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<div class=""><span class=""><font size="3" style="caret-color: rgb(101, 101, 101); font-family: Arial, "Helvetica Neue", Helvetica, sans-serif; font-size: 16px;" class="">Please join us next Tuesday, </font><font face="Arial, Helvetica Neue, Helvetica, sans-serif" size="3" class=""><span style="caret-color: rgb(101, 101, 101);" class="">November</span></font><font size="3" style="caret-color: rgb(101, 101, 101); font-family: Arial, "Helvetica Neue", Helvetica, sans-serif; font-size: 16px;" class=""> 29th
for a talk from </font></span><font face="Arial, Helvetica Neue, Helvetica, sans-serif" size="3" class=""><span style="caret-color: rgb(101, 101, 101);" class="">Fiona Nichols-Fleming (Brown University) about Core Solidification & Contraction on 16 Psyche.
Lunch will be served.</span></font></div>
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<div class=""><font face="Arial, Helvetica Neue, Helvetica, sans-serif" size="3" class=""><span style="caret-color: rgb(101, 101, 101);" class="">Details below, including a link to sign up for a time to meet individually with Fiona.</span></font></div>
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<div class=""><font face="Arial, Helvetica Neue, Helvetica, sans-serif" size="3" class=""><span style="caret-color: rgb(101, 101, 101);" class="">Best,</span></font></div>
<div class=""><font face="Arial, Helvetica Neue, Helvetica, sans-serif" size="3" class=""><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: <a href="https://docs.google.com/spreadsheets/d/11p1LK9KqCg4niIfDtDlFc_3q6IgTZSoNO_zsKdPIYUQ/edit?usp=sharing" class="">https://docs.google.com/spreadsheets/d/11p1LK9KqCg4niIfDtDlFc_3q6IgTZSoNO_zsKdPIYUQ/edit?usp=sharing</a></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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