Kinematic signatures of nuclear discs and bar-driven secular evolution in nearby galaxies of the MUSE TIMER project
Dimitri A. Gadotti, Adrian Bittner, Jesus Falcon-Barroso, Jairo Mendez-Abreu, Taehyun Kim, Francesca Fragkoudi, Adriana de Lorenzo-Caceres, Ryan Leaman, Justus … 展开作者
Dimitri A. Gadotti, Adrian Bittner, Jesus Falcon-Barroso, Jairo Mendez-Abreu, Taehyun Kim, Francesca Fragkoudi, Adriana de Lorenzo-Caceres, Ryan Leaman, Justus Neumann, Miguel Querejeta, Patricia Sanchez-Blazquez, Marie Martig, Ignacio Martin-Navarro, Isabel Perez, Marja K. Seidel, Glenn van de Ven
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Accepted for publication in A&A; 24 pages, 9 figures, 3 tables, including 2 appendices. A full resolution PDF is available at http://www.sc.eso.org/~dgadotti/kinematics.pdf and FITS files with the derived (spatially-resolved) stellar kinematics (v, sigma, h3 and h4) for all TIMER galaxies are available at https://www.muse-timer.org/data
The central regions of disc galaxies hold clues to the processes that dominate their formation and evolution. The TIMER project has obtained high signal-to-noise and spatial resolution integral-field spectroscopy data of the inner few kpc of 21 nearby massive barred galaxies, allowing studies of the stellar kinematics with unprecedented spatial resolution. We confirm theoretical predictions of the effects of bars on stellar kinematics, and identify box/peanuts through kinematic signatures in mildly and moderately inclined galaxies, finding a lower limit to the fraction of massive barred galaxies with box/peanuts at ~62%. Further, we provide kinematic evidence of the connection between barlenses, box/peanuts and bars. We establish the presence of nuclear discs in 19 galaxies and show that their kinematics are characterised by near-circular orbits with low pressure support, and are consistent with the bar-driven secular evolution picture for their formation. In fact, we show that these nuclear discs have, in the region where they dominate, larger rotational support than the underlying main galaxy disc. We define a kinematic radius for the nuclear discs and show that it relates to bar radius, ellipticity and strength, and bar-to-total ratio. Comparing our results with photometric studies, we find that state-of-the-art galaxy image decompositions are able to discern nuclear discs from classical bulges, if the images employed have enough physical spatial resolution. In fact, we show that nuclear discs are typically identified in such image decompositions as photometric bulges with (near-)exponential profiles. However, we find that the presence of composite bulges (galaxies hosting both a classical bulge and a nuclear disc) can often be unnoticed in studies based on photometry alone, and suggest a more stringent threshold to the Sersic index to identify galaxies with pure classical bulges.
Bar ages derived for the first time in nearby galaxies: Insights on secular evolution from the TIMER sample
European Southern Observatory（欧洲南方天文台）；Durham University（杜伦大学）；Universidade de São Paulo（圣保罗大学）；Universidad de La Laguna（拉帕鲁纳大学）；Instituto de Astrofísica de Canarias（加那利天体物理研究所）；Universidad Complutense de Madrid（马德里康普顿斯大学）；Kyungpook National University（庆北国立大学）；Max Planck Institute for Astronomy（马克斯·普朗克天体物理研究所）；University of Vienna（维也纳大学）
Stellar feedback in M83 as observed with MUSE -- I. Overview, an unprecedented view of the stellar and gas kinematics and evidence of outflowing gas
我们提出了一个大的VLT/MUSE马赛克（3.8 × 3.8千秒差距）附近的旋涡星系M83，空间分辨率约20秒差距。我们得到了恒星和电离气体的运动学，并与ALMA CO（2-1）的分子气体运动学进行了比较。我们将电离气体分为HII区和扩散电离气体（DIG），并确定了来自DIG的Ha光度分数（f_DIG）。我们观察到，恒星和气体跟踪银河系盘旋转，以及快速旋转的核组件，可能连接到长期的过程驱动的银河酒吧。在气体运动学中，我们观察到原子核以东的气流，相对于圆盘发生了红移。该流被一个扩展的电离气体区域所包围，该电离气体区域具有增强的速度分散和高电离状态，这在很大程度上与被慢冲击电离一致。我们解释这一功能的叠加盘和平面外层的DIG，或作为一个酒吧驱动的冲击气体流入。一个双高斯分量拟合的Ha线也揭示了存在一个核的双锥结构，其对称轴是垂直于酒吧。这两个锥沿着视线出现蓝移和红移，并突出具有Ha发射，其与盘的分离高达200 km s-1，以及高速色散~80-200 km s-1。在锥体的远端，我们观察到气体与被冲击电离一致。这些特征以前从未在M83中观察到过;我们假设它们是在追踪一个恒星暴驱动的外流，冲击周围的ISM。最后，我们在我们的视野中获得f_DIG ~ 13%。我们检查发射的HII地区和DIG的“BPT”图，发现在HII地区的光电离占99.8%的哈通量，而DIG有混合贡献的光电离（94.9%…
Kinematics of the lens host S0 galaxy NGC 1553: role of secular processes
Indian Institute of Astrophysics（印度天体物理研究所）；Pondicherry University（本地治里大学）；Observatoire de Paris, LUX, College de France, CNRS, PSL University, Sorbonne University（巴黎天文台、LUX、法兰西学院、CNRS、PSL大学、索邦大学）
本文利用 MUSE 高分辨率积分场光谱和 HST 图像研究 S0 星系 NGC 1553 中心“盘-透镜”结构的运动学特征，揭示核盘、经典核球、核棒及旋涡结构，并结合恒星年龄与金属丰度证据，提出该结构形成于星系演化早期并受内部长期过程和外部环境共同塑造。
Connecting galaxies with their haloes -- from parsec to Mpc scales
University of Vienna（维也纳大学）；University of New South Wales（新南威尔士大学）；Indian Institute of Astrophysics（印度天体物理研究所）；Instituto de Astrofı́sica de Canarias（加那利天体物理学研究所）；Universidad de La Laguna（拉古纳大学）；Centre for Astrophysics and Supercomputing, Swinburne University（斯威本大学天体物理学与超级计算中心）；European Southern Observatory（欧洲南方天文台）；University of Queensland（昆士兰大学）；University of Turku（图尔库大学）；Leiden Observatory（莱顿天文台）；Delft University（代尔夫特理工大学）；Heidelberg University（海德堡大学）
Disc growth and vertical heating of lenticular galaxies in the Fornax cluster
Liverpool John Moores University（利物浦约翰摩尔斯大学）；Instituto de Astrofísica de Canarias（加那利天体物理研究所）；Universidad de La Laguna（拉帕鲁纳大学）；Leibniz-Institut für Astrophysik Potsdam (AIP)（波茨坦莱布尼茨天体物理研究所）
The assembly of bulge-dominated galaxies: two evolutionary channels traced through morphology, kinematics, and environment with a hybrid classification pipeline
Universidade Cidade de São Paulo（圣保罗城市大学）；Universidade de São Paulo, IAG（圣保罗大学天体物理研究所）；California Institute of Technology（加州理工学院）；Instituto de Astrofísica de Canarias（加那利群岛天体物理研究所）；Universidad Técnica Federico Santa María（费德里科·Santa玛利亚技术大学）
The GECKOS survey: Assembly history of the lenticular galaxy NGC 3957
Liverpool John Moores University（利物浦约翰摩尔斯大学）；Shanghai Astronomical Observatory, Chinese Academy of Sciences（中国科学院上海天文台）；European Southern Observatory（欧洲南方天文台）；University of Vienna（维也纳大学）；University of New South Wales（新南威尔士大学）；Instituto de Astrofísica de Canarias（加那利群岛天体物理研究所）；Universidad de La Laguna（拉古纳大学）；Univ Lyon, Univ Lyon1, ENS de Lyon, CNRS, Centre de Recherche Astrophysique de Lyon UMR5574（里昂大学、里昂第一大学、里昂高等师范学院、法国国家科学研究中心、里昂天体物理研究中心）；University of Durham（杜伦大学）
