arxiv:2503.15310

Euclid Quick Data Release (Q1): First visual morphology catalogue

Published on Mar 19

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Abstract

A visual morphology catalogue for Euclid's Q1 includes detailed features of bright and extended galaxies using a fine-tuned Zooniverse model.

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We present a detailed visual morphology catalogue for Euclid's Quick Release 1 (Q1). Our catalogue includes galaxy features such as bars, spiral arms, and ongoing mergers, for the 378000 bright (IE < 20.5) or extended (area geq 700,pixels) galaxies in Q1. The catalogue was created by finetuning the Zoobot galaxy foundation models on annotations from an intensive one month campaign by Galaxy Zoo volunteers. Our measurements are fully automated and hence fully scaleable. This catalogue is the first 0.4% of the approximately 100 million galaxies where Euclid will ultimately resolve detailed morphology.

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