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• W1794361018 startingPage "3730" @default.
• W1794361018 abstract "[abridged] We explore the diversity of internal galaxy structures in the Coma cluster across a wide range of luminosities ($-17$,$>$,$M_g$,$>$,$-22$) and cluster-centric radii ($0$,$<$,$r_{rm{cluster}}$,$<$,1.3 $r_{200}$) through analysis of deep Canada-France-Hawaii Telescope $i$ band imaging. We present 2D multi-component decomposition via GALFIT, encompassing a wide range of candidate model morphologies with up to three photometric components. Particular focus is placed on early-type galaxies with outer discs (i.e. S0s), and deviations from simple (`unbroken') exponential discs. Rigorous filtering ensures that each model component provides a statistically significant improvement to the goodness-of-fit. The majority of Coma cluster members in our sample (478 of 631) are reliably fitted by symmetric structural models. Of these, 134 ($28%$) are single S'{e}rsic objects, 143 ($30%$) are well-described by 2 component structures, while 201 ($42%$) require more complex models. Multi-component S'{e}rsic galaxies resemble compact psuedobulges ($nsim$,2, $R_e sim$, 4 kpc) surrounded by extended Gaussian-like outer structures ($R_e > 10$ kpc). 11% of galaxies ($N=52$) feature a break in their outer profiles, indicating `truncated' or `anti-truncated' discs. Beyond the break radius, truncated galaxies are structurally consistent with exponential discs, disfavouring physical truncation as their formation mechanism. Bulge luminosity in anti-truncated galaxies correlates strongly with galaxy luminosity, indicating a bulge-enhancing origin for these systems. Both types of broken disc are found overwhelmingly ($>70%$) in `barred' galaxies, despite a low measured bar fraction for Coma ($20pm2%$). Thus, galaxy bars play an important role in formation of broken disc structures. No strong variation in galaxy structure is detected with projected cluster-centric radius." @default.
• W1794361018 created "2016-06-24" @default.
• W1794361018 creator A5002086021 @default.
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• W1794361018 date "2015-09-09" @default.
• W1794361018 modified "2023-10-14" @default.
• W1794361018 title "Beyond Sérsic + exponential disc morphologies in the Coma Cluster" @default.
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• W1794361018 doi "https://doi.org/10.1093/mnras/stv1662" @default.
• W1794361018 hasPublicationYear "2015" @default.
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