Co-orbiting satellite galaxy structures are still in conflict with the distribution of primordial dwarf galaxies
Marcel S. Pawlowski, Benoit Famaey, Helmut Jerjen, David Merritt, Pavel Kroupa, Jörg Dabringhausen, Fabian Lüghausen, Duncan A. Forbes, Gerhard Hensler, François Hammer, Mathieu Puech, Sylvain Fouquet, Hector Flores, Yanbin Yang
(Submitted on 6 Jun 2014)
Source/Fonte: Space
Both major galaxies in the Local Group host planar distributions of co-orbiting satellite galaxies, the Vast Polar Structure (VPOS) of the Milky Way and the Great Plane of Andromeda (GPoA). The ΛCDM cosmological model did not predict these features. However, according to three recent studies the properties of the GPoA and the flattening of the VPOS are common features among sub-halo based ΛCDM satellite systems, and the GPoA can be naturally explained by satellites being acquired along cold gas streams. We point out some methodological issues in these studies: either the selection of model satellites is different from that of the observed ones, or an incomplete set of observational constraints has been considered, or the observed satellite distribution is inconsistent with basic assumptions. Once these issues have been addressed, the conclusions are different: features like the VPOS and GPoA are very rare (each with probability ≲10−3, and combined probability <10 a="" accretion="" along="" and="" are="" cold="" combined="" dwarf="" explanation="" font="" formation.="" from="" galaxy="" gpoa.="" if="" in="" is="" modelling="" natural="" no="" of="" origin="" paradigm="" planar="" remains="" satellites="" selected="" semi-analytic="" simulation="" standard="" streams="" structures="" the="" unexplained="" with="">
Comments: 19 pages, 9 figures, 6 tables, accepted for publication in MNRAS
Subjects: Astrophysics of Galaxies (astro-ph.GA); Cosmology and Nongalactic Astrophysics (astro-ph.CO)
Cite as: arXiv:1406.1799 [astro-ph.GA]
(or arXiv:1406.1799v1 [astro-ph.GA] for this version)
Submission history
From: Marcel Pawlowski [view email]
[v1] Fri, 6 Jun 2014 20:00:03 GMT (815kb)
FREE PDF GRATIS: ArXiv
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NOTA DESTE BLOGGER:
Quando físicos e astrofísicos se deparam com anomalias que o paradigma aceito não explica, eles falam em revisar o paradigma. Já os biólogos, especialmente quando a questão é Darwin, eles fazem de conta que são cegos, surdos e mudos sobre a questão. Uma teoria científica falida desde 1859 e que posa de ortodoxia científica nos livros didáticos aprovados e indicados pelo MEC/SEMTEC/PNLEM, fica devendo explicações para as montanhas de evidências contra a teoria da evolução encontradas no contexto de justificação teórica.
