Katherine Ormerod

Finally got my telescope sorted after getting some new bits for it, and a nice clear night today! 🔭

Dust Ahead of Schedule: The Surprising UV Bump in a Galaxy at Cosmic Dawn What do you get when baby galaxies crash and light up in UV? A surprising early signature of cosmic dust.

From Niloofar Sharei @astroneal.bsky.social : What do you get when baby galaxies crash and light up in UV? A surprising early signature of cosmic dust. 🔭✨☄️
astrobites.org/2025/04/21/dust-ahead-of-schedule-uv-bump/

thank you!! this is really nice to hear

Proud to have been part of Katherine's first PhD paper 👏👏 Her detailed study of a distant galaxy reveals what is likely an ongoing merger in a complex system containing both young and old stellar populations with new evidence for the presence of small carbonaceous grains – read more below!

Thank you to everyone involved with this paper, in particular @renskerens.bsky.social, @joriswitstok.bsky.social, and all coauthors!

We find that this is one of the strongest known UV bumps. Studying these UV bump systems could help us constrain dust production mechanisms in the early Universe. Finally, the open symbol on this plot shows a tentative UV bump detection in another galaxy at z=6.74.

Through various morphological analyses, this galaxy is likely a minor merger, which could be driving the recent starburst

We have identified a strong 2175Å UV bump feature in a luminous Lyman break galaxy at z=7.11 in the NIRSpec Wide GTO survey. We also find an offset peak wavelength of the UV bump, with a peak wavelength of 2257Å

Detection of the 2175Å UV Bump at z>7: Evidence for Rapid Dust Evolution in a Merging Reionisation-Era Galaxy Dust is a fundamental component of the interstellar medium (ISM) within galaxies, as dust grains are highly efficient absorbers of UV and optical photons. Accurately quantifying this obscuration is cr...

It's paper day! 🔭 Very excited to share that my latest paper, and the first to come from my PhD, is on
arXiv today: arxiv.org/abs/2502.21119

The Moon tonight
🔭 Celestron Nexstar 5SE

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Exploring London 🎄

Observational Astrophysics - Lancaster University

Please see here for PhD projects at Lancaster University Astrophysics, starting October 2025. There is one with me on the subject of galaxy evolution with environment 😀🌌 🔭🧪 #extragalactic #cosmology www.lancaster.ac.uk/physics/rese...

I’m sorry for your loss Sarah

I’d like to be added!

Thank you! It’s pretty fun :)

#astronomy #extragalactic

I am a PhD student, studying the Epoch of Reionisation using JWST! I would like to find more astronomy accounts to follow and share my work with

Yes

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Spurs are awful today #wsl

(Fairly) new here, so hi, I’m Katherine, a PhD student studying galaxies in the Epoch of Reionisation with JWST 🔭

The northern lights over Rivington #aurora