AGN天体物理学：比较射电和盖亚光学天体测量学
AGN astrophysics from comparing radio and Gaia optical astrometry
摘要：
盖亚将开辟一个巨大的新的参数空间，在其中探索活动星系核和黑洞演化的物理学。我们解决的问题，有多远沿相对论喷流耀变体无线电，光学和伽马射线发射起源。在某些模型中，光学质心漂移应该是可检测的，因为热和非热光学发射的相对贡献改变。为活动星系核提供能量的黑洞并不一定位于其宿主星系的中心;它们可能是双星对中的一员，也可能是在双星合并后受到了反冲。对于射电强活动星系核，天体射电和光学位置的比较可以揭示这种位移。这表明，这将是可行的，这样做使用盖亚和e-MERLIN的样本数以千计的椭圆射电星系。
英文摘要：
Gaia will open up a huge volume of new parameter space in which to explore the physics of AGN and black hole evolution. We address the question as to how far along the relativistic jets blazar radio, optical and gamma ray emission originated. In some models the optical centroid wander should be detectable as the relative contributions of thermal and non-thermal optical emission change. Black holes powering AGN do not necessarily reside at the centres of their host galaxies; they can be one member of a binary pair or they could have received a kick after binary coalescence. For radio-loud AGN comparison of astrometric radio and and optical positions can reveal such displacements. It is suggested that it would be feasible to do this using Gaia and e-MERLIN for a sample of thousands of elliptical radio galaxies.
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