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Cited by 379

The DOI matches its Crossref record; 88 of the 88 references it cites were found in a registry or an index.

Ages and metallicities of early-type galaxies in the Sloan Digital Sky Survey: new insight into the physical origin of the colour-magnitude and the Mg2-σV relations

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Gallazzi, Anna, Charlot, Stéphane, Brinchmann, Jarle, White, Simon D. M.·2006·Monthly Notices of the Royal Astronomical Society
DOI 10.1111/j.1365-2966.2006.10548.x
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Abstract

We exploit recent constraints on the ages and metallicities of early-type galaxies in the Sloan Digital Sky Survey (SDSS) to gain new insight into the physical origin of two fundamental relations obeyed by these galaxies: the colour–magnitude and the Mg2–σV relations. Our sample consists of 26 003 galaxies selected from the SDSS Data Release 2 (DR2) on the basis of their concentrated light profiles, for which we have previously derived median-likelihood estimates of stellar metallicity, light-weighted age and stellar mass. Our analysis provides the most unambiguous demonstration to date of the fact that both the colour–magnitude and the Mg2–σV relations are primarily sequences in stellar mass and that total stellar metallicity, α-elements-to-iron abundance ratio and light-weighted age all increase with mass along the two relations. For high-mass ellipticals, the dispersion in age is small and consistent with the error. At the low-mass end, there is a tail towards younger ages, which dominates the scatter in colour and index strength at fixed mass. A small, but detectable, intrinsic scatter in the mass–metallicity relation also contributes to the scatter in the two observational scaling relations, even at high masses. Our results suggest that the chemical composition of an early-type galaxy is more tightly related to its dynamical mass (including stars and dark matter) than to its stellar mass. The ratio between stellar mass and dynamical mass appears to decrease from the least massive to the most massive galaxies in our sample.

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Metadata

Authors
Gallazzi, A., Charlot, S., Brinchmann, J., & White, S. D. M.
Venue
Monthly Notices of the Royal Astronomical Society
Publisher
Oxford University Press (OUP)
Published
2006-06-15
Volume
370
Issue
3
Pages
1106-1124
ISSN
0035-8711 (ISSN-L)
DOI
10.1111/j.1365-2966.2006.10548.x
OpenAlex
W2125835283
Cited by
379
References
88
FWCI
18.13
Type
journal article
Language
en
Open access
green

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CoChat. (2026). Citation check: Ages and metallicities of early-type galaxies in the Sloan Digital Sky Survey: new insight into the physical origin of the colour-magnitude and the Mg2-σV relations. https://app.cochat.ai/papers/10.1111/j.1365-2966.2006.10548.x
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Gallazzi, A., Charlot, S., Brinchmann, J., & White, S. D. M. (2006). Ages and metallicities of early-type galaxies in the Sloan Digital Sky Survey: new insight into the physical origin of the colour-magnitude and the Mg2-σV relations. Monthly Notices of the Royal Astronomical Society. https://doi.org/10.1111/j.1365-2966.2006.10548.x

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