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Please use this identifier to cite or link to this item: http://hdl.handle.net/10481/28416

Title: AMIGA: very low environment galaxies in the local universe
Authors: Verley, S.
Combes, F.
Verdes-Montenegro, L.
Leon, S.
Odewahn, S. C.
Bergond, G.
Espada, D.
García, E.
Lisenfeld, Ute
Sabater, J.
Sulentic, J.
Issue Date: 2006
Abstract: The evolutionary history of galaxies is thought to be strongly conditioned by the environment. In order to quantify and set limits on the role of nurture one must identify and study an isolated sample of galaxies. But it is not enough to identify a small number of the "most isolated" galaxies. We begin with 950 galaxies from the Catalogue of Isolated Galaxies (Karachentseva 1973) and reevaluate isolation using an automated star-galaxy classification procedure on large digitised POSS-I fields. We define, compare and discuss various criteria to quantify the degree of isolation for these galaxies: Karachentseva's revised criterion, local surface density computations and an estimation of the external tidal force affecting each isolated galaxy. Comparison of multi-wavelength ISM properties, in particular the H$\alpha$ emission line, will allow us to separate the influence of the environment from the one due to the initial conditions at formation.
Publisher: EDP Sciences
Keywords: AMIGA (Analysis of the interstellar Medium of Isolated Galaxies)
Galaxies
ISM
URI: http://hdl.handle.net/10481/28416
Rights : Creative Commons Attribution-NonCommercial-NoDerivs 3.0 License
Citation: Verley, S.; et al. AMIGA: very low environment galaxies in the local universe. In: F. Casoli, et al. (eds.), SF2A 2005: Seamine de l'Astrophysique Francaise. Strasbourg (France), 27 june- 1 july 2005. pp. 237-238. [http://hdl.handle.net/10481/28416]
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