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The SAMI Galaxy Survey: Gravitational Potential and Surface Density Drive Stellar Populations. I. Early-type Galaxies

Barone, Tania; D'Eugenio, Francesco; Colless, Matthew; Scott, Nicholas; van de Sande, J; Bland-Hawthorn, Joss; Brough, Sarah; Bryant, J.; Cortese, L; Croom, Scott M; Foster, Caroline; Goodwin, Michael; Konstantopoulos, I S; Lawrence, J; Lorente, N.P.F.; Medling, Anne

Description

The well-established correlations between the mass of a galaxy and the properties of its stars are considered to be evidence for mass driving the evolution of the stellar population (SP). However, for early-type galaxies (ETGs), we find that g - i color and stellar metallicity [Z/H] correlate more strongly with gravitational potential Φ than with mass M, whereas SP age correlates best with surface density Σ. Specifically, for our sample of 625 ETGs with integral-field spectroscopy from the...[Show more]

CollectionsANU Research Publications
Date published: 2018
Type: Journal article
URI: http://hdl.handle.net/1885/164038
Source: The Astrophysical Journal
DOI: 10.3847/1538-4357/aaaf6e

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