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<p dir="ltr"
style="line-height:1.38;margin-top:0pt;margin-bottom:0pt;">Dear
all,</p>
<br>
<p dir="ltr"
style="line-height:1.38;margin-top:0pt;margin-bottom:0pt;">The
next SU astronomy departmental seminar will take place on Friday
September 1st at 10:30am in room FC61 (AlbaNova building, 6th
floor) and on zoom (<a
href="https://stockholmuniversity.zoom.us/s/61002076352"
style="text-decoration:none;" class="moz-txt-link-freetext">https://stockholmuniversity.zoom.us/s/61002076352</a>).</p>
<br>
<p dir="ltr"
style="line-height:1.38;margin-top:0pt;margin-bottom:0pt;">———————————</p>
<p dir="ltr"
style="line-height:1.38;margin-top:0pt;margin-bottom:0pt;">Speaker:
Janez Kos (University of Ljubljana)</p>
<p dir="ltr"
style="line-height:1.38;margin-top:0pt;margin-bottom:0pt;">Title:
Tidal tails of open clusters</p>
<p dir="ltr"
style="line-height:1.38;margin-top:0pt;margin-bottom:0pt;"><a
href="https://www.albanova.se/event/janez-kos/"
class="OWAAutoLink moz-txt-link-freetext">https://www.albanova.se/event/janez-kos/</a></p>
<br>
<p dir="ltr"
style="line-height:1.38;margin-top:0pt;margin-bottom:0pt;">Abstract:</p>
<p dir="ltr"
style="line-height:1.38;margin-top:0pt;margin-bottom:0pt;">Tidal
tails of open clusters have first been observed only in the recent
couple of years. Like the tails of globular clusters and satellite
galaxies, they can be used as important probes of gravitational
fields, galactic evolution, disk kinematics, and stellar
evolution. Recent progress has been possible with the arrival of
Gaia data releases, so we can find tails of structures 1000 times
smaller than globular clusters in the environment 1000 times
denser than the halo. I will present a probabilistic method that
does not directly rely on finding overdensities. We use
simulations of cluster disintegration to define likelihoods for
Gaia stars to be cluster members, and simulations of the Galactic
stellar population to define membership probabilities. In an
analysis of 500 clusters, we reliably find stars in tidal tails
1000 pc away from cluster cores. I will also discuss the need for
precise radial velocities (not used in our method), obtaining more
complete mass functions, and observed oddities that hint at
numerous kinematical processes that shape the tidal tails.</p>
<p dir="ltr"
style="line-height:1.38;margin-top:0pt;margin-bottom:0pt;">———————————</p>
<br>
<p dir="ltr"
style="line-height:1.38;margin-top:0pt;margin-bottom:0pt;">We look
forward to seeing many of you there. Thanks!</p>
<br>
<p dir="ltr"
style="line-height:1.38;margin-top:0pt;margin-bottom:0pt;">Adur
and Adélaïde</p>
<p dir="ltr"
style="line-height:1.38;margin-top:0pt;margin-bottom:0pt;"><br>
</p>
Upcoming Events:<br>
<br>
<p dir="ltr"
style="line-height:1.38;margin-top:0pt;margin-bottom:0pt;">2023-09-08
Mattia Bulla (University of Ferrara)<br>
</p>
<p dir="ltr"
style="line-height:1.38;margin-top:0pt;margin-bottom:0pt;">2023-09-15
TBD</p>
<p dir="ltr"
style="line-height:1.38;margin-top:0pt;margin-bottom:0pt;">2023-09-22
Henk Spruit (MPIA)<br>
</p>
<br>
You can subscribe to the seminars calendar in: <a
href="https://ttt.astro.su.se/ical/astro-seminars.ics"
class="moz-txt-link-freetext">https://ttt.astro.su.se/ical/astro-seminars.ics</a><br>
<p dir="ltr"
style="line-height:1.38;margin-top:0pt;margin-bottom:0pt;">(Please
note that calendar can be subject to updates)</p>
<br>
<p dir="ltr"
style="line-height:1.38;margin-top:0pt;margin-bottom:0pt;">———————————</p>
<p dir="ltr"
style="line-height:1.38;margin-top:0pt;margin-bottom:0pt;">Join
Zoom Meeting:</p>
<p dir="ltr"
style="line-height:1.38;margin-top:0pt;margin-bottom:0pt;"><a
href="https://stockholmuniversity.zoom.us/s/61002076352"
style="text-decoration:none;" class="moz-txt-link-freetext">https://stockholmuniversity.zoom.us/s/61002076352</a></p>
<p dir="ltr"
style="line-height:1.38;margin-top:0pt;margin-bottom:0pt;">Meeting
ID: 610 0207 6352</p>
<br>
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