Séminaire/Seminar Galaxies |
| « Galaxy morphology with Euclid space telescope » |
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Louis Quilley |
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Almost a century after the publication of the Hubble sequence, that classifies galaxies according to their shapes and features, galaxy morphology remains a topical issue. Indeed, the structure of galaxies provides insight on how they acquire their mass, grow their stellar populations, and eventually cease their star formation. In this talk, I will discuss how the capabilities of ESA’s latest space telescope Euclid, launched in July 2023, can be leveraged to retrace the history of the Hubble sequence, and I will present the first strides made in that avenue of research. Using the first morphological analysis of galaxies observed by Euclid, within its early release observations, I will demonstrate the potential and limits of parametric fits to measure galaxy, bulge and disc sizes, shapes, colours and colour profiles. Then I will present the unprecedented morphological catalogue complementing the Q1 (and every subsequent) data release. This incredible wealth of information allows us to investigate how morphological transformations are connected to the star-formation history of galaxies, as they evolve across cosmic times and along the Cosmic Web.
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jeudi 5 juin 2025 - 11:30 Salle des séminaires Évry Schatzman Institut d'Astrophysique de Paris |
| Page web du séminaire / Seminar's webpage |