Overview

The elucidation of unknown components of the Universe, such as dark energy and dark matter, is a major problem in modern cosmology. Precise astronomical observational data are increasingly crucial for understanding the dark side of the Universe.

We propose the first joint Melbourne-Nagoya workshop on cosmology. The workshop will focus on discussing the previous research underlying the work of our two institutions and how our work fills gaps and addresses open questions in cosmology and astrophysics.

The workshop aims to achieve the following outcomes:
- To get to know each other and learn about each other's research specialties and interests.
- To review the current state of the art in cosmology and astrophysics in Melbourne and Nagoya universities, especially on dark energy and dark matter, and identify the critical open questions and challenges that can be addressed by combining the two sides' expertise.
- To exchange ideas and insights on the theoretical and observational aspects of large-scale structure, cosmic microwave background radiation, and neutral hydrogen 21cm line, and explore their synergies and complementarities.

This workshop is supported by JSPS grant number 21H04467, JST FOREST Program JPMJFR20352935, and Nagoya–Melbourne Joint Research Workshops Fund.

Date and Place

19th - 21st February, 2024

ES Building 6F #635, Nagoya University

Registration

Please register at the link below.
Deadlines: 9th February, 2024

Google Form

Invited Speakers

Shintaro Yoshiura (NAOJ)
"21cm line from Cosmic Dawn and Dark Ages"

Takeshi Hiramatsu (Rikkyo U.)
"CMB constraints on extended theories of gravity"

Shun Arai (Nagoya U.)
"High redshift CMB lensing tomography as a new probe of cosmology and gravity"

Shohei Saga (Institut d'Astrophysique de Paris / Nagoya U.)
"Relativistic effects on redshift-space distortions"

Teppei Minoda (Tsinghua U.)
"Probing primordial fluctuations with the 21-cm line and reionization history"

Clément Leloup (Kavli IPMU)
"The LiteBIRD space mission"

Confirmed Speakers

Kevin Levy (U. of Melbourne)

Shintaro Hayashi (Nagoya U.)

Sabrina Berger (U. of Melbourne)

Genki Naruse (Nagoya U.)

Balu Sreedhar (U. of Melbourne)

Fillipo Anzuini (U. of Melbourne)

Ryoto Inui (Nagoya U.)

Keitaro Ishikawa (Nagoya U.)

LOC

Kenji Hasegawa, Shintaro Hayashi, Keitaro Ishikawa

Contact

Kiytomo Ichiki
e-mail: ichiki.kiyotomo.a9@f.¥
["¥" = mail.nagoya-u.ac.jp]

Program:

Invited talk	30min + 15min
Short talk	15min + 05min

19th Feb. (Mon.)

10:25	10:30	Opening
10:30	11:15	Shun Arai	High redshift CMB lensing tomography as a new probe of cosmology and gravity
11:15	13:30	Discussion & Lunch
13:30	14:15	Clément Leloup	The LiteBIRD space mission
14:15	14:35	Kevin Levy	CMB Lensing Maps from the SPT-3G Summer-Fields
14:35	15:20	Discussion & Coffee
15:20	15:40	Shintaro Hayashi	Early Dark Energy
15:40	16:00	Keitaro Ishikawa	Exploring Relationship between Assembly bias and Halo properties for Dark Emulator
16:00	16:20	Kiyotomo Ichiki & Christian Reichardt	Activities at Nagoya and Melbourne Universities

20th Feb. (Tue.)

09:45	10:10		Contribution talks (if any)
10:10	10:30	Ryoto Inui	Constraints on Non-Gaussian primordial curvature perturbation from the LIGO-Virgo-KAGRA collaboration
10:30	11:15	Shintaro Yoshiura	21cm line from Cosmic Dawn and Dark Ages
11:15	13:30	Discussion & Lunch
13:30	14:15	Teppei Minoda	Probing primordial fluctuations with the 21-cm line and reionization history
14:15	14:35	Sabrina Berger	Using gradient descent-like methods to reconstruct the matter density field from 21cm brightness maps during the EoR
14:35	15:20	Discussion & Coffee
15:20	15:40	Genki Naruse	Mini-halo 21cm absorption
15:40	16:00	Balu Sreedhar	Simulations of the Epoch of Reionisation
16:00	16:20		Contribution talks (if any)
18:00		Dinner

21st Feb. (Wed.)

09:45	10:30		Contribution talks (if any)
10:30	11:15	Takashi Hiramatsu	CMB constraints on extended theories of gravity
11:15	13:30	Discussion & Lunch
13:30	14:15	Shohei Saga	Relativistic effects on redshift-space distortions
14:15	14:35	Fillipo Anzuini	Exploring the Early Universe with lattice simulations
14:35	15:20	Discussion & Coffee
15:20	15:40	Aman Chokshi	Instrumental challenges of an Epoch of Reionization Detection
15:40	16:00	Mahsa Rahimi	Searching for anisotropic cosmic birefringence with CMB data from South Pole Telescope
16:00	16:05	Closing