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  The hELENa project - II. Abundance distribution trends of early-type galaxies: from dwarfs to giants

Sybilska, A., Kuntschner, H., van de Ven, G., Vazdekis, A., Falcón-Barroso, J., Peletier, R. F., et al. (2018). The hELENa project - II. Abundance distribution trends of early-type galaxies: from dwarfs to giants. Monthly Notices of the Royal Astronomical Society, 476, 4501-4509.

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Item Permalink: https://hdl.handle.net/21.11116/0000-0005-CAD6-6 Version Permalink: https://hdl.handle.net/21.11116/0000-0005-CAD7-5
Genre: Journal Article

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https://ui.adsabs.harvard.edu/abs/2018MNRAS.476.4501S (Any fulltext)
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 Creators:
Sybilska, A.1, Author
Kuntschner, H.1, Author
van de Ven, G.1, Author
Vazdekis, A.1, Author
Falcón-Barroso, J.1, Author
Peletier, R. F.1, Author
Lisker, T.1, Author
Affiliations:
1Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners, ou_2421692              

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Free keywords: galaxies: abundances galaxies: dwarf galaxies: evolution galaxies: stellar content galaxies: structure Astrophysics - Astrophysics of Galaxies
 Abstract: In this second paper of The role of Environment in shaping Low-mass Early-type Nearby galaxies (hELENa) series we study [Mg/Fe] abundance distribution trends of early-type galaxies (ETGs) observed with the Spectrographic Areal Unit for Research on Optical Nebulae integral field unit, spanning a wide range in mass and local environment densities: 20 low-mass early types (dEs) of Sybilska et al. and 258 massive early types (ETGs) of the ATLAS3D project, all homogeneously reduced and analysed. We show that the [Mg/Fe] ratios scale with velocity dispersion (σ) at fixed [Fe/H] and that they evolve with [Fe/H] along similar paths for all early types, grouped in bins of increasing local and global σ, as well as the second velocity moment Vrms, indicating a common inside-out formation pattern. We then place our dEs on the [Mg/Fe] versus [Fe/H] diagram of Local Group galaxies and show that dEs occupy the same region and show a similar trend line slope in the diagram as the high-metallicity stars of the Milky Way and the Large Magellanic Cloud. This finding extends the similar trend found for dwarf spheroidal versus dwarf irregular galaxies and supports the notion that dEs have evolved from late-type galaxies that have lost their gas at a point of their evolution, which likely coincided with them entering denser environments.

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 Dates: 2018
 Publication Status: Issued
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Title: Monthly Notices of the Royal Astronomical Society
Source Genre: Journal
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Pages: - Volume / Issue: 476 Sequence Number: - Start / End Page: 4501 - 4509 Identifier: -