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<font face="Calibri,Helvetica,sans-serif,EmojiFont,Apple Color Emoji,Segoe UI Emoji,NotoColorEmoji,Segoe UI Symbol,Android Emoji,EmojiSymbols" 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: 14px;">Dear
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<div style="margin-top: 0px; margin-bottom: 0px;"><font face="wf_segoe-ui_normal,Segoe UI,Segoe WP,Tahoma,Arial,sans-serif,serif,EmojiFont" size="2" color="#212121"><span style="font-size: 14px;">our first EO meeting of 2019 will be this Thursday </span></font><font face="wf_segoe-ui_normal,Segoe UI,Segoe WP,Tahoma,Arial,sans-serif,serif,EmojiFont" size="2" color="#212121"><span style="font-size: 14px;"><b>Feb
7 from </b><b>13:15 to 14:00</b><span style="font-family: Arial, Helvetica, sans-serif;">
</span><span style="font-family: Arial, Helvetica, sans-serif;">(</span></span></font><font face="wf_segoe-ui_normal,Segoe UI,Segoe WP,Tahoma,Arial,sans-serif,serif,EmojiFont" size="2" color="#212121"><span style="font-size: 14px;">KTH meeting room on the 5th
floor). </span></font></div>
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<div style="margin-top: 0px; margin-bottom: 0px;"><font face="wf_segoe-ui_normal,Segoe UI,Segoe WP,Tahoma,Arial,sans-serif,serif,EmojiFont" size="2" color="#212121"><span style="font-size: 14px;"><b>Joonas Nättilä</b></span></font><font face="wf_segoe-ui_normal,Segoe UI,Segoe WP,Tahoma,Arial,sans-serif,serif,EmojiFont" size="2" color="#212121"><span style="font-size: 14px;"> will </span></font><font face="wf_segoe-ui_normal,Segoe UI,Segoe WP,Tahoma,Arial,sans-serif,serif,EmojiFont" size="2" color="#212121"><span style="font-size: 14px;">give</span></font><font face="wf_segoe-ui_normal,Segoe UI,Segoe WP,Tahoma,Arial,sans-serif,serif,EmojiFont" size="2" color="#212121"><span style="font-size: 14px;"> </span></font><font face="wf_segoe-ui_normal,Segoe UI,Segoe WP,Tahoma,Arial,sans-serif,serif,EmojiFont" size="2" color="#212121"><span style="font-size: 14px;">the
following talk:</span></font><br>
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<div><font size="2"><span style="font-size: 15px;">Title: Magnetically-dominated collisionless plasma flows in neutron star atmospheres</span></font></div>
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<div><font size="2"><span style="font-size: 15px;">Abstract: I will discuss collisionless plasma instabilities operating on magnetically-dominated flows in neutron star atmospheres. We define a criteria for out-of-resonance two-stream instability to be operational
in the stratified atmosphere. Our theoretical findings are then confirmed with high-resolution, first-principles relativistic Vlasov-Maxwell simulations. This allows us to study the subsequent non-linear turbulent evolution of the system. We find a new plasma
mechanism that reprocesses the incoming mildly-relativistic beams: The incoming beams are slowed down, heated up, but not brought to full halt either. Ultra-relativistic beams are still capable of penetrating into the star unaffected. This implies that diluted
free-falling accretion flows into neutron stars are always reprocessed in the uppermost layers of the star's atmosphere before entering the particle-collision-dominated layers below. This beam-atmosphere interaction is also responsible of heating the corona.
The reprocessing of the beam leads to a turbulent atmospheric layer where outward moving double layers are being excited. These uprising particle-acceleration sites are similar to earthly auroras, and are a possible new source of non-thermal X-ray radiation
from neutron stars.</span></font></div>
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<div><font face="wf_segoe-ui_normal,Segoe UI,Segoe WP,Tahoma,Arial,sans-serif,serif,EmojiFont" size="2" color="#212121"><span style="font-size: 14px;"><font face="Calibri,Helvetica,sans-serif,EmojiFont,Apple Color Emoji,Segoe UI Emoji,NotoColorEmoji,Segoe UI Symbol,Android Emoji,EmojiSymbols" size="3" color="black"><span style="font-size: 12pt;">See
you there! </span></font></span></font></div>
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<p style="font-size:16px; font-family:Calibri,Helvetica,sans-serif">---------------------------------</p>
<p style="font-size:16px; font-family:Calibri,Helvetica,sans-serif">André da Silva Schneider<br>
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<p style="font-size:16px; font-family:Calibri,Helvetica,sans-serif"><span style="font-size:10pt; font-family:Calibri,Helvetica,sans-serif,serif,EmojiFont">Department of Astronomy</span><br>
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<p style="font-size:16px; font-family:Calibri,Helvetica,sans-serif"><span style="font-family:Calibri,Helvetica,sans-serif,serif,EmojiFont"><span style="font-size:10pt">Stockholm University</span></span></p>
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