AI 中文总结
本研究结合VLT与HST观测，用施瓦西轨道叠加模型测得NGC 5102中心黑洞质量，结果与琼斯各向异性建模及M•-σe关系外推一致，验证了相关建模框架的可靠性。
AI 中文摘要
我们对透镜状星系NGC 5102（SA0⁻）中心黑洞进行恒星动力学质量测量，分析结合甚大望远镜多单元光谱探测器的高质量积分场光谱，以及哈勃空间望远镜成像光谱仪的高空间、高光谱分辨率观测，采用Ca II三重线作为恒星运动学示踪物。我们利用轴对称、三积分施瓦西轨道叠加模型约束黑洞质量，模型纳入哈勃空间望远镜F547M WFPC2成像的表面亮度测量结果。假设距离为3.66 Mpc，测得黑洞质量为(1.30⁺⁰·¹⁹₋₀·₁₈)×10⁶ M☉，该结果与此前基于CO带头的琼斯各向异性建模结果（M•=(9.1⁺¹·⁸₋₁·₅)×10⁵ M☉）的偏差在1.7σ范围内，也符合文献中M•-σe关系向当前样本不足的低质量区的外推结果。这些独立动力学方法的高度一致，为琼斯各向异性建模框架提供了外部验证，也支持了我们施瓦西轨道叠加结果的可靠性，增强了对未来用该框架测量黑洞质量的信心。
英文摘要
We present a stellar-dynamical mass measurement of the central black hole in the lenticular galaxy NGC~5102 (SA0$^-$). Our analysis combines high-quality integral-field spectroscopy from the VLT Multi Unit Spectroscopic Explorer with high-spatial- and high-spectral-resolution Hubble Space Telescope Imaging Spectrograph observations, using the Ca II triplet as a stellar kinematic tracer. We constrain the black hole mass with axisymmetric, three-integral Schwarzschild orbit-superposition models, incorporating surface brightness measurements from HST F547M WFPC2 imaging. Assuming a distance of $3.66\,\mathrm{Mpc}$, we find a black hole mass of $(1.30^{+0.19}_{-0.18})\times10^6\,\mathrm{M_{\scriptscriptstyle\odot}}$, which is within $1.7σ$ of a previous CO band-head-based Jeans Anisotropic Modeling result ($M_{\bullet}=(9.1^{+1.8}_{-1.5})\times10^5\,\mathrm{M_{\scriptscriptstyle\odot}}$). Our measurement is also consistent with literature extrapolations of the $M_{\bullet}$-$σ_e$ relation into the currently under-sampled low-mass regime. The close agreement between these independent dynamical approaches provides external validation of the Jeans Anisotropic Modeling framework and supports the robustness of our Schwarzschild orbit-superposition result, bolstering confidence in future black hole mass measurements with this framework.
Comments23 pages, 9 figures, accepted for publication in ApJ
