Zobrazeno 1 - 10
of 67
pro vyhledávání: '"Tweed, Dylan"'
Autor:
Tweed, Dylan P., Mamon, Gary A., Thuan, Trinh X., Cattaneo, Andrea, Dekel, Avishai, Menci, Nicola, Calura, Francesco, Silk, Jospeh
Publikováno v:
MNRAS 477, 1427-1450 (2018)
In the local Universe, the existence of very young galaxies (VYGs), having formed at least half their stellar mass in the last 1 Gyr, is debated. We predict the present-day fraction of VYGs among central galaxies as a function of galaxy stellar mass.
Externí odkaz:
http://arxiv.org/abs/1802.09530
Autor:
Wei, Chengliang, Li, Guoliang, Kang, Xi, Luo, Yu, Xia, Qianli, Wang, Peng, Yang, Xiaohu, Wang, Huiyuan, Jing, Yipeng, Mo, Houjun, Lin, Weipeng, Wang, Yang, Li, Shijie, Lu, Yi, Zhang, Youcai, Lim, S. H., Tweed, Dylan, Cui, Weiguang
The intrinsic alignment of galaxies is an important systematic effect in weak-lensing surveys, which can affect the derived cosmological parameters. One direct way to distinguish different alignment models and quantify their effects on the measuremen
Externí odkaz:
http://arxiv.org/abs/1801.03941
Autor:
Shi, Feng, Yang, Xiaohu, Wang, Huiyuan, Zhang, Youcai, Mo, H. J., Bosch, Frank C. van den, Luo, Wentao, Tweed, Dylan, Li, Shijie, Liu, Chengze, Lu, Yi, Yang, Lei
We extend the real-space mapping method developed in Shi et at. (2016) so that it can be applied to flux-limited galaxy samples. We use an ensemble of mock catalogs to demonstrate the reliability of this extension, showing that it allows for an accur
Externí odkaz:
http://arxiv.org/abs/1712.04163
Autor:
Wang, Huiyuan, Mo, H. J., Chen, Sihan, Yang, Yang, Yang, Xiaohu, Wang, Enci, Bosch, Frank C. van den, Jing, Yipeng, Kang, Xi, Lin, Weipeng, Lim, S. H., Huang, Shuiyao, Lu, Yi, Li, Shijie, Cui, Weiguang, Zhang, Youcai, Tweed, Dylan, Wei, Chengliang, Li, Guoliang, Shi, Feng
We examine the quenched fraction of central and satellite galaxies as a function of galaxy stellar mass, halo mass, and the matter density of their large scale environment. Matter densities are inferred from our ELUCID simulation, a constrained simul
Externí odkaz:
http://arxiv.org/abs/1707.09002
Autor:
Tweed, Dylan, Yang, Xiaohu, Wang, Huiyuan, Cui, Weiguang, Zhang, Youcai, Li, Shijie, Jing, Y. P., Mo, H. J.
The ELUCID project aims to build a series of realistic cosmological simulations that reproduce the spatial and mass distribution of the galaxies as observed in the Sloan Digital Sky Survey (SDSS). This requires powerful reconstruction techniques to c
Externí odkaz:
http://arxiv.org/abs/1704.03675
Autor:
Yang, Xiaohu, Zhang, Youcai, Lu, Tianhuan, Wang, Huiyuan, Shi, Feng, Tweed, Dylan, Li, Shijie, Luo, Wentao, Lu, Yi, Yang, Lei
Halo bias is the one of the key ingredients of the halo models. It was shown at a given redshift to be only dependent, to the first order, on the halo mass. In this study, four types of cosmic web environments: clusters, filaments, sheets and voids a
Externí odkaz:
http://arxiv.org/abs/1704.02451
Autor:
Shi, Feng, Yang, Xiaohu, Wang, Huiyuan, Zhang, Youcai, Mo, H. J., Bosch, Frank C. van den, Li, Shijie, Liu, Chengze, Lu, Yi, Tweed, Dylan, Yang, Lei
Using a method to correct redshift space distortion (RSD) for individual galaxies, we mapped the real space distributions of galaxies in the Sloan Digital Sky Survey (SDSS) Data Release 7 (DR7). We use an ensemble of mock catalogs to demonstrate the
Externí odkaz:
http://arxiv.org/abs/1608.02313
Autor:
Luo, Wentao, Yang, Xiaohu, Zhang, Jun, Tweed, Dylan, Fu, Liping, Mo, H. J., Bosch, Frank C. van den, Shu, Chenggang, Li, Ran, Li, Nan, Liu, Xiangkun, Pan, Chuzhong, Wang, Yiran, Radovich, Mario
As the first paper in a series on the study of the galaxy-galaxy lensing from Sloan Digital Sky Survey Data Release 7 (SDSS DR7), we present our image processing pipeline that corrects the systematics primarily introduced by the Point Spread Function
Externí odkaz:
http://arxiv.org/abs/1607.05406
Autor:
Lu, Yi, Yang, Xiaohu, Shi, Feng, Mo, H. J., Tweed, Dylan, Wang, Huiyuan, Zhang, Youcai, Li, Shijie, Lim, S. H.
A galaxy group catalog is constructed from the 2MASS Redshift Survey (2MRS) with the use of a halo-based group finder. The halo mass associated with a group is estimated using a `GAP' method based on the luminosity of the central galaxy and its gap w
Externí odkaz:
http://arxiv.org/abs/1607.03982
Autor:
Li, Shijie, Zhang, Youcai, Yang, Xiaohu, Wang, Huiyuan, Tweed, Dylan, Liu, Chengze, Yang, Lei, Shi, Feng, Lu, Yi, Luo, Wentao, Wei, Jianwen
Based on the star formation histories (SFH) of galaxies in halos of different masses, we develop an empirical model to grow galaxies in dark mattet halos. This model has very few ingredients, any of which can be associated to observational data and t
Externí odkaz:
http://arxiv.org/abs/1605.05088