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X-WR-CALNAME;VALUE=TEXT:ITC Seminar - David Hernandez (CfA)
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SUMMARY:ITC Seminar - David Hernandez (CfA)
DESCRIPTION:<p style="margin:0px;text-align:start;-webkit-text-stroke-width:0px">	<span><span style="color:#222222"><span style="Helvetica,sans-serif"><span style="font-style:normal"><span style="font-variant-ligatures:normal"><span style="font-variant-caps:normal"><span style="font-weight:400"><span style="letter-spacing:normal"><span style="orphans:2"><span style="text-transform:none"><span style="white-space:normal"><span style="widows:2"><span style="word-spacing:0px"><span style="background-color:#ffffff"><span style="text-decoration-style:initial"><span style="text-decoration-color:initial"><span style="serif"><span style="color:black">Are long-term N-body simulations reliable?</span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></p><p style="margin:0px;text-align:start;-webkit-text-stroke-width:0px">	 </p><p style="margin:0px;text-align:start;-webkit-text-stroke-width:0px">	<span><span style="color:#222222"><span style="Helvetica,sans-serif"><span style="font-style:normal"><span style="font-variant-ligatures:normal"><span style="font-variant-caps:normal"><span style="font-weight:400"><span style="letter-spacing:normal"><span style="orphans:2"><span style="text-transform:none"><span style="white-space:normal"><span style="widows:2"><span style="word-spacing:0px"><span style="background-color:#ffffff"><span style="text-decoration-style:initial"><span style="text-decoration-color:initial"><span style="serif"><span style="color:black">Abstract: Astrophysicists rely on solution for the N-body problem for a myriad of dynamics problems, from those in dark matter dynamics to those in planetary dynamics.  Over 50 years ago, Miller found that errors in our simulations of the N-body problem grow exponentially in time.  So why should one trust any such simulation over long times?  In this talk, I explore a three-body planetary system.  The motion over long times can be compared to recent results from Hadden &amp; Lithwich (2018).  I find conventional integration methods are as accurate as more sophisticated symplectic methods.  In fact, a higher order symplectic method gave unreliable statistics in one test.</span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></p>
LOCATION:Phillips
STATUS:CONFIRMED
DTSTART:20200210T170000Z
DTEND:20200210T180000Z
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