Astrophysics Seminar

Astrolunch: Barak Zackay

Sun, 08/12/2019 - 12:00 to 13:00

* Note the unusual timing
Title: Detecting Gravitational Waves Using the public LIGO-VIRGO data: Doubling the sample of Binary Black Hole Mergers

Astrolunch: Saleem Zaroubi (Open University/Kapteyn)

Tue, 18/02/2020 - 12:30 to 13:30

Title:
The status of the high-redshift 21 cm experiments
Abstract:
The last decade has witnessed the emergence of the 21 cm cosmology which aims at probing the Universe with the 21 cm hyperfine transition. This technique has been applied especially to the era of the so-called Cosmic Dawn and the Epoch of Reionization. I will review the current status of the experiments designed to probe these two epochs and especially focus on the latest results from the LOFAR telescope which has just published new upper limits.

Astrolunch: Jason Spyromilio (ESO)

Mon, 11/11/2019 - 14:00 to 15:00

ESO's Extremely Large Telescope
The 39-m ELT is under construction by the European Southern Observatory. When completed
it will be the largest optical/NIR telescope in the world at one of the best sites. The talk shall
focus on the challenges associated with building this telescope and will describe the first generation
instrumentation complement and science drivers.

Astrolunch: Itamar Reis (TAU)

Tue, 21/01/2020 - 12:30 to 13:30

Modeling the 21cm signal
Upcoming observations of the 21cm signal will probe the properties of the first stars and galaxies that formed in the universe. As the signal is shaped by many different processes, modeling will be required in order to extract information about these first radiation sources. In the talk I will describe ongoing efforts of modeling the signal, focusing on effects that are commonly neglected, but are found to have a significant impact on predictions.