Cosmic Cartography 2022: Exploring the Cosmic Web and Large-Scale Structure

Session

Day 3 Morning

3.1

9 Mar 2022, 09:00

Lecture Hall (Kavli IPMU, Kashiwa, Japan)

29. Cosmic cartography with Artificial Intelligence

Miguel Aragon (UNAM)

09/03/2022, 09:00

Estimating distances to galaxies is one of the key steps in the creation of LSS maps of the Universe. This is however a complex and expensive task and remains the main limiting factor in LSS analysis. In this talk I will show how using techniques based on our knowledge of LSS development and recent advances in artificial intelligence we can create maps of the distribution of galaxies with...

30. A muti-wavelength analysis of a protocluster environment at the Cosmic Noon

Sofia Gallego (Caltech)

09/03/2022, 09:20

The interplay between the large scale structure of the Universe and internal galaxy physical processes is one of the least understood questions in the field of galaxy evolution. Within this context, the study of clusters and protoclusters of galaxies provides crucial insights on the evolution of galaxies at scales and densities where environmental effects are most significant. We performed a...

31. Accelerated growth of galaxies and super-massive black holes within the cosmic web gas filaments at z=3

Hideki Umehata (ICRR, University of Tokyo)

09/03/2022, 09:40

A generic prediction in a cold dark matter universe is the presence of a network of filaments, at the intersection of which galaxies form and evolve. Now the advent of IFU instruments enables us to directly trace the gas filaments and uncover galaxy formation and evolution within the filaments. In this regard, one of the best target is the SSA22 proto-cluster at z=3.1. Our MUSE observations...

32. The HectoMAP Redshift Survey: A Platform for studying intermediate redshift Large Scale Structures

Jubee Sohn (Center for Astrophysics | Harvard & Smithsonian)

09/03/2022, 10:00

HectoMAP is a dense redshift survey that yields a detailed map of the large scale structures at z < 0.7. HectoMAP is also covered by the Hyper Suprime Cam (HSC) Subaru Strategic Program (SSP) photometric survey enabling a range of applications that combine a dense redshift survey with both strong and weak lensing maps. Based on HectoMAP, we identify 346 galaxy clusters. We use this cluster...

33. Gas-phase environmental effects in the Spiderweb protocluster at z=2.16

Jose Manuel Perez-Martinez (Tohoku University)

09/03/2022, 11:20

We use VLT/KMOS to investigate the role of the environment in the evolution of galaxies in the Spiderweb protocluster at z=2.16. Based on Hα and [NII], we measure SFRs and metallicities for 39 protocluster members as a function of local density and global environment properties. Galaxies embedded in this structure display SFRs compatible with the Main Sequence, and slightly enhanced...

34. Study environment and mass quenching through statistical analysis of RQGs

Zhiying Mao (Tohoku University)

09/03/2022, 11:40

In this work, we try to understand the environmental and mass effects of quenching. Recently-quenched galaxies (RQGs) can deliver information about the quenching scenario. A statistical sample of RQGs is necessary for studying mass and environment dependence of quenching. However, the rarity of RQGs hampers statistical spectroscopic analysis. As a pilot work, we conduct a statistical...

27. Galaxy evolution in the cosmic web at z>1.5

Michael Balogh (University of Waterloo)

The evolution of galaxies is linked to the growth of large scale structure in ways that are still poorly understood. This is, in part, because deep, wide-field spectroscopy is essential for associating individual galaxies with specific environments. I will summarize results from the GOGREEN imaging and spectroscopic survey of 21 galaxy clusters at 1<z<1.5. While we do find evidence that...

26. Resimulating gas components of of the local cosmic web

Houjun Mo (University of Massachusetts)

I will describe a method to reconstruct the initial conditions responsible for the cosmic web observed in the low-z universe, and present results of hydrodynamic simulations using these initial conditions. These simulations can be used to understand how the gas components in the local cosmic web evolve with time to produce the gaseous structures we see today.

28. Star formation and chemical evolution in plotocluster

Keita Fukushima (Osaka University)

The protocluster’s (PC’s) are the densest region in the early universe, and many of them have recently been discovered. In high-density regions, galaxy formation is faster and star formation is more active than in the low-density environment. Therefore, PC is important for understanding both the evolution of galaxies and the cosmic star formation history in the Universe. We study the PC’s star...