SIMBAD references

2015MNRAS.450.1338S - Mon. Not. R. Astron. Soc., 450, 1338-1348 (2015/June-3)

The stellar populations in the low-luminosity, early-type galaxy NGC 59.

SANSOM A.E., THIRLWALL J.J., DEAKIN M.A., VAISANEN P., KNIAZEV A.Y. and VAN LOON J.Th.

Abstract (from CDS):

Low-luminosity galaxies may be the building blocks of more luminous systems. Southern African Large Telescope observations of the low-luminosity, early-type galaxy NGC 59 are obtained and analysed. These data are used to measure the stellar population parameters in the centre and off-centre regions of this galaxy, in order to uncover its likely star formation history. We find evidence of older stars, in addition to young stars in the emission-line regions. The metallicity of the stellar population is constrained to be [Z/H] ∼ -1.1 to -1.6, which is extremely low, even for this low-luminosity galaxy, since it is not classed as a dwarf spheroidal galaxy. The measured [α/Fe] ratio is subsolar, which indicates an extended star formation history in NGC 59. If such objects formed the building blocks of more massive, early-type galaxies, then they must have been gaseous mergers, rather than dry mergers, in order to increase the metals to observed levels in luminous, early-type galaxies.

Abstract Copyright: © 2015 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society (2015)

Journal keyword(s): galaxies: abundances - galaxies: elliptical and lenticular, cD - galaxies: individual: NGC 59 - galaxies: stellar content

Simbad objects: 5

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2019.12.07-14:50:43

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