Zobrazeno 1 - 10
of 5 767
pro vyhledávání: '"Mo, H."'
Autor:
Wang, Tao, Sun, Hanwen, Zhou, Luwenjia, Xu, Ke, Cheng, Cheng, Li, Zhaozhou, Chen, Yangyao, Mo, H. J., Dekel, Avishai, Zheng, Xianzhong, Cai, Zheng, Yang, Tiacheng, Dai, Y. -S., Elbaz, David, Huang, J. -S.
One of the main challenges in galaxy formation that has emerged recently is the early assembly of massive galaxies. The observed number density and the maximum stellar mass ($M_{\star}$) of massive galaxies in the early Universe appear to be higher t
Externí odkaz:
http://arxiv.org/abs/2403.02399
Using data from ALFALFA, xGASS, HI-MaNGA and the Sloan Digital Sky Survey (SDSS), we identify a sample of 47 "red but HI-rich"(RR) galaxies with $NUV-r > 5$ and unusually high HI-to-stellar mass ratios. We compare the optical properties and local env
Externí odkaz:
http://arxiv.org/abs/2312.03601
We propose an efficient and robust method to estimate the halo concentration based on the first moment of the density distribution, which is $R_1\equiv \int_0^{r_{\rm vir}}4\pi r^3\rho(r)dr/M_{\rm vir}/r_{\rm vir}$. We find that $R_1$ has a monotonic
Externí odkaz:
http://arxiv.org/abs/2310.00200
Autor:
Wang, Kai, Mo, H. J., Chen, Yangyao, Wang, Huiyuan, Yang, Xiaohu, Wang, Jiaqi, Peng, Yingjie, Cai, Zheng
We propose a novel method to quantify the assembly histories of dark matter halos with the redshift evolution of the mass-weighted spatial variance of their progenitor halos, i.e. the protohalo size history. We find that the protohalo size history fo
Externí odkaz:
http://arxiv.org/abs/2309.01039
Autor:
Hong, Hui, Wang, Huiyuan, Mo, H. J., Zhang, Ziwen, Chen, Guangwen, Luo, Wentao, Wang, Tinggui, Li, Pengfei, Li, Renjie, yao, Yao, Jiang, Aoxiang
A stellar system is dynamically hot when its kinetic energy is dominated by random motion represented by the velocity dispersion $\sigma_{\rm hot} (M_*)$. We use MaNGA data to obtain inner and outer dispersion of a galaxy, $\sigma_{\rm in}$ and $\sig
Externí odkaz:
http://arxiv.org/abs/2305.02910
The presence of massive galaxies at high $z$ as recently observed by JWST appears to contradict the current $\Lambda$CDM cosmology. Here we aim to alleviate this tension by incorporating uncertainties from three sources in counting galaxies: cosmic v
Externí odkaz:
http://arxiv.org/abs/2304.13890
We present an algorithm to extend subhalo merger trees in a low-resolution dark-matter-only simulation by conditionally matching them to those in a high-resolution simulation. The algorithm is general and can be applied to simulation data with differ
Externí odkaz:
http://arxiv.org/abs/2301.08972
Using the IllustrisTNG simulation, we study the interaction of large-scale shocks with the circumgalactic medium (CGM) and interstellar medium (ISM) of star-forming (SF) satellite galaxies in galaxy clusters. These shocks are usually produced by merg
Externí odkaz:
http://arxiv.org/abs/2209.07711
We present a new HI mass estimator which relates the HI-to-stellar mass ratio to four galaxy properties: stellar surface mass density, color index $u-r$, stellar mass and concentration index, with the scatter of individual galaxies around the mean HI
Externí odkaz:
http://arxiv.org/abs/2209.07691
Publikováno v:
A&A 667, A99 (2022)
We use a large N-body simulation to study the characteristic scales in the density gradient profiles in and around halos with masses ranging from $10^{12}$ to $10^{15} h^{-1}{\rm M_\odot}$. We investigate the profiles separately along the major (T_1)
Externí odkaz:
http://arxiv.org/abs/2206.12163