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Dear all,<br>
<br>
The next SU astronomy departmental seminar will take place on
Wednesday May 8 at 10:30am in room FC61 (AlbaNova building, 6th
floor) and on zoom
(<a class="moz-txt-link-freetext" href="https://stockholmuniversity.zoom.us/j/69370388905">https://stockholmuniversity.zoom.us/j/69370388905</a>).<br>
___________________<br>
<br>
Speaker: Ivelin Georgiev (Stockholm University)<br>
Title: Studies of the intergalactic medium during the Epoch of
Reionization - Understanding observational probes with simulations<br>
Event: <a href="https://indico.fysik.su.se/e/ivelin_georgiev"
class="js-copy-to-clipboard moz-txt-link-freetext"
data-clipboard-text="https://indico.fysik.su.se/e/ivelin_georgiev"
data-clipboard-action="copy"
data-qtip-oldtitle="Copy link to clipboard">https://indico.fysik.su.se/e/ivelin_georgiev
</a><br>
<br>
Abstract:<br>
The first billion years of the Universe is a unique era, marked by
the formation of the first stars, galaxies, and accreting black
holes, which release ionising radiation into the intergalactic
medium (IGM). As a result, these luminous sources initiate a period
during which the cold and dense IGM, primarily consisting of neutral
hydrogen (HI), is heated and ionised. We refer to this era as the
Epoch of Reionization (EoR). It is a multi-scale event that evolves
with time and depends on the nature of the astrophysical processes
that govern the formation of stars and galaxies, as well as the
fundamental cosmology that defines the properties of the large-scale
IGM. <br>
<br>
In this talk, I examine the various probes of the EoR with a focus
on those explored in my PhD thesis. One key probe is the 21 cm
signal emitted due to the hyperfine transition of HI atoms in the
IGM. I discuss how we can decompose the terms comprising the 21 cm
power spectrum and what this can tell us about the Universe on large
scales. Moreover, I describe how we can relate this observable
patchy kinetic Sunyaev-Zel'dovich effect, observed as a foreground
to the primary Cosmic Microwave Background temperature anisotropies
on small scales, in order to learn more about the properties of
reionization. Lastly, I will show how the observables inferred from
quasar data can tell us how the EoR concluded and the impact of
Lyman Limit Systems on the process.<br>
<br>
___________________<br>
<br>
We look forward to seeing many of you there. Thanks!<br>
<br>
Adur, Adélaïde, and Sanja<br>
<br>
Upcoming Events:<br>
<br>
2024-05-14 Gayathri Viswanath (**Seminar on TUESDAY**)<br>
2024-05-17 Elena Khomenko<br>
2024-05-24 Matteo Messa<br>
2024-05-31 Oleg Kochukhov (**Last seminar before summer break**)<br>
<br>
You can subscribe to the seminars calendar in:<br>
<a class="moz-txt-link-freetext" href="https://ttt.astro.su.se/ical/astro-seminars.ics">https://ttt.astro.su.se/ical/astro-seminars.ics</a><br>
(Please note that calendar can be subject to updates)<br>
___________________<br>
<br>
Join Zoom Meeting:<br>
<a class="moz-txt-link-freetext" href="https://stockholmuniversity.zoom.us/j/69370388905">https://stockholmuniversity.zoom.us/j/69370388905</a><br>
Meeting ID: 693 7038 8905<br>
<br>
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