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<div class=""><font face="Arial" size="3" class=""><span class=""><font style="caret-color: rgb(101, 101, 101);" class="">Please <a href="https://docs.google.com/spreadsheets/d/11p1LK9KqCg4niIfDtDlFc_3q6IgTZSoNO_zsKdPIYUQ/edit?usp=sharing" class="">sign up</a> to
meet with our speaker, </font></span><span style="caret-color: rgb(101, 101, 101);" class="">Fiona Nichols-Fleming (Ph.D. student from Brown University) next Tuesday 11/29 (virtual meetings are also possible).</span></font></div>
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Fiona will be talking about her work on </span><span style="caret-color: rgb(101, 101, 101);" class="">Psyche — she has, however, </span><a href="https://www.planetaryfiona.com/publications" class="">published</a><span style="caret-color: rgb(101, 101, 101);" class=""> work
on Titan, Pluto, </span><span style="caret-color: rgb(101, 101, 101);" class="">Dione, and even solar spots!</span></font></div>
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<div class=""><span style="caret-color: rgb(101, 101, 101);" class=""><font face="Arial" size="3" class="">Details of her talk are listed below.</font></span></div>
<div class=""><font class="" face="Arial" size="3"><span style="caret-color: rgb(101, 101, 101);" class=""><br class="">
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<div class=""><font class="" face="Arial" size="3"><span style="caret-color: rgb(101, 101, 101);" class="">Best,</span></font></div>
<div class=""><font class="" face="Arial" size="3"><span style="caret-color: rgb(101, 101, 101);" class="">Jason Soderblom</span></font></div>
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<div class=""><strong class="" style="caret-color: rgb(101, 101, 101); color: rgb(101, 101, 101); font-family: Arial, "Helvetica Neue", Helvetica, sans-serif; font-size: 16px;">Planetary Lunch Seminar – Fiona Nichols-Fleming (Brown University)</strong></div>
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Tuesday November 29th @ 12:30 pm to 1:30 pm | Room 54-517 and <a href="https://mit.zoom.us/j/96525774689" class="">Zoom</a></p>
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<div class=""><strong class="" style="caret-color: rgb(101, 101, 101); color: rgb(101, 101, 101); font-family: Arial, "Helvetica Neue", Helvetica, sans-serif; font-size: 16px;">Title: </strong><font color="#656565" face="Arial, Helvetica Neue, Helvetica, sans-serif" size="3" class=""><span style="caret-color: rgb(101, 101, 101);" class="">Core
Solidification & Contraction on 16 Psyche</span></font></div>
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<div class=""><strong class="" style="caret-color: rgb(101, 101, 101); color: rgb(101, 101, 101); font-family: Arial, "Helvetica Neue", Helvetica, sans-serif; font-size: 16px;">Abstract:</strong><font color="#656565" face="Arial" class=""><span class=""><span class=""><span style="font-size: 14px;" class=""> Asteroid
16 Psyche is a puzzling body with both evidence of a metal rich surface and a density of only about half that of pure iron. This potential contradiction has led to a lot of discussion of the true mass fraction of metal contained in Psyche and thus the associated
formation scenario. In addition to the iron mass fraction, the process of core solidification is important for the thermal evolution of an undisrupted body, but there are still many uncertainties in modeling this process for low-pressure cores. In particular,
the choice between inward vs. outward solidification will have a significant influence on the inferred thermal evolution of a Psyche-sized body. Here, we model the thermal evolution of a Psyche-sized body with varying values of iron mass fraction using inward
and outward concentric core growth to determine the resulting differences in thermal evolution and history of radial contraction. We find that the timing and absolute amount of contraction can provide constraints on the cooling history and composition of Psyche.
These differences in radial contraction could be measured by the Psyche spacecraft upon its arrival.</span></span></span></font></div>
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<div class=""><strong class="" style="caret-color: rgb(101, 101, 101); color: rgb(101, 101, 101); font-family: Arial, "Helvetica Neue", Helvetica, sans-serif; font-size: 16px;"><strong class="">Meeting with the Speaker: </strong></strong><font color="#656565" face="Arial, Helvetica Neue, Helvetica, sans-serif" size="3" class="">Fiona
will be visiting the department on Tuesday and is available to meet people individually; please sign up here: </font></div>
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<div class=""><span style="font-size: 14px; color: rgb(101, 101, 101); font-family: Arial;" class="">Code to get into the Zoom meetings
</span><i class="" style="font-size: 14px; color: rgb(101, 101, 101); font-family: Arial;"><b class="">54915</b></i></div>
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