Steps towards a map of the nearby universe

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dc.creatord'Abrusco, R.
dc.creatorLongo, G.
dc.creatorStaiano, A.
dc.creatorde Filippis, E.
dc.creatorPaolillo, M.
dc.creatorBrescia, M.
dc.date2007-01-05
dc.date2007-01-28
dc.date.accessioned2026-07-07T10:36:46Z
dc.date.available2026-07-07T10:36:46Z
dc.descriptionWe present a new analysis of the Sloan Digital Sky Survey data aimed at producing a detailed map of the nearby (z < 0.5) universe. Using neural networks trained on the available spectroscopic base of knowledge we derived distance estimates for about 30 million galaxies distributed over ca. 8,000 sq. deg. We also used unsupervised clustering tools developed in the framework of the VO-Tech project, to investigate the possibility to understand the nature of each object present in the field and, in particular, to produce a list of candidate AGNs and QSOs.
dc.description3 pages, 1 figure. To appear in Nucl Phys. B, in the proceedings of the NOW-2006 (Neutrino Oscillation Workshop - 2006), R. Fogli et al. eds
dc.identifierhttps://arxiv.org/abs/astro-ph/0701135
dc.identifierhttp://arxiv.org/abs/astro-ph/0701135
dc.identifierNucl.Phys.Proc.Suppl.168:299-301,2007
dc.identifierdoi:10.1016/j.nuclphysbps.2007.02.027
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/180164
dc.subjectAstrophysics
dc.titleSteps towards a map of the nearby universe
dc.typetext

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