[Astro] Seminars this week: Jamboree!

[Jesse Golden-Marx (staff)]

Hi Everyone,
      I hope that you are all doing well.  This week, we will be having our department Jamboree!  This is our yearly tradition of getting to know everyone in the department.


In keeping with tradition, the idea is to let people know a bit about you and your research, so please send me two slides (in one single file, saved as <firstname>_ <lastname>.pdf) with:

 - slide 1: pictures that tell us something about you, not your work (don’t put your name on it) — Also don't include photos of yourself — but do make it fun!
 - slide 2: a brief research summary (put your name on it)



Please send me (Jesse) the photos by Tuesday (October 7th).  As of now, I only have slides from 8 people, so please do send them soon.  Everyone will have ~1 minute to present.  Looking forward to having all of you participate (also if you are unable to attend, please still send slides, just let me know that you can't attend in the e-mail, that way everyone can still get to know you!).


Also, on Tuesdays, October 7th and October 14th, at 13:00 in A113, there will be join Astro-Particle seminars.  This week's seminar is from William Giare (Sheffield).  The title and abstract are provided below.


Cheers,

Jesse, Tutku, and Luke



Title: Lost Beyond ΛCDM



Abstract:

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.




In peace,

Jesse


Jesse Golden-Marx, Ph.D.
Senior Research Associate

Centre for Astronomy & Particle Theory
School of Physics & Astronomy
University of Nottingham
University Park, Nottingham, UK
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