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<p>Unfortunately our speaker has had to cancel so there will be no
seminar this week.<br>
</p>
<p>Chris<br>
</p>
<div class="moz-cite-prefix">On 25/04/2022 11:09, Chris Usher wrote:<br>
</div>
<blockquote type="cite"
cite="mid:cd50c2a3-1c07-b015-33d3-f3a27be839ed@astro.su.se">
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<p>On Friday, April 29th Renske Smit (LJMU) will be giving our
next seminar via Zoom.<br>
</p>
<p><b>An ALMA view of galaxies in the Epoch of Reionization</b><br>
<br>
In the past decade hundreds of galaxy candidates have been
identified in the Epoch of Reionization (EoR), selected from
their rest-frame UV light. Only a handful of these sources,
however, have spectroscopic redshift determinations and we have
limited understanding of their properties. ALMA is currently
transforming this field by identifying massive ISM reservoirs at
z>6.5 from bright [CII] line emission. I will describe how we
obtained the first spectroscopic confirmations of galaxies in
the EoR with ALMA, where Lya often remains undetected due to the
intervening neutral IGM, and how ALMA is now rapidly becoming a
'redshift machine' for the distant Universe. With the
spectroscopic redshifts in hand, we are in a position to start
probing the physical properties of these sources, including
their fine structure line ratios, dust content and temperature,
structural properties and low-resolution kinematics. A picture
is starting to form of complex structures within these galaxies
with distinct dusty and UV-bright components which exhibit
different ISM properties. Moreover, we find evidence that some
of these galaxies are already rotation-dominated disk-like
sources, just 800 million years after the<br>
Big Bang.</p>
<div dir="auto" style="word-wrap: break-word; -webkit-nbsp-mode:
space; line-break: after-white-space;" class="">We are trying
something new this year with leaving the Zoom call open after
the formal hour of the seminar is up to allow the speaker, if
they wish, to chat informally with anyone who is interested.</div>
<div dir="auto" style="word-wrap: break-word; -webkit-nbsp-mode:
space; line-break: after-white-space;" class=""><br>
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<div dir="auto" style="word-wrap: break-word; -webkit-nbsp-mode:
space; line-break: after-white-space;" class="">Thanks<br>
Chris and Carolina</div>
<div dir="auto" style="word-wrap: break-word; -webkit-nbsp-mode:
space; line-break: after-white-space;" class=""><br>
</div>
<div dir="auto" style="word-wrap: break-word; -webkit-nbsp-mode:
space; line-break: after-white-space;" class="">Christopher
Usher is inviting you to a scheduled Zoom meeting. <br>
<br>
Topic: Astronomy Department Seminar - Renske Smit <br>
Time: Apr 29, 2022 10:30 AM Stockholm <br>
<br>
Join Zoom Meeting <br>
<a class="moz-txt-link-freetext"
href="https://stockholmuniversity.zoom.us/j/69717398551"
moz-do-not-send="true">https://stockholmuniversity.zoom.us/j/69717398551</a>
<br>
<br>
Meeting ID: 697 1739 8551 </div>
</blockquote>
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