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<font face="Calibri,Helvetica,sans-serif,Helvetica,EmojiFont,Apple Color Emoji,Segoe UI Emoji,NotoColorEmoji,Segoe UI Symbol,Android Emoji,EmojiSymbols" color="black"><font size="3" color="#212121" style="font-family:Calibri,Helvetica,sans-serif,serif,EmojiFont"><span style="font-size:12pt; font-family:Calibri,Helvetica,sans-serif">Dear
all,</span></font><br>
<span style="font-family:Calibri,Helvetica,sans-serif; font-size:12pt"></span><br>
<span style="font-family:Calibri,Helvetica,sans-serif; font-size:12pt"></span><font size="3" color="#212121" style="font-family:Calibri,Helvetica,sans-serif,serif,EmojiFont"><span style="font-size:12pt; font-family:Calibri,Helvetica,sans-serif">On Friday the
15th of May we have the next Astronomy seminar remotely via zoom at 10:30.</span></font><br>
<span style="font-family:Calibri,Helvetica,sans-serif; font-size:12pt"></span><br>
<span style="font-family:Calibri,Helvetica,sans-serif; font-size:12pt"></span><font size="3" color="#212121" style="font-family:Calibri,Helvetica,sans-serif,serif,EmojiFont"><span style="font-size:12pt; font-family:Calibri,Helvetica,sans-serif">Our speaker
is </span></font></font><span id="docs-internal-guid-1ca369ea-7fff-b302-a35f-9a2a8bbeb9b8" style=""><span style="font-size:12pt; font-family:Arial; background-color:transparent; vertical-align:baseline; white-space:pre-wrap">Daohai Li from Lund University.</span></span><font face="Calibri,Helvetica,sans-serif,Helvetica,EmojiFont,Apple Color Emoji,Segoe UI Emoji,NotoColorEmoji,Segoe UI Symbol,Android Emoji,EmojiSymbols" color="black"><br>
<span style="font-family:Calibri,Helvetica,sans-serif; font-size:12pt"></span><br>
<span style="font-family:Calibri,Helvetica,sans-serif; font-size:12pt"></span><font size="3" color="#212121" style="font-family:Calibri,Helvetica,sans-serif,serif,EmojiFont"><span style="font-size:12pt; font-family:Calibri,Helvetica,sans-serif">Title: </span></font><font size="3" style="font-family:Calibri,Helvetica,sans-serif,serif,EmojiFont"><span style="font-size:12pt"></span></font></font><span style="color:rgb(33,33,33); font-family:Calibri,Helvetica,sans-serif; font-size:12pt">Flyby
encounters between two planetary systems</span></div>
<span style="font-family:Calibri,Helvetica,sans-serif; font-size:12pt"></span>
<div style="font-family:Calibri,Helvetica,sans-serif,serif,EmojiFont; margin-top:0px; margin-bottom:0px">
<span style="font-family:Calibri,Helvetica,sans-serif; font-size:12pt"></span><font face="Calibri,Helvetica,sans-serif,Helvetica,EmojiFont,Apple Color Emoji,Segoe UI Emoji,NotoColorEmoji,Segoe UI Symbol,Android Emoji,EmojiSymbols" color="black"><br>
<span style="font-family:Calibri,Helvetica,sans-serif; font-size:12pt"></span><font size="3" color="#212121" style="font-family:Calibri,Helvetica,sans-serif,serif,EmojiFont"><span style="font-size:12pt; font-family:Calibri,Helvetica,sans-serif">Abstract: </span></font></font><span style="color:rgb(33,33,33); font-family:Calibri,Helvetica,sans-serif; font-size:12pt">Stars
formed in clustered environment may experience stellar encounters. Here we explore a case where both encountering stars each has its own planetary system of various orbital scales and mass ranges. Besides the immediate effect of the encounter, we have also
propagated the systems post-encounter for up to Gyr. So we reveal the effect of a captured planet on a system that survives the encounter itself.</span></div>
<br style="color:rgb(33,33,33); font-family:wf_segoe-ui_normal,"Segoe UI","Segoe WP",Tahoma,Arial,sans-serif,serif,EmojiFont; font-size:13.333333015441895px">
<span style="color:rgb(33,33,33); font-family:Calibri,Helvetica,sans-serif; font-size:12pt">We find that immediately during the encounter, a planet can be ejected from its original host star or captured by the intruding star. Here, the interplanetary interactions
are negligible and a planet’s stellar-centric distance is a key factor in constraining its stability.</span><br style="color:rgb(33,33,33); font-family:wf_segoe-ui_normal,"Segoe UI","Segoe WP",Tahoma,Arial,sans-serif,serif,EmojiFont; font-size:13.333333015441895px">
<br style="color:rgb(33,33,33); font-family:wf_segoe-ui_normal,"Segoe UI","Segoe WP",Tahoma,Arial,sans-serif,serif,EmojiFont; font-size:13.333333015441895px">
<span style="color:rgb(33,33,33); font-family:Calibri,Helvetica,sans-serif; font-size:12pt">Then, during the long-term post-encounter evolution, the interplanetary forcing takes control. The larger the perturbation a system acquires immediately during the encounter,
the more likely and the earlier it becomes unstable in the later phase. Captured planets intensify the post-encounter instability and they themselves are often lost.</span><br style="color:rgb(33,33,33); font-family:wf_segoe-ui_normal,"Segoe UI","Segoe WP",Tahoma,Arial,sans-serif,serif,EmojiFont; font-size:13.333333015441895px">
<br style="color:rgb(33,33,33); font-family:wf_segoe-ui_normal,"Segoe UI","Segoe WP",Tahoma,Arial,sans-serif,serif,EmojiFont; font-size:13.333333015441895px">
<span style="color:rgb(33,33,33); font-family:Calibri,Helvetica,sans-serif; font-size:12pt">Full details can be found in Li, Mustill & Davies 2019 (MNRAS, 488, 1366) and in Li, Mustill & Davies 2020 (ArXiv:2002.09271).</span><span style="font-family:Calibri,Helvetica,sans-serif; font-size:12pt">
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<div style="font-family:Calibri,Helvetica,sans-serif,serif,EmojiFont; margin-top:0px; margin-bottom:0px">
<a href="https://www.albanova.se/event/astronomy-seminar-daohai-li/" target="_blank" rel="noopener noreferrer" id="LPlnk505421" style="font-family:wf_segoe-ui_normal,"Segoe UI","Segoe WP",Tahoma,Arial,sans-serif,serif,EmojiFont; font-size:15px" previewremoved="true">https://www.albanova.se/event/astronomy-seminar-daohai-li/</a><font face="Calibri,Helvetica,sans-serif,serif,EmojiFont"><br>
</font></div>
<span style="font-family:Calibri,Helvetica,sans-serif; font-size:12pt"></span>
<div style="font-family:Calibri,Helvetica,sans-serif,serif,EmojiFont; margin-top:0px; margin-bottom:0px">
<span style="font-family:Calibri,Helvetica,sans-serif; font-size:12pt"></span><br>
<span style="font-family:Calibri,Helvetica,sans-serif; font-size:12pt"></span><font size="3" color="#212121"><span style="font-size:12pt; font-family:Calibri,Helvetica,sans-serif">We will have the colloquium using zoom. You will find the invitation at the end
of this email.</span></font><br>
<span style="font-family:Calibri,Helvetica,sans-serif; font-size:12pt"></span><br>
<span style="font-family:Calibri,Helvetica,sans-serif; font-size:12pt"></span><font size="3" color="#212121"><span style="font-size:12pt; font-family:Calibri,Helvetica,sans-serif">Some guidelines:</span></font><br>
<span style="font-family:Calibri,Helvetica,sans-serif; font-size:12pt"></span><br>
<span style="font-family:Calibri,Helvetica,sans-serif; font-size:12pt"></span><font size="3" color="#212121"><span style="font-size:12pt; font-family:Calibri,Helvetica,sans-serif">1) Join the session with your microphone muted.</span></font><br>
<span style="font-family:Calibri,Helvetica,sans-serif; font-size:12pt"></span><br>
<span style="font-family:Calibri,Helvetica,sans-serif; font-size:12pt"></span><font size="3" color="#212121"><span style="font-size:12pt; font-family:Calibri,Helvetica,sans-serif">2) When you have a question, press the “raise hand button” and wait till you
are asked to ask your question. </span></font><br>
<span style="font-family:Calibri,Helvetica,sans-serif; font-size:12pt"></span><br>
<span style="font-family:Calibri,Helvetica,sans-serif; font-size:12pt"></span><font size="3" color="#212121"><span style="font-size:12pt; font-family:Calibri,Helvetica,sans-serif">3) The session will be online from 10:20, please join at least a few minutes
early as we would like to start 10:30 sharp.</span></font><br>
<span style="font-family:Calibri,Helvetica,sans-serif; font-size:12pt"></span><br>
<span style="font-family:Calibri,Helvetica,sans-serif; font-size:12pt"></span><font size="3" color="#212121"><span style="font-size:12pt; font-family:Calibri,Helvetica,sans-serif">We hope to see all of you there!</span></font><br>
<span style="font-family:Calibri,Helvetica,sans-serif; font-size:12pt"></span><br>
<span style="font-family:Calibri,Helvetica,sans-serif; font-size:12pt"></span><font size="3" color="#212121"><span style="font-size:12pt; font-family:Calibri,Helvetica,sans-serif">Arjan & Cristina</span></font><br>
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<font size="3" color="#212121"><span style="font-size:12pt"><br>
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<font face="Helvetica,serif,EmojiFont" size="1" color="#212121"><span style="font-size:13.32px">=============================================</span></font></div>
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<font face="Helvetica,serif,EmojiFont" size="1" color="#212121"><span style="font-size:13.32px"><br>
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<div style="margin-top: 0px; margin-bottom: 0px;">Cristina Barbarino is inviting you to a scheduled Zoom meeting.</div>
<div style="margin-top: 0px; margin-bottom: 0px;"><br>
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<div style="margin-top: 0px; margin-bottom: 0px;">Topic: Astronomy colloquium May 15th</div>
<div style="margin-top: 0px; margin-bottom: 0px;">Time: May 15, 2020 10:30 AM Stockholm</div>
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<div style="margin-top: 0px; margin-bottom: 0px;">Meeting ID: 671 5987 5558</div>
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<div style="margin-top: 0px; margin-bottom: 0px;">Find your local number: <a href="https://stockholmuniversity.zoom.us/u/cdiAdC3Rk3" class="OWAAutoLink" id="LPlnk149326" previewremoved="true">
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-------------------------------------------<br>
Dr. Cristina Barbarino<br>
Stockholm University<br>
AlbaNova University Center<br>
Department of Astronomy<br>
SE-106 91 Stockholm - Sweden<br>
Tel: +46 (0) 85537 8538</div>
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<a href="https://www.su.se/english/profiles/cbarb" class="OWAAutoLink" id="LPNoLP">https://www.su.se/english/profiles/cbarb</a><br>
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