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<p class="elementtoproof" style="background:white"><b><span style="font-size:16.0pt;color:black">Monday 6<sup>th</sup> October at 3pm, A113 CAPT – Theoretical Physics Student Seminar<o:p></o:p></span></b></p>
<p class="xmsonormal"><span style="font-size:16.0pt;font-family:"Aptos",sans-serif">Trevor Cheung<o:p></o:p></span></p>
<p class="elementtoproof" style="background:white"><span style="font-size:14.0pt;color:black;mso-fareast-language:EN-US">Are the Feynman rules you learnt still correct?</span><b><span style="font-size:16.0pt;color:black"><o:p></o:p></span></b></p>
<p class="elementtoproof" style="background:white"><b><span style="font-size:16.0pt;color:black"><o:p> </o:p></span></b></p>
<p class="elementtoproof" style="background:white"><b><span style="font-size:16.0pt;color:black">Tuesdays at 11am, CAPT Foyer – Astro Coffee<o:p></o:p></span></b></p>
<p class="elementtoproof" style="background:white"><b><span style="font-size:16.0pt;color:black"><o:p> </o:p></span></b></p>
<p class="elementtoproof" style="background:white"><b><span style="font-size:16.0pt;color:black">Tuesday 7<sup>th</sup> October at 1pm, A113 CAPT – Particle Cosmology and Gravity Seminar<o:p></o:p></span></b></p>
<p class="xmsonormal"><span style="font-size:16.0pt;font-family:"Aptos",sans-serif">William Giarè (Sheffield)<o:p></o:p></span></p>
<p class="xmsonormal"><span style="font-size:14.0pt;font-family:"Aptos",sans-serif;color:black;mso-fareast-language:EN-US">Lost Beyond ΛCDM<o:p></o:p></span></p>
<p class="xmsonormal"><span style="font-size:14.0pt;font-family:"Aptos",sans-serif;color:black;mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:black">As cosmological observations reach unprecedented precision, the standard ΛCDM model is facing mounting pressure on multiple fronts. The well-known Hubble tension — a persistent discrepancy between early- and late-universe
determinations of the Hubble constant — challenges the foundations of our baseline paradigm. At the same time, recent Baryon Acoustic Oscillation measurements from DESI suggest bounds on the sum of neutrino masses that increasingly conflict with lower limits
from particle physics, assuming standard cosmology. Extensions to the dark energy sector, particularly evolving dark energy models, can alleviate the neutrino mass tension and even appear to disfavor a cosmological constant at ~3-4σ. Yet these scenarios generally
fail to address the Hubble tension. Conversely, both early- and late-time solutions proposed for the Hubble tension often drive the neutrino mass toward unrealistically small values, worsening the conflict with particle physics. This raises a natural question:
is a coherent framework capable of reconciling all datasets still within reach, or is the cosmological blanket simply too short, such that pulling to cover one discrepancy inevitably leaves another exposed? In this talk, I will explore the web of tensions
currently plaguing modern cosmology, and outline possible pathways into the beyond-ΛCDM landscape.</span><span style="color:black"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:black"><o:p> </o:p></span></p>
<p class="MsoNormal" style="background:white"><b><span style="font-size:11.5pt;color:black">Link to join:</span></b><span style="font-size:11.5pt;color:black"> <a href="https://teams.microsoft.com/l/meetup-join/19%3ameeting_OGM3OTk5NzQtZWEwZS00ZmUyLTk3MGUtZjFhY2M5OTU2MjI1%40thread.v2/0?context=%7b%22Tid%22%3a%2267bda7ee-fd80-41ef-ac91-358418290a1e%22%2c%22Oid%22%3a%22f3250584-4b5f-48fa-a897-08e77f2246b7%22%7d" target="_blank" title="https://teams.microsoft.com/l/meetup-join/19%3ameeting_OGM3OTk5NzQtZWEwZS00ZmUyLTk3MGUtZjFhY2M5OTU2MjI1%40thread.v2/0?context=%7b%22Tid%22%3a%2267bda7ee-fd80-41ef-ac91-358418290a1e%22%2c%22Oid%22%3a%22f3250584-4b5f-48fa-a897-08e77f2246b7%22%7d">https://teams.microsoft.com/l/meetup-join/19%3ameeting_OGM3OTk5NzQtZWEwZS00ZmUyLTk3MGUtZjFhY2M5OTU2MjI1%40thread.v2/0?context=%7b%22Tid%22%3a%2267bda7ee-fd80-41ef-ac91-358418290a1e%22%2c%22Oid%22%3a%22f3250584-4b5f-48fa-a897-08e77f2246b7%22%7d</a><o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:black"><br>
</span><span style="font-size:16.0pt;color:black">---</span><span style="color:black"><o:p></o:p></span></p>
<p class="xmsonormal"><b><span style="font-size:16.0pt;font-family:"Aptos",sans-serif">Wednesday 8<sup>th</sup> October at 11am, A113 CAPT – CAPT Coding Club<o:p></o:p></span></b></p>
<p class="elementtoproof" style="background:white"><b><span style="font-size:16.0pt"><o:p> </o:p></span></b></p>
<p class="xmsonormal"><b><span style="font-size:16.0pt;font-family:"Aptos",sans-serif">Wednesday 8<sup>th</sup> October at 3.45pm, A113 CAPT – Astronomy Weekly Seminar<o:p></o:p></span></b></p>
<p class="MsoNormal" style="background:white"><span style="font-size:14.0pt;color:black">Departmental Jamboree<o:p></o:p></span></p>
<p class="xmsonormal"><i><span style="font-size:12.0pt;font-family:"Aptos Display",sans-serif;color:black"><o:p> </o:p></span></i></p>
<p class="xmsonormal"><span style="font-size:16.0pt;font-family:"Aptos",sans-serif">---<o:p></o:p></span></p>
<p class="xmsonormal"><b><span style="font-size:16.0pt;font-family:"Aptos",sans-serif">Thursday 9<sup>th</sup> October at 1pm, A113 CAPT – Astronomy Lunch Talk<o:p></o:p></span></b></p>
<p class="xmsonormal"><span style="font-size:16.0pt;font-family:"Aptos",sans-serif">Jesse Golden-Marx<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:14.0pt;color:black">The Metallicity of the ICL: A Euclid Q1 Story<br>
<br>
<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.5pt;color:black">Colour provides key information for constraining the stellar population of the intracluster light (ICL), the diffuse light within galaxy clusters. Using the Euclid Q1 photometry for 174 DES-redMaPPer
galaxy clusters (within the Q1 footprint) over the redshift range 0.1 < z < 0.75, we derive radial colour profiles of the brightest central galaxy (BCG) and ICL. Using elliptical annuli, we detect a colour gradient, such that the ICL is bluer than the BCG.
By stacking these profiles, we can extend this gradient out to 600kpc. Using stellar population synthesis models, we find that near infrared colours are sensitive to metallicity, not age. Thus, we measure a metallicity gradient in the BCG+ICL out to 600kpc
for the first time. We find that the metallicity of the BCG, which moderately evolves with redshift, is super-solar [log10 (Z/Zsun) > 0.2], while the ICL is metal-poor [log10(Z/Zsun)\sim -0.5 to -1.0], placing the first statistical constraint on the metallicity
of the ICL as a population out to large radii. These results support our current understanding of BCG and ICL formation: BCGs form predominantly through mergers with massive galaxies or the cores of satellite galaxies, while the ICL grows via the tidal stripping
of lower metallicity stars from the outskirts of massive satellite galaxies.</span><span style="color:black"><o:p></o:p></span></p>
<p class="xmsonormal"><span style="font-size:16.0pt;font-family:"Aptos",sans-serif"><o:p> </o:p></span></p>
<p class="xmsonormal"><b><span style="font-size:16.0pt;font-family:"Aptos",sans-serif">Thursday 9<sup>th</sup> October at 3pm, A113 CAPT – Particle Cosmology Journal Club<o:p></o:p></span></b></p>
<p class="MsoNormal"><span style="font-size:16.0pt">---</span><span style="mso-ligatures:none;mso-fareast-language:EN-GB"><o:p></o:p></span></p>
<p class="MsoNormal"><b><span style="font-size:16.0pt">Fridays at 4pm, CAPT Foyer – CAPT Cakes<o:p></o:p></span></b></p>
<p class="MsoNormal">---<o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:12.0pt">If you have any events/visitors you would like included in next week’s bulletin, please let me know.</span><o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-GB">Best wishes<span style="mso-ligatures:none"><o:p></o:p></span></span></p>
<p class="MsoNormal"><span style="font-size:6.0pt;mso-fareast-language:EN-GB"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif;mso-fareast-language:EN-GB">Ella<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:6.0pt;font-family:"Calibri",sans-serif;mso-fareast-language:EN-GB"><o:p> </o:p></span></p>
<p class="MsoNormal"><b><span style="font-family:"Arial",sans-serif;color:#009BBD;mso-fareast-language:EN-GB">Ella Batchelor
</span></b><span style="font-family:"Arial",sans-serif;color:#009BBD;mso-fareast-language:EN-GB">(she/her)</span><o:p></o:p></p>
<p class="MsoNormal"><b><span lang="EN-US" style="font-family:"Arial",sans-serif;color:#0F1245;mso-fareast-language:EN-GB">Administrator</span></b><span style="mso-fareast-language:EN-GB"><o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span lang="EN-US" style="font-family:"Arial",sans-serif;color:#0F1245;mso-fareast-language:EN-GB"><o:p> </o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span lang="EN-US" style="font-size:9.0pt;font-family:"Arial",sans-serif;color:#0F1245;mso-fareast-language:EN-GB">School of Physics & Astronomy</span><span lang="ZH-CN" style="font-size:9.0pt;font-family:"MS Gothic";color:#0F1245;mso-fareast-language:ZH-CN">
</span><span lang="EN-US" style="font-size:9.0pt;font-family:"MS Mincho";color:#0F1245;mso-fareast-language:EN-GB"><o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span lang="EN-US" style="font-size:9.0pt;font-family:"Arial",sans-serif;color:#0F1245;mso-fareast-language:EN-GB">University of Nottingham</span><span lang="EN-US" style="font-size:9.0pt;font-family:"Calibri",sans-serif;mso-fareast-language:EN-GB"><o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span lang="EN-US" style="font-size:9.0pt;font-family:"Arial",sans-serif;color:#0F1245;mso-fareast-language:EN-GB">A112a Centre for Astronomy & Particle Theory</span><span lang="EN-US" style="font-size:9.0pt;mso-fareast-language:EN-GB"><o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span lang="EN-US" style="font-size:9.0pt;font-family:"Arial",sans-serif;color:#0F1245;mso-fareast-language:EN-GB">University Park</span><span lang="EN-US" style="font-size:9.0pt;mso-fareast-language:EN-GB"><o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span lang="EN-US" style="font-size:9.0pt;font-family:"Arial",sans-serif;color:#0F1245;mso-fareast-language:EN-GB">Nottingham, NG7 2RD</span><span lang="EN-US" style="font-size:9.0pt;mso-fareast-language:EN-GB"><o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span lang="EN-US" style="font-size:9.0pt;mso-fareast-language:EN-GB"> <o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span lang="EN-US" style="font-size:9.0pt;font-family:"Arial",sans-serif;color:#0F1245;mso-fareast-language:EN-GB">+44 (0) 115 74 86778<b> </b></span><b><span lang="EN-US" style="font-size:9.0pt;color:#0F1245;mso-fareast-language:EN-GB">| </span></b><b><span lang="EN-US" style="font-size:9.0pt;font-family:"Arial",sans-serif;color:#0F1245;mso-fareast-language:EN-GB">
</span></b><span style="mso-fareast-language:EN-GB"><a href="http://nottingham.ac.uk/"><span lang="EN-US" style="font-size:9.0pt;font-family:"Arial",sans-serif;color:blue">nottingham.ac.uk</span></a><o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="mso-fareast-language:EN-GB"><o:p> </o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="mso-fareast-language:EN-GB"><img border="0" width="484" height="109" style="width:5.0416in;height:1.1354in" id="Picture_x0020_2042549853" src="cid:image001.png@01DC369A.F50AC720"></span><span lang="EN-US" style="font-size:9.0pt;mso-fareast-language:EN-GB"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:9.0pt;font-family:"Arial",sans-serif;color:black;mso-fareast-language:EN-GB"><o:p> </o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><b><span lang="EN-US" style="font-size:9.0pt;font-family:"Georgia",serif;color:#15769E;mso-fareast-language:EN-GB">Follow us</span></b><span lang="EN-US" style="font-size:9.0pt;color:#191919;mso-fareast-language:EN-GB"><br>
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