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Unvealing the growth of massive galaxies by meand of deep photometric analysis

Sandra N. Reis

Galaxies change their morphology across cosmic time. Particularly, the most massive (M* > 10¹¹ M_sun) galaxies of the Universe are regarded as early-types in the present-day, however they appear to be more disk-like at high-z (z > 1). For this transformation to take place, the core of early-type galaxies in the local Universe must contain their high-z massive and compact galaxy counterparts, according to number density arguments. To disentangle these two components we need to analyse the deepest and highest resolution images that are publicly available, both using photometry and spectroscopy. We accomplish the first part in this work by performing a double-Sérsic analysis of the lowest redshift
(z<0.5) massive galaxies, obtained from CANDELS in the h- and i-bands.
For the next step we will investigate 3D-spectroscopic MUSE data in order to determine the kinematics and stellar populations for these galaxies' different components. Joining these two studies we will characterize with unprecedented detail the observational properties of early-type galaxy centers vs their outskirts, being thus able to separate for the first time the several components that might constitute the most massive galaxies in our Universe.

2017 March 23, 15:00

Observatůrio Astronůmico de Lisboa (Seminar room)
Tapada da Ajuda, 1349-018 Lisboa

Instituto de Astrof√≠sica e Ci√™ncias do Espa√ßo Universidade do Porto Faculdade de Ciências da Universidade de Lisboa Funda√ß√£o para a Ci√™ncia e a Tecnologia
Outreach at IA