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An Extended Halo-based Group/Cluster finder: application to the DESI legacy imaging surveys DR8
Xiaohu Yang, Haojie Xu, Min He +20
We extend the halo-based group finder developed by \citet[][]{Yang2005a} to use data {\it simultaneously} with either photometric or spectroscopic redshifts. A mock galaxy redshift…
On the halo-mass and radial scale dependence of the lensing is low effect
Johannes U. Lange, Alexie Leauthaud, Sukhdeep Singh +4
The canonical CDM cosmological model makes precise predictions for the clustering and lensing properties of galaxies. It has been shown that the lensing amplitude of galaxies in…
Evidence for galaxy assembly bias in BOSS CMASS redshift-space galaxy correlation function
Sihan Yuan, Boryana Hadzhiyska, Sownak Bose +2
Building accurate and flexible galaxy-halo connection models is crucial in modeling galaxy clustering on non-linear scales. Recent studies have found that halo concentration by its…
Populating HI gas in dark matter halos: I. method
Yi Lu, Xiaohu Yang, Chengze Liu +4
We combine data from the Sloan Digital Sky Survey (SDSS) and the Arecibo Legacy Fast ALFA Survey (ALFALFA) to establish an empirical model for the HI gas content within dark matter…
Galaxy-group (halo) alignments from SDSS DR7 and the ELUCID simulation
Youcai Zhang, Xiaohu Yang, Hong Guo
Based on galaxies from the Sloan Digital Sky Survey (SDSS) and subhalos in the corresponding reconstructed region from the constrained simulation of ELUCID, we study the alignment…
Direct Measurement of the HI-Halo Mass Relation through Stacking
Hong Guo, Michael G. Jones, Martha P. Haynes +1
We present accurate measurements of the total HI mass in dark matter halos of different masses at z ~ 0, by stacking the HI spectra of entire groups from the Arecibo Fast Legacy AL…