论文标题
自适应光学磁场光谱法中HE 2-10中有大量黑洞的证据
Evidence for an accreting massive black hole in He 2-10 from adaptive optics integral field spectroscopy
论文作者
论文摘要
Henize 2-10是一个蓝矮星银河系，具有强烈的恒星形成，最有趣的问题是它是否容纳了一个积累的黑洞。我们使用内部130 PC的H和K波段整体磁场$ \ $ \ $ 130 pc的He 2-10来研究以前所未有的空间分辨率的气体的发射和运动学。使用Altair自适应光学模块运行的Gemini近红外积分光谱仪（NIFS）进行观察，并且所得的空间分辨率分别为6.5 PC和8.6 PC，在K和H频段中为8.6 PC。该线发射的大部分归因于通过光学化和恒星形成区域产生的冲击激发气体的激发。此外，我们的数据提供了通过位于无线电和X射线源位置的活跃银河系核激发气体发射的证据，如发射线比的分析所示。来自该场中离子气体的发射线呈现两个运动学成分：一个具有速度场的狭窄，表明磁盘旋转，并且由于恒星形成区域的风而导致的宽阔成分。分子气仅显示狭窄的成分。恒星速度分散图在黑洞的位置显示了约7 km s $^{ - 1} $的增强，与$ 1.5^{+1.3} _ { - 1.3} _ { - 1.3} \ times10^6 $ m $ _ _ \ odot $一致。
Henize 2-10 is a blue dwarf galaxy with intense star formation and one the most intriguing question about it is whether or not it hosts an accretingmassive black hole. We use H and K-band integral field spectra of the inner 130 pc$\times$130 pc of He 2-10 to investigate the emission and kinematics of the gas at unprecedented spatial resolution. The observations were done using the Gemini Near-Infrared Integral Field Spectrograph (NIFS) operating with the ALTAIR adaptive optics module and the resulting spatial resolutions are 6.5 pc and 8.6 pc in the K and H bands, respectively. Most of the line emission is due to excitation of the gas by photo-ionization and shocks produced by the star forming regions. In addition, our data provide evidence of emission of gas excited by an active galactic nucleus located at the position of the radio and X-ray sources, as revealed by the analysis of the emission-line ratios. The emission lines from the ionized gas in the field present two kinematic components: one narrow with a velocity field suggesting a disk rotation and a broad component due to winds from the star forming regions. The molecular gas shows only the narrow component. The stellar velocity dispersion map presents an enhancement of about 7 km s$^{-1}$ at the position of the black hole, consistent with a mass of $1.5^{+1.3}_{-1.3}\times10^6$ M$_\odot$.
