On the Connection Between Shape and Stellar Population in Early-type Galaxies

M. D'Onofrio..[et al.]; T. Valentinuzzi; G. Fasano; Per Kjærgaard Rasmussen

doi:10.1088/2041-8205/727/1/L6

On the Connection Between Shape and Stellar Population in Early-type Galaxies

M. D'Onofrio..[et al.], T. Valentinuzzi, G. Fasano, Per Kjærgaard Rasmussen

10 Citations (Scopus)

Abstract

We report on the discovery of a relation between the stellar mass M ^* of early-type galaxies (hereafter ETGs), their shape, as parameterized by the Sersic index n, and their stellar mass-to-light ratio M^*/L. In a three-dimensional log space defined by these variables, the ETGs populate a plane surface with small scatter. This relation tells us that galaxy shape and stellar population are not independent physical variables, a result that must be accounted for by theories of galaxy formation and evolution.

Original language	English
Journal	The Astrophysical Journal Letters
Volume	727
Issue number	1
Pages (from-to)	L6
ISSN	2041-8205
DOIs	https://doi.org/10.1088/2041-8205/727/1/L6
Publication status	Published - 20 Jan 2011

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10.1088/2041-8205/727/1/L6

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AB - We report on the discovery of a relation between the stellar mass M * of early-type galaxies (hereafter ETGs), their shape, as parameterized by the Sersic index n, and their stellar mass-to-light ratio M*/L. In a three-dimensional log space defined by these variables, the ETGs populate a plane surface with small scatter. This relation tells us that galaxy shape and stellar population are not independent physical variables, a result that must be accounted for by theories of galaxy formation and evolution.

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On the Connection Between Shape and Stellar Population in Early-type Galaxies

Abstract

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