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X-WR-CALNAME;VALUE=TEXT:ITC Colloquium - Yuri Levin (Flatiron)  in Phillips
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SUMMARY:ITC Colloquium - Yuri Levin (Flatiron)  in Phillips
DESCRIPTION:<p>	 </p><div>	<span><span style="color:#222222"><span style="Helvetica,sans-serif"><span style="background-color:#ffffff">Magnetic coupling between the crust and the core of neutron stars.</span></span></span></span></div><div>	 </div><div>	<span><span style="color:#222222"><span style="Helvetica,sans-serif"><span style="background-color:#ffffff">Abstract:</span></span></span></span></div><div>	 </div><div>	<span><span style="color:#222222"><span style="Helvetica,sans-serif"><span style="background-color:#ffffff">What do magnetic fields look like inside neutron stars? We do not know; since reliable</span></span></span></span></div><div>	<span><span style="color:#222222"><span style="Helvetica,sans-serif"><span style="background-color:#ffffff">observational constraints are few, the theorists' imagination can run wild. For example,</span></span></span></span></div><div>	<span><span style="color:#222222"><span style="Helvetica,sans-serif"><span style="background-color:#ffffff">some very popular models assume that the field is confined to the crust and does not</span></span></span></span></div><div>	<span><span style="color:#222222"><span style="Helvetica,sans-serif"><span style="background-color:#ffffff">penetrate into the core at all!!</span></span></span></span></div><div>	<span><span style="color:#222222"><span style="Helvetica,sans-serif"><span style="background-color:#ffffff">In this talk I will give two insights. First comes from a spectacular magnetospheric disturbance</span></span></span></span></div><div>	<span><span style="color:#222222"><span style="Helvetica,sans-serif"><span style="background-color:#ffffff">observed recently during a glitch in Vela. I argue that the disturbance is a result of a quake, during which crustal</span></span></span></span></div><div>	<span><span style="color:#222222"><span style="Helvetica,sans-serif"><span style="background-color:#ffffff">seismic waves penetrated into the magnetosphere and the core of the pulsar. I will show evidence for</span></span></span></span></div><div>	<span><span style="color:#222222"><span style="Helvetica,sans-serif"><span style="background-color:#ffffff">a strong magnetic crust-core coupling, which points with certainty to a strong poloidal field at the </span></span></span></span></div><div>	<span><span style="color:#222222"><span style="Helvetica,sans-serif"><span style="background-color:#ffffff">crust-core interface, and indicates (with less certainty) that the magnetic stresses are strengthened</span></span></span></span></div><div>	<span><span style="color:#222222"><span style="Helvetica,sans-serif"><span style="background-color:#ffffff">by superconductivity in the core. The second insight comes from magnetar quasi-periodic oscillations. </span></span></span></span></div><div>	<span><span style="color:#222222"><span style="Helvetica,sans-serif"><span style="background-color:#ffffff">The models that included the crust-core coupling, have been predicting that many of the QPOs should</span></span></span></span></div><div>	<span><span style="color:#222222"><span style="Helvetica,sans-serif"><span style="background-color:#ffffff">be strongly transient and intermittent. Recently, these predictions have been confirmed by Miller et al.</span></span></span></span></div><p>	 </p>
LOCATION:Phillips
STATUS:CONFIRMED
DTSTART:20191107T160000Z
DTEND:20191107T170000Z
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