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Gentle reminder of this today at 1pm.</div>
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Joe</div>
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<div id="divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" style="font-size:11pt" color="#000000"><b>From:</b> Joseph Butler <Joseph.Butler@nottingham.ac.uk><br>
<b>Sent:</b> Monday, December 8, 2025 3:03:54 AM<br>
<b>To:</b> astro@nottingham.ac.uk <astro@nottingham.ac.uk><br>
<b>Subject:</b> Lunch Talk - 11/12/25</font>
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<div dir="auto">Hi all,</div>
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<div dir="auto">Our final lunch talk of the term will take place at the usual time of 1pm on Thursday 11th December in A113. Our speaker will be Callum Bellhouse - title and abstract below.</div>
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<div dir="auto"><span style="color:rgb(0,0,0)"><b>Title:</b> Morpho-Kinematic Decomposition of Intracluster Light with MUSE</span><br>
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<span style="color:rgb(0,0,0)"><b>Abstract: </b>The Intracluster Light (ICL) is a diffuse component which contributes a substantial yet poorly constrained portion (5-25%) of a cluster's stellar population. ICL is tightly linked to the hierarchical evolution
of galaxy clusters and is a possible luminous tracer of the dark matter halo's profile, tracing the same gravitational potential. One of the biggest challenges in ICL observations is decomposing the ICL from the Brightest Cluster Galaxy (BCG), which is impossible
using photometry alone without making significant assumptions about the relative profiles.</span><br>
<span style="color:rgb(0,0,0)">I will present a pilot project which incorporates MUSE integral-field spectroscopy and HST imaging to carry out morpho-kinematic decomposition of the ICL and BCG in AS1063, measuring spatially-resolved kinematics and spectral
properties of the BCG and ICL out to >100kpc from the cluster centre, and comparing with the phase-space and mass distribution of cluster galaxies to test the utility of the ICL as a dark matter tracer. Multicomponent decomposition of the ICL and BCG will
allow us to drastically improve our understanding of the transition region between the BCG and ICL, to constrain the relative contribution of the BCG and ICL with unprecedented precision, and to determine the utility of ICL as a luminous tracer of dark matter.</span></div>
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<div dir="auto" style="color:rgb(0,0,0)">Thanks,</div>
<div dir="auto" style="color:rgb(0,0,0)">Joe</div>
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