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Abundance ratios in hierarchical galaxy formation

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Abundance ratios in hierarchical galaxy formation. / Thomas, D.

In: Monthly Notices of the Royal Astronomical Society, Vol. 306, No. 3, 01.07.1999, p. 655-661.

Research output: Contribution to journalArticlepeer-review

Harvard

Thomas, D 1999, 'Abundance ratios in hierarchical galaxy formation', Monthly Notices of the Royal Astronomical Society, vol. 306, no. 3, pp. 655-661. https://doi.org/10.1046/j.1365-8711.1999.02552.x

APA

Thomas, D. (1999). Abundance ratios in hierarchical galaxy formation. Monthly Notices of the Royal Astronomical Society, 306(3), 655-661. https://doi.org/10.1046/j.1365-8711.1999.02552.x

Vancouver

Thomas D. Abundance ratios in hierarchical galaxy formation. Monthly Notices of the Royal Astronomical Society. 1999 Jul 1;306(3):655-661. https://doi.org/10.1046/j.1365-8711.1999.02552.x

Author

Thomas, D. / Abundance ratios in hierarchical galaxy formation. In: Monthly Notices of the Royal Astronomical Society. 1999 ; Vol. 306, No. 3. pp. 655-661.

Bibtex

@article{1fbcc82fd03b4f41b17b8334beb7cf37,
title = "Abundance ratios in hierarchical galaxy formation",
abstract = "The chemical enrichment and stellar abundance ratios of galaxies that form in a hierarchical clustering scheme are calculated. For this purpose, I adopt the star formation histories (SFH) as they are delivered by semi-analytic models by Kauffmann. It turns out that the average SFH of cluster ellipticals does not yield globally a-enhanced stellar populations. The starburst that occurs when the elliptical forms in the major merger therefore plays a crucial role in producing a-enhancement. Only under the assumption that the initial mass function is signi{\textregistered}cantly ¯attened with respect to the Salpeter value during the burst, can a Mg/Fe overabundant population be obtained. In particular, for the interpretations of radial gradients in metallicity and a-enhancement, the mixing of global and burst populations are of great importance. The model predicts bright {\textregistered}eld galaxies to be less a-enhanced than their counterparts in clusters.",
keywords = "stars : luminosity function, mass function, galaxies : abundances, galaxies : elliptical and lenticular, cD, galaxies : evolution, galaxies : formation, cosmology : theory",
author = "D Thomas",
year = "1999",
month = jul,
day = "1",
doi = "10.1046/j.1365-8711.1999.02552.x",
language = "English",
volume = "306",
pages = "655--661",
journal = "MNRAS",
issn = "0035-8711",
publisher = "Oxford University Press",
number = "3",

}

RIS

TY - JOUR

T1 - Abundance ratios in hierarchical galaxy formation

AU - Thomas, D

PY - 1999/7/1

Y1 - 1999/7/1

N2 - The chemical enrichment and stellar abundance ratios of galaxies that form in a hierarchical clustering scheme are calculated. For this purpose, I adopt the star formation histories (SFH) as they are delivered by semi-analytic models by Kauffmann. It turns out that the average SFH of cluster ellipticals does not yield globally a-enhanced stellar populations. The starburst that occurs when the elliptical forms in the major merger therefore plays a crucial role in producing a-enhancement. Only under the assumption that the initial mass function is signi®cantly ¯attened with respect to the Salpeter value during the burst, can a Mg/Fe overabundant population be obtained. In particular, for the interpretations of radial gradients in metallicity and a-enhancement, the mixing of global and burst populations are of great importance. The model predicts bright ®eld galaxies to be less a-enhanced than their counterparts in clusters.

AB - The chemical enrichment and stellar abundance ratios of galaxies that form in a hierarchical clustering scheme are calculated. For this purpose, I adopt the star formation histories (SFH) as they are delivered by semi-analytic models by Kauffmann. It turns out that the average SFH of cluster ellipticals does not yield globally a-enhanced stellar populations. The starburst that occurs when the elliptical forms in the major merger therefore plays a crucial role in producing a-enhancement. Only under the assumption that the initial mass function is signi®cantly ¯attened with respect to the Salpeter value during the burst, can a Mg/Fe overabundant population be obtained. In particular, for the interpretations of radial gradients in metallicity and a-enhancement, the mixing of global and burst populations are of great importance. The model predicts bright ®eld galaxies to be less a-enhanced than their counterparts in clusters.

KW - stars : luminosity function

KW - mass function

KW - galaxies : abundances

KW - galaxies : elliptical and lenticular, cD

KW - galaxies : evolution

KW - galaxies : formation

KW - cosmology : theory

U2 - 10.1046/j.1365-8711.1999.02552.x

DO - 10.1046/j.1365-8711.1999.02552.x

M3 - Article

VL - 306

SP - 655

EP - 661

JO - MNRAS

JF - MNRAS

SN - 0035-8711

IS - 3

ER -

ID: 1795813