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<font face="Calibri,Helvetica,sans-serif,serif,EmojiFont" size="2"><span style="font-size:16px"><font face="wf_segoe-ui_normal,Segoe UI,Segoe WP,Tahoma,Arial,sans-serif,serif,EmojiFont" size="2" color="#212121"><span style="font-size:15px">A reminder of today’s
Astronomy seminar.</span></font><br>
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<font face="Calibri,Helvetica,sans-serif,serif,EmojiFont" size="2"><span style="font-size:16px"><font face="wf_segoe-ui_normal,Segoe UI,Segoe WP,Tahoma,Arial,sans-serif,serif,EmojiFont" size="2" color="#212121"><span style="font-size:15px">Arjan & Cristina</span></font></span></font></div>
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<div id="x_divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" color="#000000" style="font-size:11pt"><b>Da:</b> Alla-at-astro.su.se <alla-at-astro.su.se-bounces@lists.su.se> per conto di Arjan Bik <arjan.bik@astro.su.se><br>
<b>Inviato:</b> lunedě 10 febbraio 2020 15:13<br>
<b>A:</b> alla@astro.su.se; people@nordita.org; seminars-announce.astro@su.se; cops@fysik.su.se; epi@particle.kth.se<br>
<b>Oggetto:</b> [alla@astro.su.se] Astronomy Seminar Friday 14/2: 10:30 FC61: Per Calissendorff</font>
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<div class="PlainText">Dear all,<br>
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On Friday the 14th of February we have the next Astronomy seminar in room FC61 at 10:30<br>
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Our speaker is Per Calissendorff (SU), he will present his PhD seminar:<br>
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Title: Characterizing emblematic low-mass stellar and substellar binaries<br>
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Abstract: <br>
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Multiplicity is one of the foremost diagnostics for the formation processes of brown dwarfs, and thus low-mass substellar binaries lie at the nexus of astronomical interests, representing the youngest products of star formation at the very lowest masses, and
at the same time serve as analogues to directly imaged giant planets. Due to the lack of a statistical significant sample readily available, multiplicity is poorly constrained at the lowest stellar and substellar mass-regimes, which in turn has consequences
for theoretical evolutionary models to fail to accurately predict masses from measured luminosities. By monitoring visual low-mass binaries over longer periods of time, applying precise astrometry, and employing high-contrast imaging techniques, we are able
to identify and characterize several new benchmark binary and higher hierarchical systems, constraining their ages, brightnesses and masses, which can be used to calibrate said evolutionary models. The detection of these systems also allow us place constraints
on the multiplicity frequency for young brown dwarfs, which compared to the older field population provides insight to their formation mechanisms and dynamical evolution.<br>
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<a href="https://www.albanova.se/event/astronomy-seminar-characterizing-emblematic-low-mass-stellar-and-substellar-binaries/" id="LPlnk614803" previewremoved="true">https://www.albanova.se/event/astronomy-seminar-characterizing-emblematic-low-mass-stellar-and-substellar-binaries/</a><br>
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Upcoming events:<br>
21/02 (Fri) @ 10:30: Beibei Liu (Lund)<br>
28/02 (Fri) @ 10:30: Kathryn Kreckel (MPIA and ARI, Heidelberg)<br>
06/03 (Fri) @ 10:30: Leonardo Tartaglia (SU)<br>
13/03 (Fri) @ 10:30: Hannah Schunker (MPS, Göttingen)<br>
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Kind regards,<br>
Cristina & Arjan<br>
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Dr. Arjan Bik<br>
Stockholm University<br>
AlbaNova University Center<br>
Department of Astronomy<br>
SE-106 91 Stockholm - Sweden<br>
Tel: +46 (0) 85537 8549<br>
<a href="https://www.su.se/english/profiles/abik" id="LPlnk204676" previewremoved="true">https://www.su.se/english/profiles/abik</a><br>
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