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Hi Everyone,</div>
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Our seminar this week will be given by Giulia Lusetti, a postdoc at the Open University working with Judith Croston. As usual, the seminar will be in C4 followed by wine and cheese. The abstract and title are provided below. </div>
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The timings are:</div>
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<div class="elementToProof" role="presentation">Lunch at the Portland building (leaving CAPT ~ 13:00) — we can subsidize a few postgraduate students to join for lunch, so please let me know by tomorrow morning. </div>
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<div class="elementToProof" role="presentation">Postgrads meet with the speaker at 15:00 - 15:30</div>
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<div class="elementToProof" role="presentation">Seminar in C4 at 15:45</div>
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<div class="elementToProof" role="presentation">Wine & Cheese at 16:45</div>
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If you would like to join for lunch or meet with Giulia tomorrow, please let me know by tomorrow morning! See you all tomorrow!</div>
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Cheers,</div>
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Jesse, Luke, Tutku, & Jake</div>
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<span style="font-family: Calibri, sans-serif; font-size: 12pt; color: rgb(36, 36, 36);"><b>Title:</b></span></p>
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<span style="font-family: Calibri, sans-serif; font-size: 12pt; color: rgb(36, 36, 36);"><i>From diffuse cluster emission to compact jets: a LOFAR perspective on the life cycle of radio plasma</i></span></p>
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<span style="font-family: Calibri, sans-serif; font-size: 12pt; color: rgb(36, 36, 36);"><i> </i></span></p>
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<span style="font-family: Calibri, sans-serif; font-size: 12pt; color: rgb(36, 36, 36);"><b>Abstract:</b></span></p>
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<span style="font-family: Calibri, sans-serif; font-size: 12pt; color: rgb(36, 36, 36);">Relativistic particles and magnetic fields trace some of the most energetic processes in the Universe. In galaxy clusters—the largest gravitationally bound systems in the
universe—these components are revealed through diffuse radio emission associated with mergers and shocks, as well as through radio galaxies powered by active galactic nuclei (AGN). Traditionally, these phenomena have been studied separately; however, growing
observational evidence suggests that they are physically connected through the life cycle of relativistic plasma.</span></p>
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<span style="font-family: Calibri, sans-serif; font-size: 12pt; color: rgb(36, 36, 36);">In this seminar, I will present results on diffuse radio emission and radio galaxies in cluster environment and discuss how AGN activity may provide a seed population of
relativistic electrons that is later re-accelerated by cluster-scale processes. All of this is viewed through the unique lens of LOFAR, whose combination of very low-frequency coverage and high sensitivity is revealing previously “hidden” radio sky phenomena.
Being a European-based array, LOFAR has recently demonstrated its strength not only in probing faint, diffuse emission, but also in reaching sub-arcsecond resolution through very long baseline interferometry (VLBI). In the second part of the talk, I will showcase
how these capabilities can be used to study galaxy-scale jet sources out to redshift 3 and beyond. Thanks to VLBI, it is now possible to resolve (<100 kpc) structures that were previously unresolved in standard LOFAR observations, enabling detailed studies
of their interplay with their host galaxies.</span></p>
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<b>Jesse Golden-Marx, Ph.D.</b></div>
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<b>Senior Research Associate</b></div>
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Centre for Astronomy & Particle Theory</div>
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School of Physics & Astronomy</div>
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University of Nottingham</div>
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University Park, Nottingham, UK</div>
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