论文标题
QSO E1821+643的扩展发射线区域的运动学和电离结构
The Kinematics and Ionization Structure of the Extended Emission Line Region of QSO E1821+643
论文作者
论文摘要
最具发光的类星体是由主要的，富含气体的合并和E1821+643（一种位于冷核群集中心的光学发光的类星体，似乎处于合并后井喷阶段的后期。该类星体也被确定为引力后坐力候选者，其中超级质量黑洞（SMBH）由于在祖细胞SMBH二元的凝聚过程中引力波的各向异性发射而获得了后坐力。我们分析了E1821+643周围的扩展，电离气体的长缝光谱，以研究其运动学和电离。我们已经确定了三个运动学上不同的成分，我们分别将它们与来自原子核的广角极风，运动型不受干扰的气体和气体的红移弧状结构，在3-4 \ arcsec〜（13-18 kpc）的距离上。后一个成分与HST图像中[OIII]发射的弧的北端和东端相吻合。此特征可以追踪潮汐尾巴，该尾巴源自与富含气体的星系的合并到核的东南部，其存在是由Aravena等人推断的。从检测CO排放。另外，弧线可能是强大的类星风扫除气体壳的残余。扩展气体的发射线比与类星体的光电离是一致，但不能排除辐射冲击的贡献。
The most luminous quasars are created by major, gas-rich mergers and E1821+643, an optically luminous quasar situated at the center of a cool-core cluster, appears to be in the late stages of the post-merger blowout phase. This quasar is also identified as a gravitational recoil candidate, in which the supermassive black hole (SMBH) has received a recoil kick due to anisotropic emission of gravitational waves during the coalescence of a progenitor SMBH binary. We analyze long-slit spectra of the extended, ionized gas surrounding E1821+643 to study its kinematics and ionization. We have identified three kinematically distinct components, which we associate, respectively, with a wide-angle polar wind from the nucleus, kinematically undisturbed gas, and a redshifted arc-like structure of gas, at a distance of 3-4\arcsec~(13-18 kpc) from the nucleus. The latter component coincides with the northern and eastern extremities of an arc of [OIII] emission seen in HST images. This feature could trace a tidal tail originating from a merger with a gas-rich galaxy to the South-East of the nucleus, whose presence has been inferred by Aravena et al. from the detection of CO emission. Alternatively, the arc could be the remnant of a shell of gas swept-up by a powerful quasar wind. The emission line ratios of the extended gas are consistent with photoionization by the quasar, but a contribution from radiative shocks cannot be excluded.
