Intrinsic Morphology of Ultra-diffuse Galaxies,The Astrophysical Journal

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Intrinsic Morphology of Ultra-diffuse Galaxies
The Astrophysical Journal ( IF 4.9 ) Pub Date : 2020-08-14 , DOI: 10.3847/1538-4357/aba74a
Yu Rong ₁ , Xiao-Yu Dong ₂ , Thomas H. Puzia ₁ , Gaspar Galaz ₁ , Ruben Snchez-Janssen ₃ , Tianwen Cao _{1,

4,

5,

6} , Remco F. J. van der Burg ₇ , Cristbal Sifn _{8,

9} , Pavel E. Mancera Pia _{10,

11} , Mora Marcelo ₁ , Giuseppe D’Ago ₁ , Hong-Xin Zhang _{12,

13} , Evelyn J. Johnston ₁ , Paul Eigenthaler _{1,

14,

15}

Affiliation

Institute of Astrophysics, Pontificia Universidad Catlica de Chile, Av. Vicua Mackenna 4860, 7820436 Macul, Santiago, Chile
Department of Physics and Astronomy, California State University, Northridge, CA 91330, USA
STFC UK Astronomy Technology Centre, Royal Observatory, Blackford Hill, Edinburgh, EH9 3HJ, UK
Chinese Academy of Sciences South America Center for Astronomy, National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012, People’s Republic of China
Key Laboratory of Optical Astronomy, National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100101, People’s Republic of China
School of Astronomy and Space Science, University of Chinese Academy of Sciences, Beijing 100049, People’s Republic of China
European Southern Observatory, Karl-Schwarzschild-Str. 2, D-85748, Garching, Germany
Instituto de Fsica, Pontificia Universidad Catlica de Valparaso, Casilla 4059, Valparaso, Chile
Department of Astrophysical Sciences, Peyton Hall, Princeton University, Princeton, NJ 08544, USA
Kapteyn Astronomical Institute, University of Groningen, Lanleven 12, 9747 AD, Groningen, The Netherlands
ASTRON, the Netherlands Institute for Radio Astronomy, Postbus 2, 7990 AA, Dwingeloo, The Netherlands
CAS Key Laboratory for Research in Galaxies and Cosmology, Department of Astronomy, University of Science and Technology of China, People’s Republic of China
School of Astronomy and Space Sciences, University of Science and Technology of China, Hefei 230026, People’s Republic of China
Astro-Engineering Center of the Catholic University (AIUC), Av. Vicua Mackenna 4860, 7,820,436 Macul, Santiago, Chile
Max-Planck-Institut fr Astronomie, Knigstuhl 17, D-69117 Heidelberg, Germany

With the published data of apparent axis ratios for 1109 ultra-diffuse galaxies (UDGs) located in 17 low-redshift (z similar to 0.020-0.063) galaxy clusters and 84 UDGs in two intermediate-redshift (z similar to 0.308-0.348) clusters, we take advantage of a Markov Chain Monte Carlo approach and assume a triaxial model to investigate the intrinsic morphologies of UDGs. In contrast to the conclusion of Burkert, i.e., the underlying shapes of UDGs are purely prolate (C = B

中文翻译：

超扩散星系的内在形态学

根据已发表的位于 17 个低红移（z 类似于 0.020-0.063）星系团中的 1109 个超扩散星系（UDG）和两个中红移（z 类似于 0.308-0.348）星系团中的 84 个 UDG 的视轴比数据，我们利用马尔可夫链蒙特卡罗方法并假设一个三轴模型来研究 UDG 的内在形态。与 Burkert 的结论相反，即 UDGs 的基本形状是纯粹长长的（C = B

更新日期：2020-08-14

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