The MASSIVE Survey. VI. The Spatial Distribution and Kinematics of Warm Ionized Gas in the Most Massive Local Early-type Galaxies
The MASSIVE Survey. VI. The Spatial Distribution and Kinematics of Warm Ionized Gas in the Most Massive Local Early-type Galaxies
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大规模调查。
DOI：
10.3847/1538-4357/aa5ebc
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发表时间：
2017
期刊：
影响因子：
--
通讯作者：
Jens Thomas
中科院分区：
文献类型：
--
作者：
V. Pandya;J. Greene;Chung;M. Veale;Irina Ene;T. Davis;J. Blakeslee;A. Goulding;N. McConnell;K. Nyland;Jens Thomas
我们提出了第一个系统的调查温暖的电离气体的存在，空间分布和运动学跟踪的[O二] 3727发射线在74个最大的星系在本地宇宙。我们所有的星系都有深积分场光谱，来自于对恒星质量（MK < −25.3等）和距离D < 108 Mpc的早期星系的体积和星等限制的MASSIVE巡天。在我们样本中的74个星系中，我们在28个星系中检测到温暖的电离气体，这产生了38 ± 6%的全球检测分数，下降到典型的[O ii]等效宽度限制为2 μ m。大质量快速旋转体比大质量慢速旋转体更可能含有气体，检测分数分别为80 ± 10%和28 ± 6%。其空间范围涵盖了很大的半径范围（0.6-18.2 kpc; 0.1- 4 Re），气体形态也多种多样，其中17/28 61 ± 9%集中在中心，8/28 29 ± 9%显示出清晰的旋转，达到几千秒差距，3/28 11 ± 6%延伸但不均匀。四分之三的快速旋转器显示出恒星和气体之间的运动学对准，而两个具有强大运动学测量的慢速旋转器则显示出运动学未对准。我们推测的温暖电离气体质量大约是105 M Ω。的发射线比和径向等效宽度的配置文件一般是一致的激发气体的旧的底层恒星人口。我们探索了大质量星系的不同气体起源场景，发现各种物理过程可能在起作用，包括内部气体再循环，热气晕冷却，以及通过合并获得的气体。
We present the first systematic investigation of the existence, spatial distribution, and kinematics of warm ionized gas as traced by the [O ii] 3727 Å emission line in 74 of the most massive galaxies in the local universe. All of our galaxies have deep integral-field spectroscopy from the volume- and magnitude-limited MASSIVE survey of early-type galaxies with stellar mass (MK < −25.3 mag) and distance D < 108 Mpc. Of the 74 galaxies in our sample, we detect warm ionized gas in 28, which yields a global detection fraction of 38 ± 6% down to a typical [O ii] equivalent width limit of 2 Å. MASSIVE fast rotators are more likely to have gas than MASSIVE slow rotators with detection fractions of 80 ± 10% and 28 ± 6%, respectively. The spatial extents span a wide range of radii (0.6–18.2 kpc; 0.1–4Re), and the gas morphologies are diverse, with 17/28 ≈ 61 ± 9% being centrally concentrated, 8/28 ≈ 29 ± 9% exhibiting clear rotation out to several kiloparsecs, and 3/28 ≈ 11 ± 6% being extended but patchy. Three out of four fast rotators show kinematic alignment between the stars and gas, whereas the two slow rotators with robust kinematic measurements available exhibit kinematic misalignment. Our inferred warm ionized gas masses are roughly ∼105 M⊙. The emission line ratios and radial equivalent width profiles are generally consistent with excitation of the gas by the old underlying stellar population. We explore different gas origin scenarios for MASSIVE galaxies and find that a variety of physical processes are likely at play, including internal gas recycling, cooling out of the hot gaseous halo, and gas acquired via mergers.
DOI：
10.1088/0004-637x/691/2/l142
发表时间：
2009-01
期刊：
The Astrophysical Journal
影响因子：
--
作者：
J. Kormendy;R. Bender
通讯作者：
J. Kormendy;R. Bender
大规模调查 - III。
影响因子：
4.8
作者：
Davis T
通讯作者：
Davis T