The complex gas kinematics in the nucleus of the Seyfert 2 galaxy NGC 1386: rotation, outflows and inflows
Davide Lena, Andrew Robinson, Thaisa Storchi-Bergmann, Allan Schnorr-Muller, Trent Seelig, Rogemar A. Riffel, Neil M. Nagar, Guilherme S. Couto, Lucas Shadler
备注：
24 pages, 16 figures, 3 tables, interesting results, accepted for publication in ApJ
我们提出的光学积分场光谱的环核气体的塞弗特2星系NGC 1386。数据覆盖中央7 $^{\prime\prime} \times 9^{\prime\prime}$（530 $\times$ 680 pc），空间分辨率为0.9”（68 pc），光谱范围为5700-7000 nm，分辨率为66 km/s $^{-1}$。谱线发射主要由明亮的中心分量控制，具有两个在核的南北方向延伸$\approx$ 3 $^{\prime\prime}$的叶。我们确定了三个主要的运动部件。第一个具有低速色散（$\bar σ\approx $ 90公里秒$^{-1}$），在整个视场中延伸，并具有与星系盘中的气体旋转一致的速度场。我们解释的瓣，由于光致电离的磁盘气体在AGN辐射锥拦截磁盘的区域。第二个具有较高的速度色散（$\bar σ\approx$ 200 km s $^{-1}$），并观察到在内部150 pc周围的连续峰。该分量是双峰的，红移和蓝移分量由$\approx$ 500 km s $^{-1}$分开。结合既往HST成像，这些特征提示存在双极流出，我们估计质量流出率为$\mathrm{\dot M} \gtrsim $ 0.1 M $_{\odot}$/年$^{-1}$。第三个组成部分是揭示了与增强的速度色散的速度残差，并建议外流和/或旋转发生近似在赤道面的环面。第二个系统的速度残差可能表明存在的流动运动沿尘埃螺旋盘。
英文摘要：
We present optical integral field spectroscopy of the circum-nuclear gas of the Seyfert 2 galaxy NGC 1386. The data cover the central 7$^{\prime\prime} \times 9^{\prime\prime}$ (530 $\times$ 680 pc) at a spatial resolution of 0.9" (68 pc), and the spectral range 5700-7000 Å at a resolution of 66 km s$^{-1}$. The line emission is dominated by a bright central component, with two lobes extending $\approx$ 3$^{\prime\prime}$ north and south of the nucleus. We identify three main kinematic components. The first has low velocity dispersion ($\bar σ\approx $ 90 km s$^{-1}$), extends over the whole field-of-view, and has a velocity field consistent with gas rotating in the galaxy disk. We interpret the lobes as resulting from photoionization of disk gas in regions where the AGN radiation cones intercept the disk. The second has higher velocity dispersion ($\bar σ\approx$ 200 km s$^{-1}$) and is observed in the inner 150 pc around the continuum peak. This component is double peaked, with redshifted and blueshifted components separated by $\approx$ 500 km s$^{-1}$. Together with previous HST imaging, these features suggest the presence of a bipolar outflow for which we estimate a mass outflow rate of $\mathrm{\dot M} \gtrsim $ 0.1 M$_{\odot}$ yr$^{-1}$. The third component is revealed by velocity residuals associated with enhanced velocity dispersion and suggests that outflow and/or rotation is occurring approximately in the equatorial plane of the torus. A second system of velocity residuals may indicate the presence of streaming motions along dusty spirals in the disk.
We present a two-dimensional mapping of stellar population age components, emission-line fluxes, gas excitation and kinematics within the inner $\sim200$ pc of the Seyfert 2 galaxy NGC 2110. We used the Gemini North Integral Field Spectrograph (NIFS) in the J and K bands at a spatial resolution of $\sim22$ pc. The unresolved nuclear continuum is originated in combined contributions of young stellar population (SP; age$\leq100$ Myr), a featureless AGN continuum and hot dust emission. The young-intermediate SP ($100<$age$\leq700$ Myr) is distributed in a ring-shaped structure at $\approx140$ pc …
We present a Cepheid-based distance to the nearby Seyfert galaxy NGC\,6814 from {\it Hubble Space Telescope} observations. We obtained F555W and F814W imaging over the course of 12 visits with logarithmic time spacing in 2013 August$-$October. We detected and made photometric measurements for 16,469 unique sources across all images in both filters, from which we identify 90 excellent Cepheid candidates spanning a range of periods of $13-84$ days. We find evidence for incompleteness in the detection of candidates at periods <21 days. Based on the analysis of Cepheid candidates above the incompl…
We report the complex radio properties of the radio galaxy NGC 2329 that resides in the centre of the galaxy cluster Abell 569. For this study, we have used archival data from the Very Large Array (VLA) at various resolutions and frequencies, as well as the Very Long Baseline Array (VLBA). While the wide-angle tailed (WAT) Fanaroff-Riley type I (FR I) radio morphology of the source has been discussed widely in the literature, the nature of the inner lobes has not been as widely discussed. In particular, we note that the inner lobes resemble the bubble-like radio structures observed in Seyfert …
We report the discovery of a secondary pair of radio lobes in the Seyfert galaxy NGC 2639 with polarization-sensitive observations with the Karl G. Jansky Very Large Array (VLA). The presence of these lobes, which are aligned nearly perpendicular to the known set of radio lobes observed in the east-west direction, has not been reported previously in the literature. The in-band rotation measure image shows gradients in both the lobes indicative of organised magnetic field structures on kpc-scales. The magnetic field structure is aligned with the jet/lobe direction in both the lobes. Based on th…
NGC 6860, Mrk 915, and MCG -01-24-012. II. Inflowing and outflowing cold molecular gas and the connection with ionized gas in Seyfert galaxies
Zentrum für Astronomie der Universität Heidelberg, Astronomisches Rechen-Institut（海德堡大学天文中心，天文计算研究所）；Departamento de Astronomia, Universidade Federal do Rio Grande do Sul（南里奥格兰德联邦大学天文学系）；Astronomy Department, Universidad de Concepción（康塞普西翁大学天文学系）；Observatorio Astronómico Nacional (OAN-IGN)-Observatorio de Madrid（国家天文台（OAN-IGN）马德里天文台）；Departamento de Física, CCNE, Universidade Federal de Santa Maria（圣玛丽亚联邦大学物理系，CCNE）；Centro de Astrobiología (CAB), CSIC-INTA（西班牙国家技术研究委员会-国家航空航天技术研究所天体生物学中心）；Finnish Centre for Astronomy with ESO, University of Turku（图尔库大学芬兰ESO天文学中心）
Changing looks of the nucleus of Seyfert galaxy NGC 3516 during 2016-2020
Sternberg Astronomical Institute, M. V. Lomonosov Moscow State University（莫斯科国立大学列别杰夫天文研究所）；Shamakhy Astrophysical Observatory, National Academy of Sciences（巴库国家科学院沙马基天体物理观测站）
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