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Strong Balmer lines in old ellipticals

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Strong Balmer lines in old ellipticals. / Maraston, C; Thomas, D.

In: Astrophysics and Space Science, Vol. 277, No. 1, 01.05.2001, p. 295-298.

Research output: Contribution to journalArticle

Harvard

Maraston, C & Thomas, D 2001, 'Strong Balmer lines in old ellipticals', Astrophysics and Space Science, vol. 277, no. 1, pp. 295-298. https://doi.org/0.1023/A:1012700515985

APA

Vancouver

Author

Maraston, C ; Thomas, D. / Strong Balmer lines in old ellipticals. In: Astrophysics and Space Science. 2001 ; Vol. 277, No. 1. pp. 295-298.

Bibtex

@article{94adb93f58544807b0d76ae7cb3e8494,
title = "Strong Balmer lines in old ellipticals",
abstract = "Because of the wide range of Balmer line strengths observed, elliptical galaxies are usually interpreted to exhibit an appreciable scatter in age. Here we show that Composite Stellar Population models containing an old metal-poor subcomponent simultaneously produce strong Balmer lines and strong metallic lines without invoking a young population. The key to this result is that our SSP models better match the steep increase of Hβ in metal-poor globular clusters than models in the literature. Hence, the scatter of Hβobserved in cluster and luminous field elliptical galaxies can be explained by a spread in the metallicity of old stellar populations. The proposed model is checked against other observational constraints like colors and the flux in the mid-UV.",
keywords = "galaxies : elliptical and lenticular, cD, galaxies : abundances, galaxies : formation, galaxies : evolution, cosmology : theory",
author = "C Maraston and D Thomas",
year = "2001",
month = may
day = "1",
doi = "0.1023/A:1012700515985",
language = "English",
volume = "277",
pages = "295--298",
journal = "Astrophysics and Space Science",
issn = "0004-640X",
publisher = "Springer Netherlands",
number = "1",

}

RIS

TY - JOUR

T1 - Strong Balmer lines in old ellipticals

AU - Maraston, C

AU - Thomas, D

PY - 2001/5/1

Y1 - 2001/5/1

N2 - Because of the wide range of Balmer line strengths observed, elliptical galaxies are usually interpreted to exhibit an appreciable scatter in age. Here we show that Composite Stellar Population models containing an old metal-poor subcomponent simultaneously produce strong Balmer lines and strong metallic lines without invoking a young population. The key to this result is that our SSP models better match the steep increase of Hβ in metal-poor globular clusters than models in the literature. Hence, the scatter of Hβobserved in cluster and luminous field elliptical galaxies can be explained by a spread in the metallicity of old stellar populations. The proposed model is checked against other observational constraints like colors and the flux in the mid-UV.

AB - Because of the wide range of Balmer line strengths observed, elliptical galaxies are usually interpreted to exhibit an appreciable scatter in age. Here we show that Composite Stellar Population models containing an old metal-poor subcomponent simultaneously produce strong Balmer lines and strong metallic lines without invoking a young population. The key to this result is that our SSP models better match the steep increase of Hβ in metal-poor globular clusters than models in the literature. Hence, the scatter of Hβobserved in cluster and luminous field elliptical galaxies can be explained by a spread in the metallicity of old stellar populations. The proposed model is checked against other observational constraints like colors and the flux in the mid-UV.

KW - galaxies : elliptical and lenticular, cD

KW - galaxies : abundances

KW - galaxies : formation

KW - galaxies : evolution

KW - cosmology : theory

U2 - 0.1023/A:1012700515985

DO - 0.1023/A:1012700515985

M3 - Article

VL - 277

SP - 295

EP - 298

JO - Astrophysics and Space Science

JF - Astrophysics and Space Science

SN - 0004-640X

IS - 1

ER -

ID: 1795778