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<div><font size="2"><span style="font-size:12pt">Dear all,</span></font></div>
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<div><font size="2"><span style="font-size:12pt">On Friday March 26 at 10:30 we will have the next Astronomy Seminar, remotely via zoom.</span></font></div>
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<div><font size="2"><span style="font-size:12pt">Our speaker is Matthew Kenworthy from </span></font><font face="Calibri,Helvetica,sans-serif,serif,EmojiFont" size="3" color="black"><span id="divtagdefaultwrapper" style="font-size:12pt"><font face="Calibri,Helvetica,sans-serif,EmojiFont,Apple Color Emoji,Segoe UI Emoji,NotoColorEmoji,Segoe UI Symbol,Android Emoji,EmojiSymbols" size="3" color="black"><span id="divtagdefaultwrapper" style="font-size:12pt"><font face="Calibri,sans-serif,serif,EmojiFont" size="2" color="black"><span style="font-size:12pt">Leiden
Observatory, The Netherlands</span></font></span></font></span></font><font size="2"><span style="font-size:12pt">.</span></font></div>
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<div><font size="2"><span style="font-size:12pt">Title: </span></font><font face="Calibri,Helvetica,sans-serif,serif,EmojiFont" size="3" color="black"><span id="divtagdefaultwrapper" style="font-size:12pt"><font face="Calibri,Helvetica,sans-serif,EmojiFont,Apple Color Emoji,Segoe UI Emoji,NotoColorEmoji,Segoe UI Symbol,Android Emoji,EmojiSymbols" size="3" color="black"><span id="divtagdefaultwrapper" style="font-size:12pt"><font face="Calibri,sans-serif,serif,EmojiFont" size="2" color="black"><span style="font-size:11pt"><span style="color:rgb(33,33,33); font-family:wf_segoe-ui_normal,"Segoe UI","Segoe WP",Tahoma,Arial,sans-serif,serif,EmojiFont; font-size:12pt">Seeing
the shadows of circumplanetary disks: the cases of J1407 and J0600</span></span></font></span></font></span></font></div>
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<div><font size="2"><span style="font-size:12pt">Abstract: </span></font><font face="Calibri,Helvetica,sans-serif,serif,EmojiFont" size="3" color="black"><span id="divtagdefaultwrapper" style="font-size:12pt"><font face="Calibri,Helvetica,sans-serif,EmojiFont,Apple Color Emoji,Segoe UI Emoji,NotoColorEmoji,Segoe UI Symbol,Android Emoji,EmojiSymbols" size="3" color="black"><span id="divtagdefaultwrapper" style="font-size:12pt"><font face="Calibri,sans-serif,serif,EmojiFont" size="2" color="black"><span style="font-size:12pt">
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<span style="font-size:12pt">Gas giant planets form by the transfer of material from the circumstellar disk, through a circumplanetary disk (CPD) and onto the planet. In the last stages of formation, the circumstellar material is exhausted and the remaining
CPD accretes onto the gas giant planet, with moons forming and carving out transient ring-like structures in the planet's Hill sphere. These exorings can be hundreds of times larger than Saturn's rings, up to one astronomical unit in diameter.</span></div>
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<span style="font-size:12pt">In 2015, the young star J1407 underwent a complex and deep 56 day eclipse that had photometric variations down to timescales of hours. We interpret this as the transit of a giant ring system within the Hill sphere of a substellar
companion. Amongst the follow up observations, the ALMA array detected a sub-mm source consistent with emission from warm dust in a giant ring system near J1407, and over the past year, we have been intensively monitoring another potential transiting ring
system towards the nearby star J0600. </span></div>
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<span style="font-size:12pt">In this talk we discuss our observations of J1407 and J0600, and show how they can provide insight into the last stages of giant planet and moon formation.</span></div>
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<div><a href="https://www.northumbria.ac.uk/about-us/our-staff/j/natasha-jeffrey/" target="_blank" rel="noopener noreferrer" id="LPlnk466675" previewremoved="true"><span id="LPlnk466675"></span></a><a href="https://www.albanova.se/event/matthew_kenworthy/" target="_blank" rel="noopener noreferrer" id="LPlnk704644" previewremoved="true"><span id="LPlnk704644" style="font-size:12pt">https://www.albanova.se/event/matthew_kenworthy/</span></a></div>
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<div><font size="2"><span style="font-size:12pt">We will have the colloquium using zoom. You will find the invitation at the end of this email.</span></font></div>
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<div><font size="2"><span style="font-size:12pt">Some guidelines:</span></font></div>
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<div><font size="2"><span style="font-size:12pt">1) Join the session with your microphone muted.</span></font></div>
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<div><font size="2"><span style="font-size:12pt">2) When you have a question, press the “raise hand button” and wait till you are asked to ask your question. </span></font></div>
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<div><font size="2"><span style="font-size:12pt">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></div>
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<div><font size="2"><span style="font-size:12pt">We hope to see all of you there!</span></font></div>
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<div><font size="2"><span style="font-size:12pt">Matthias & Janet</span></font></div>
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<div><font size="2"><span style="font-size:12pt">Upcoming events: </span></font></div>
<span style="font-size:12pt"></span><span style="font-size:12pt"></span><font size="2"><span style="font-size:12pt">02/04: Good Friday (holiday)</span></font></div>
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<font size="2"><span style="font-size:12pt">09/04: Patrick Antolin (Northumbria University, Newcastle, UK)</span></font><font size="2"><span style="font-size:12pt"><br>
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<div><font size="2"><span style="font-size:12pt">16/04: Paul Molliere (Max Planck Institute for Astronomy, Heidelberg, Germany)</span></font><font size="2"><span style="font-size:12pt"><br>
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<div><font size="2"><span style="font-size:12pt">===================================================</span></font></div>
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<span style="font-size:12pt"></span><span style="font-size:12pt">Participation link: </span><a href="https://stockholmuniversity.zoom.us/j/66615940462" target="_blank" rel="noopener noreferrer" id="LPlnk776006" previewremoved="true"><span id="LPlnk776006" style="font-size:12pt"></a><a href="https://stockholmuniversity.zoom.us/j/64716729733" class="OWAAutoLink" id="LPlnk331730" previewremoved="true">https://stockholmuniversity.zoom.us/j/64716729733</a></span><br>
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