ABSTRACT

We consider the emission of resonance line radiation from rotating circular accretion disc with the progressive increasing height (the inclined ring). Our theory can also be applied to the rotating spot-like sources of resonance radiation. We assume that the atmosphere of inclined ring is homogeneous. In this case, the every part of ring emits the radiation with the wave electric field oscillations perpendicular to plane $(\boldsymbol{nN^{\prime }})$, where ${\boldsymbol{n}}$ is the direction to a telescope and $\boldsymbol{N^{\prime }}$ is the normal to considered local surface of a ring. Geometrical consideration shows that the radiation polarization angle χ (frequently denoted as position angle or PA) depends on the inclination angle α of the ring relative to the central plane of accretion disc, the inclination angle θ of the central plane of accretion disc with the normal $\boldsymbol{N}$, and on azimuthal angle φ of radiating part on the ring. The right and left parts of a ring according to the symmetry plane $(\boldsymbol{nN})$ give rise to opposite polarization angles. For rotating accretion disc, due to Doppler’s effect, this means that polarization angles have opposite signs in the red and blue wings of emerging spectral line radiation. Such behaviour is observed in many objects.

中文翻译：

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光谱线的红色和蓝色翅膀中相对位置角的新解释

摘要

我们考虑随着旋转的吸积圆盘高度（倾斜环）的增加，共振线辐射的发射。我们的理论也可以应用于旋转的点状共振辐射源。我们假设倾斜环的气氛是均匀的。在这种情况下，环的每个部分均以垂直于平面$（\ boldsymbol {nN ^ {\ prime}}）$的波电场振荡发射辐射，其中$ {\ boldsymbol {n}} $是指向望远镜和$ \ boldsymbol {N ^ {\ prime}} $是圆环局部表面的法线。几何考虑表明，辐射偏振角χ（通常表示为位置角或PA）取决于环相对于吸积盘中心平面的倾斜角α，吸积盘中心平面与法线\ boldsymbol {N} $的倾斜角θ，以及环上辐射部分的方位角φ。根据对称平面$（\ boldsymbol {nN}）$的环的左右部分会产生相反的极化角。对于旋转吸积盘，由于多普勒效应，这意味着在出现的谱线辐射的红色和蓝色翼中偏振角具有相反的符号。在许多对象中都观察到这种行为。这意味着在出现的光谱线辐射的红色和蓝色翅膀中，偏振角具有相反的符号。在许多对象中都观察到这种行为。这意味着在出现的光谱线辐射的红色和蓝色翅膀中，偏振角具有相反的符号。在许多对象中都观察到这种行为。