SAZERAC presents:

The 21-cm Signal from Cosmic Dawn and the Epoch of Reionisation

January 29 2021 07:00-09:00 / 12:00-14:00 UTC

SOC: Abhirup Datta, Pratika Dayal, Adelie Gorce, Suman Majumdar, Garrelt Mellema, Rajesh Mondal, Jonathan Pritchard, and Cathryn Trott

Location: Zoom, YouTube, and Slack

One of the most highly anticipated observations related to the study of the Epoch of Reionization (EoR) in the next ten years is the 21-cm signal. Because it traces the density of neutral hydrogen in the sky as a function of frequency, it is an ideal tool to follow the EoR, either globally, with the global 21-cm signal or using statistical estimators e.g. power spectrum, multi-frequency angular power spectrum, bispectrum, etc. Many telescopes are currently running or being built in this perspective, but there are still many challenges to overcome before making a clean observation of this signal. These include successfully avoiding or removing swamping foregrounds, precisely characterising thermal noise and performing precise instrument calibration. Learning to know the signal with simulations and building efficient estimators of it, taking these limitations into account, is therefore essential to allow for a detection in the coming years. We would like to take the opportunity of this SAZERAC sip to gather the community, discuss these questions and present potential answers to the following questions:

We invite researchers, especially early-career researchers (including postgraduate students), to submit propositions of talks to answer one, or several, of these questions. In parallel, discussions will be encouraged between participants, namely through a dedicated slack channel on the SAZERAC team.

To apply for a contributed talk (10-12 mins presentation + 5 mins questions), please fill this form by December 7. The schedule for the meeting will be communicated the following week. In order to attend the talks without submitting an abstract, you can register by filling in the same form (with 'NA' in place of the abstract) or simply sign up to the SAZERAC community mailing list. By participating, you agree to follow the SAZERAC code-of-conduct. For any additional questions, feel free to get in touch with Suman Majumdar, Rajesh Mondal or Adélie Gorce.


Schedule

Observations

Theory