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Harry Stephenson

@hmostevo.bsky.social
37 followers 22 following 14 posts

Astrophysics PhD Student at Lancaster University

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John Stott @jpsastro.bsky.social · 11/09/2025
New JWST paper from Lancaster’s @hmostevo.bsky.social 🧪🔭 #extragalactic
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Harry Stephenson @hmostevo.bsky.social · 11/09/2025
Hello everyone! My first Bluesky posts! I am very pleased to share that my 3rd first-author paper of my PhD is now available on arXiv! The paper has also been submitted to MNRAS following minor suggested revisions from the anonymous referee! arxiv.org/abs/2509.08045 Thread on the details 🧵
arxiv.org
The \emph{JWST} Emission Line Survey (JELS): The sizes and merger fraction of star-forming galaxies during the Epoch of Reionization
We used observations from the \emph{JWST} Emission Line Survey (JELS) to measure the half-light radii ($r_{e}$) of 23 H$α$-emitting star-forming (SF) galaxies at $z=6.1$ in the PRIMER/COSMOS field. Ga...
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