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    <title>Research | Katherine Ormerod</title>
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            <a href="index.html" class="site-title">Katherine Ormerod</a>
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                    <h2>My Projects</h2>
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                    <div class="project project-with-image">
                        <img src="GNWY_UV_Bump.png" alt="2175Å UV bump illustration" class="project-image">
                        <div class="project-text">
                            <h4>The 2175Å UV Bump at High Redshift</h4>
                            <p>
                                In this paper, we identified a bright galaxy at z=7.1, with a strong 2175Å UV bump
                                feature in its rest-UV spectrum, through observations taken as part of the NIRSpec
                                Wide GTO survey.
                                <br><br>
                                The presence of the UV bump feature at such early times indicates rapid evolution of
                                dust properties within the first billion years of cosmic time. To investigate the origin
                                of the dust responsible for the UV bump, we carried out resolved SED fitting, suggesting
                                that existing (large) dust grains are likely being rapidly reprocessed in the ISM,
                                producing the small carbonaceous grains responsible for the UV bump feature.
                            <a href="https://ui.adsabs.harvard.edu/abs/2025arXiv250221119O/abstract"
                            class="publication-link">Find out more →</a>
                            </p>
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                    <div class="project">
                        <h4>Emission Line Galaxies in the Epoch of Reionisation</h4>
                        <p>Studying the properties of Spitzer/IRAC excess galaxies in the Epoch of Reionisation with
                            NIRSpec spectroscopy.</p>
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                <h2>Successful Proposals</h2>
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                            <h4>Constraining Dust Formation at Cosmic Dawn with Luminous UV Bump Galaxies</h4>
                            <p class="info">PI, JWST NIRSpec IFU<br>Observing time: 19 hours</p>
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                        <div class="proposal">
                            <h4>The 2175Å UV bump as a signpost of NIRCam dark star formation</h4>
                            <p class="info">PI, NOEMA interferometer<br>Observing time: 25 hours</p>
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                        <div class="proposal">
                            <h4>Unveiling dust build up in a 'UV bump' galaxy at z=7.1 with JWST+NOEMA</h4>
                            <p class="info">Co-PI, NOEMA interferometer<br>Observing time: 16 hours</p>
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        <p>© 2026 Katherine Ormerod</p>
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