NAGIOS: RODERIC FUNCIONANDO

The richest superclusters : I Morphology

Repositori DSpace/Manakin

IMPORTANT: Aquest repositori està en una versió antiga des del 3/12/2023. La nova instal.lació está en https://roderic.uv.es/

The richest superclusters : I Morphology

dc.contributor.author	Einasto, M.
dc.contributor.author	Saar, E.
dc.contributor.author	Liivamägi, L.J.
dc.contributor.author	Einasto, J.
dc.contributor.author	Tago, E.
dc.contributor.author	Martínez García, Vicent Josep
dc.contributor.author	Starck, J.-L.
dc.contributor.author	Müller, V.
dc.contributor.author	Heinämäki, P.
dc.contributor.author	Nurmi, P.
dc.contributor.author	Gramann, M.
dc.contributor.author	Hütsi, G.
dc.date.accessioned	2010-07-13T08:05:21Z
dc.date.available	2010-07-13T08:05:21Z
dc.date.issued	2007
dc.identifier.citation	EINASTO, M. et al., 2007, The richest superclusters : I Morphology, Astronomy and astrophysics, vol. 476, no. 2, p. 697-711	en
dc.identifier.uri	http://hdl.handle.net/10550/15989
dc.description.abstract	Context.Superclusters are the largest systems in the Universe to give us information about the formation and evolution of structures in the very early Universe. Our present series of papers is devoted to the study of the morphology and internal structure of superclusters of galaxies. Aims. We study the morphology of the richest superclusters from the catalogs of superclusters of galaxies in the 2dF Galaxy Redshift Survey and compare the morphology of real superclusters with model superclusters in the Millennium Simulation. Methods.We use Minkowski functionals and shapefinders to quantify the morphology of superclusters: their sizes, shapes, and clumpiness. We generate empirical models of simple geometry to understand which morphologies correspond to the supercluster shapefinders (Appendix A). Results. Rich superclusters have elongated, filamentary shapes with high-density clumps in their core regions. The clumpiness of superclusters is determined using the fourth Minkowski functional V3. In the K1-K2 shapefinder plane the morphology of superclusters is described by a curve which is characteristic of multi-branching filaments as shown by our empirical models. We found several differences between observed and model superclusters. The curves of the fourth Minkowski functional V3 for observed and model superclusters have different shapes indicating that their structure is different. The values of V3 for the supercluster SCL126 (the Sloan Great Wall) show that this supercluster has a very high density core which is absent in other superclusters. The values of the shapefinders H1-H3 and K1 and K2 for observed superclusters have much larger scatter than for model superclusters. The differences between the fourth Minkowski functional V3 for the bright and faint galaxies in observed superclusters are larger than in simulated superclusters. Conclusions.Our results show how the Minkowski functionals and shapefinders can be used to describe the morphology of superclusters: their shapes, sizes and clumpiness. The shapes of observed superclusters are more diverse than the shapes of simulated superclusters. The larger scatter of the fourth Minkowski functional V3 for the bright and faint galaxies for observed superclusters compared to simulated superclusters is an indication that the clumpiness of bright and faint galaxies in models does not reflect well the clumpiness of different galaxies in observed superclusters. Our results suggest also that the volume covered by the Millennium Simulations may be too small to properly describe the large morphological variety of superclusters.	en
dc.language.iso	en	en
dc.subject	Cosmology ; Large-scale structure of Universe ; Galaxies ; Clusters	en
dc.title	The richest superclusters : I Morphology	en
dc.type	journal article	es_ES
dc.subject.unesco	UNESCO::ASTRONOMÍA Y ASTROFÍSICA	en
dc.subject.unesco	UNESCO::ASTRONOMÍA Y ASTROFÍSICA::Cosmología y cosmogonia	en
dc.identifier.doi	10.1051/0004-6361:20078037	en
dc.identifier.idgrec	045211	en
dc.type.hasVersion	VoR	es_ES
dc.identifier.url	http://www.aanda.org/articles/aa/pdf/2007/47/aa8037-07.pdf	en