Collaboration Workshop on Cosmology and Galaxy Formation

Session

(sat)Galaxy-(sub)halo

Jun 21, 2023, 9:00 AM

3rd floor meeting room (SJTU & Suzhou Bay)

Conveners

(sat)Galaxy-(sub)halo

• 慧元 王 (中国科学技术大学)

(sat)Galaxy-(sub)halo

• Zhongxu Zhai (Shanghai Jiao Tong University)

10. Constructing the connection between dark matter halos and emission line galaxies (ELGs)

Yipeng Jing

6/21/23, 9:00 AM

Halo

Talk

In ongoing and future cosmological surveys, such as DESI, PFS, Euclid, CSST, and WFIRST, ELGs are a critically major tracer to explore the acceleration of the cosmic expansion and to test modified gravity theories. To achieve the high-precision observations aimed by the surveys on the Hubble parameter, cosmic growth rate and neutrino mass etc, one needs to have an accurate understanding of...

41. Photometric Objects Around Cosmic Webs (PAC) Delineated in a Spectroscopic Survey. VI. High Satellite Fraction of Quasars Around Galaxies at Redshift 0.8 - 1.0

shanquan gui (Shanghai JiaoTong University)

6/21/23, 9:25 AM

Halo

Talk

The Photometric objects Around Cosmic webs (PAC) approach developed in \cite{2022ApJ...925...31X} has the advantage of making full use of the spectroscopic and deeper photometric surveys. With the merits of PAC, we can accurately measure quasars-galaxy cross-correlations at small scale down to $0.1\,h^{-1}{\rm{Mpc}}$ and at different stellar mass bins. We calculate the excess surface density...

22. The measurements of galaxy abundance and clustering at 0<z<2

佳程 孟 (清华大学天文系)

6/21/23, 9:45 AM

Halo

Talk

This work consists of two parts. The first is the study of the galaxy population in the SDSS galaxy groups with DESI imaging data. The second is the study on how to measure galaxy abundance and clustering at high redshift from incomplete spectroscopic data.

In the first part, we use the most recent data release (DR9) of the DESI legacy imaging survey and SDSS galaxy groups to measure the...

35. The spatial distribution of satellite galaxies

青 谷 (国家天文台)

6/21/23, 10:30 AM

Halo

Talk

In the framework of the standard cosmological model, dark matter halos grow by hierarchical clumping. The spatial distribution of satellite galaxies is closely related to the nature of the halo and its accretion history. Firstly, using SDSS and Millennium simulations we study the spatial distribution of satellites in galaxy clusters. We find that the distribution of satellite galaxies is...

36. Mining the Information Content of Member Galaxies in Halo Mass Modeling

艳蕊 周

6/21/23, 10:50 AM

Halo

Talk

Motivated by previous findings that the magnitude gap between certain satellite galaxies and the central galaxy can be used to improve the estimation of halo mass, we carry out a systematic study of the information content of different member galaxies in the modeling of the host halo mass using a machine-learning approach. We employ data from the hydrodynamical simulation IllustrisTNG and...

24. Measuring the conditional luminosity and stellar mass functions of galaxies by combining the DESI LS DR9, SV3 and Y1 data

Yirong Wang (上海交通大学)

6/21/23, 11:10 AM

Halo

Talk

In this investigation, we leverage the combination of DESI legacy imaging surveys DR9, survey vilification (sv3), and year 1 (Y1) spectroscopic redshift data to estimate the conditional luminosity and stellar mass functions (CLFs & CSMFs) of galaxies across various halo mass bins and redshift ranges, with the help of a realistic DESI mock galaxy redshift survey (MGRS) generated from a...

55. MAHGIC: A model adapter for the halo-galaxy inter-connection

Yangyao Chen

6/21/23, 11:30 AM

Talk