[Astronomy seminar] [alla at astro.su.se] Astronomy seminar Friday 10:30 FC61: Sambit Giri

[Astronomy seminar announcements]

A small correction to the listed March activities: Tine Libbrecht's PhD 
defence is on April 26 at 13:00 (in FB52).

All the best, Alexis

On 2019-03-04 11:19 , Alexis Brandeker wrote:
> Time & location: Friday 8/3, 10:30 in FC61
>
> Speaker: Sambit Giri (SU)
>
> Title: Tomographic studies of 21-cm signal during reionization
>
> Abstract:
> The formation of the first luminous sources in the Universe, such as the
> first generation of stars and accreting black holes, led to the
> ionization of hydrogen gas present in the intergalactic medium (IGM).
> This period in which the Universe transitioned from a cold and neutral
> state to a predominantly hot and ionized state is known as the Epoch of
> Reionization (EoR). The EoR is one of the least understood epochs in the
> Universe's evolution mostly due to the lack of direct observations. We
> can probe the reionization process with the  21-cm signal, produced by
> the spin-flip transition in neutral hydrogen. However, current radio
> telescopes have not been able to detect this faint signal. The
> low-frequency component of the Square Kilometre Array (SKA-Low), will be
> sensitive enough not only to detect the 21-cm signal produced during EoR
> but also to produce images of its distribution on the sky. A sequence of
> such 21-cm images from different redshifts will constitute a
> three-dimensional, tomographic, data set. Before the SKA comes online,
> it is prudent to develop methods to analyse these tomographic images in
> a statistical sense. In this seminar, I will describe the EoR
> information encoded in the 21-cm signal and present the tomographic
> analysis methods that will be useful to decode this information.
>
> Other Friday activities in March:
>
> 15/3 (Fri) @ 10:30 : Richard Anderson (ESO)
> 15/3 (Fri) @ 13:00 : PhD defence Ruben Asensio Torres (SU)
> 22/3 (Fri) @ 13:00 : PhD defence Tine Libbrecht (SU)
> 29/3 (Fri) @ 10:30 : Emilia Kilpua (Helsinki)
>
> All welcome!
>       Alexis Brandeker (Astronomy seminar organiser VT 2019)
>