之间的分布中有一个峰值，并且没有强烈的棒星系偏好。在椭圆星系和S 0星系中发现了尘埃核环。对于棒星系，核环的最大半径是棒半径的四分之一。我们发现核环和酒吧之间的PA偏移几乎随机分布。有一些证据表明，核环的椭圆率是有限的酒吧椭圆率。我们确认，一个恒星形成的核环的最大相对大小是成反比的非轴对称扭矩参数，Qg，和核环的起源，即使是在非禁止主机，是密切相关的动力学共振的存在。
英文摘要：
We present the most complete atlas of nuclear rings to date. We include 113 rings found in 107 galaxies, six of which are elliptical galaxies, five are highly inclined disc galaxies, 18 are unbarred disc galaxies, and 78 are barred disc galaxies. Star-forming nuclear rings occur in 20% of disc galaxies with types between T=-3 and T=7. We aim to explore possible relationships between the size and morphology of the rings and various galactic parameters. We produce colour index and structure maps, as well as Halpha and Paalpha continuum-subtracted images from HST archival data. We derive ellipticity profiles from H-band 2MASS images in order to detect bars and find their metric parameters. We measure the non-axisymmetric torque parameter, Qg, and search for correlations between bar, ring metric parameters, and Qg. Our atlas of nuclear rings includes star-forming and dust rings. Nuclear rings span a range from a few tens of parsecs to a few kiloparsecs in radius. Star-forming nuclear rings can be found in a wide range of morphological types, from S0 to Sd, with a peak in the distribution between Sab and Sb, and without strong preference for barred galaxies. Dust nuclear rings are found in elliptical and S0 galaxies. For barred galaxies, the maximum radius that a nuclear ring can reach is a quarter of the bar radius. We found a nearly random distribution of PA offsets between nuclear rings and bars. There is some evidence that nuclear ring ellipticity is limited by bar ellipticity. We confirm that the maximum relative size of a star-forming nuclear ring is inversely proportional to the non-axisymmetric torque parameter, Qg, and that the origin of nuclear rings, even the ones in non-barred hosts, are closely linked to the existence of dynamical resonances.
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