The 3rd Shanghai Assembly on Cosmology and Structure Formation

Session

Cosmology 1

Nov 17, 2025, 2:00 PM

Tianwen Hall

Conveners

Cosmology 1

• Ramon Miquel (IFAE Barcelona)

81. Cosmology from measurements of the matter-radiation-equality scale

David Parkinson (Korea Astronomy and Space Science Institute)

11/17/25, 2:00 PM

Cosmology and Large-scale Structure

Talk

TBD

55. Extracting non-linear information from DESI Luminous Red Galaxies by emulating pre- and post-reconstruction power spectra

Yuting Wang (National Astronomical Observatories, CAS)

11/17/25, 2:30 PM

Cosmology and Large-scale Structure

Talk

Non-linear cosmological information can be effectively extracted by jointly analyzing the pre- and post-reconstruction power spectra of large-scale structure. In this work, we present measurements of the pre- and post-reconstruction power spectra, as well as cross power spectrum between the density fields before and after the reconstruction in the Luminous Red Galaxies (LRGs) of the DESI DR1...

63. Exploring the signature of assembly bias and modified gravity using small-scale clusterings of galaxies

Yirong Wang (Shanghai Jiao Tong University)

11/17/25, 2:50 PM

Cosmology and Large-scale Structure

Talk

We apply a halo velocity bias model, $\gamma_{f}$, within the Aemulus simulation suite for General Relativity (GR) to investigate its efficacy in identifying the signature of assembly bias and Modified Gravity (MG). In the investigation of assembly bias, utilizing galaxy clustering data ranging from scales of $0.1 \sim 60 h^{-1}{\rm {Mpc}}$, we discover that our emulator model accurately...

21. Photometric redshift estimation and its characterization

Kwan Chuen Chan (Sun-Yat Sen University)

11/17/25, 3:05 PM

Cosmology and Large-scale Structure

Talk

Accuracy photometric redshift (photo-z) estimation is crucial in imaging surveys. We present the photo-z estimation by the normalizing flow, a powerful deep learning method that can approximate complex probability distribution. We demonstrate that the method is able to give reliable photo-z estimation across a number of datasets. Besides accurate photo-z estimation, the characterization of the...

80. Accurate Kappa Reconstruction Algorithm for masked shear catalog in weak lensing

Yuan Shi (Shanghai Jiao Tong University)

11/17/25, 3:25 PM

Cosmology and Large-scale Structure

Talk

Cosmic shear surveys serve as a powerful tool for mapping the underlying matter density field, including non-visible dark matter. A key challenge in cosmic shear surveys is the accurate reconstruction of lensing convergence (κ) maps from shear catalogs impacted by survey boundaries and masks, which seminal Kaiser-Squires (KS) method are not designed to handle. To overcome these limitations, we...