Résumé / Abstract Journal-club_Galaxies

Journal-club Galaxies

« Exploring the red sequence, blue cloud, and green valley of nearby galaxies using morphology »

Louis Quilley
Institut d'Astrophysique de Paris (Paris, France)

Color-magnitude diagrams show a bimodality between the red passive galaxies and the blue star-forming ones. In between the Red Sequence and the Blue Cloud lies the Green Valley, a low density area of intermediate-color galaxies which has raised questions about the evolutionnary pathways of galaxies. By doing luminosity profile-fitting, I recreate those diagrams for nearby galaxies in the northern galactic cap. Using data from the EFIGI morphological catalog, I focus on the distribution of the different Hubble types in those diagrams, and complement them with quantitative parameters, such as bulge-to-total ratio, stellar mass or specific star formation rate. The observed trends provide insight on the evolution of galaxies and the build-up of the Hubble Sequence.
jeudi 16 décembre 2021 - 11:30
Salle des séminaires Évry Schatzman, Institut d'Astrophysique
Pages web du journal-club / Journal-club's webpage