The morphology, kinematics and metallicity of blue-core galaxies

The morphology, kinematics and metallicity of blue-core galaxies
复制标题

蓝核星系的形态、运动学和金属丰度

DOI:
10.1088/1674-4527/19/6/81
复制
发表时间:
2019-06
影响因子:
1.8
通讯作者:
Yu Xiao Ling
Yu Xiao Ling
中科院分区:
物理与天体物理3区
文献类型:
--
作者:
Chen Yong Yun;Chen Yan Mei;Gu Qiu Sheng;Shi Yong;Bing Long Ji;Yu Xiao Ling

文献摘要

参考文献

相似文献

我们从MaNGA调查中选择了107个蓝核星系,研究了它们的形态、运动学以及气相金属丰度。我们的研究结果如下:(i)在我们的样本中,26%的蓝核星系具有解耦的气体恒星运动学,表明外部气体吸积;15%具有条状结构,8%具有合并后的特征,如潮汐尾和不规则的气星速度场。所有这些过程/特征,如外部错向气体的吸积、相互作用和堵塞,都可以触发气体流入。因此,中心的恒星形成活动导致其中心的颜色更蓝(蓝核星系)。(ii)通过与SDSS DR7恒星形成星系样本的比较,我们发现蓝核星系的中心气相金属丰度比局部质量-金属丰度关系预测的要高。我们探索了高金属丰度的起源,发现不仅蓝核星系,平梯度星系和红核星系都具有较高的金属丰度。这可以用红移和星系颜色的综合效应来解释。
We select 107 blue-core galaxies from the MaNGA survey, studying their morphology, kinematics as well as the gas-phase metallicity. Our results are as follows: (i) In our sample, 26% of blue-core galaxies have decoupled gas-star kinematics, indicating external gas accretion; 15% have bar-like structure and 8% show post-merger features, such as tidal tails and irregular gas/star velocity field. All these processes/features, such as accreting external misaligned gas, interaction and bar, can trigger gas inflow. Thus the central star-forming activities lead to bluer colors in their centers (blue-core galaxies). (ii) By comparing with the SDSS DR7 star-forming galaxy sample, we find that the blue-core galaxies have higher central gas-phase metallicity than what is predicted by the local mass-metallicity relation. We explore the origin of the higher metallicity, finding that not only the blue-core galaxies, but also the flat-gradient and red-core galaxies all have higher metallicity. This can be explained by the combined effect of redshift and galaxy color.
DOI: 10.1093/mnras/stw2055
发表时间: 2016-11
影响因子: 4.8
作者:
Yifei Jin;Yan-Mei Chen;Yong Shi;C. Tremonti;M. Bershady;M. Merrifield;E. Emsellem;E. Emsellem
通讯作者: Yifei Jin;Yan-Mei Chen;Yong Shi;C. Tremonti;M. Bershady;M. Merrifield;E. Emsellem;E. Emsellem
DOI: 10.1093/mnras/stv2722
发表时间: 2015-11
影响因子: 4.8
作者:
Alejandro Ben'itez-Llambay;J. Navarro;M. Abadi;S. Gottloeber;G. Yepes;Y. Hoffman;M. Steinmetz
通讯作者: Alejandro Ben'itez-Llambay;J. Navarro;M. Abadi;S. Gottloeber;G. Yepes;Y. Hoffman;M. Steinmetz
DOI: 10.1086/508913
发表时间: 2007-04-01
影响因子: 4.9
作者:
Dalcanton, Julianne J.
通讯作者: Dalcanton, Julianne J.
DOI: 10.1088/2041-8205/764/1/l1
发表时间: 2012-12
期刊: The Astrophysical Journal Letters
影响因子: --
作者:
F. Muller-S'anchez;M. Prieto;M. Mezcua;R. Davies;M. Malkan;M. I. D. A. D. Canarias-M.-I.-D.-A.-D.-Canarias-102993718;U. L. Laguna
通讯作者: F. Muller-S'anchez;M. Prieto;M. Mezcua;R. Davies;M. Malkan;M. I. D. A. D. Canarias-M.-I.-D.-A.-D.-Canarias-102993718;U. L. Laguna
DOI: 10.1088/0004-637x/798/1/7
发表时间: 2015-01-01
影响因子: 4.9
作者:
Bundy, Kevin;Bershady, Matthew A.;Zhang, Kai
通讯作者: Zhang, Kai