Structure and dynamics of the supercluster of galaxies SC0028-0005

Autor(es)

O'Mill, Ana Laura ^{[1, 2]} ; Proust, Dominique ^[3] ; Capelato, Hugo V. ^{[4, 5]} ; Castejon, Mirian ^[1] ; Cypriano, Eduardo S. ^[1] ; Lima Neto, Gastao B. ^[1] ; Sodre, Jr., Laerte ^[1]

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo, Inst Astron Geofis & Ciencias Atmosfer, Dept Astron, BR-05508090 Sao Paulo - Brazil

^[2] CONICET UNC, Inst Astron Teor & Expt, Cordoba - Argentina

^[3] GEPI, Observ Paris Meudon, F-92195 Meudon - France

^[4] Univ Cruzeiro Sul, Nucleo Astrofis Teor, BR-01506000 Sao Paulo - Brazil

^[5] INPE MCT, Div Astrofis, BR-12227010 Sao Jose Dos Campos, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Monthly Notices of the Royal Astronomical Society; v. 453, n. 1, p. 868-878, OCT 11 2015.
• Citações Web of Science: 6

Resumo

According to the standard cosmological scenario, superclusters are objects that have just passed the turn-around point and are collapsing. The dynamics of very few superclusters have been analysed up to now. In this paper, we study the supercluster SC0028-0005, at redshift 0.22, identify the most prominent groups and/or clusters that make up the supercluster, and investigate the dynamic state of this structure. For the membership identification, we have used photometric and spectroscopic data from Sloan Digital Sky Survey Data Release 10, finding six main structures in a flat spatial distribution. We have also used a deep multiband observation with MegaCam/Canada-France-Hawaii Telescope to estimate de mass distribution through the weak-lensing effect. For the dynamical analysis, we have determined the relative distances along the line of sight within the supercluster using the Fundamental Plane of early-type galaxies. Finally, we have computed the peculiar velocities of each of the main structures. The 3D distribution suggests that SC0028-005 is indeed a collapsing supercluster, supporting the formation scenario of these structures. Using the spherical collapse model, we estimate that the mass within r = 10 Mpc should lie between 4 and 16 x 10(15) M-circle dot. The farthest detected members of the supercluster suggest that within similar to 60 Mpc the density contrast is delta similar to 3 with respect to the critical density at z = 0.22, implying a total mass of similar to 4.6-16 x 10(17) M-circle dot, most of which in the form of low-mass galaxy groups or smaller substructures. (AU)

• Processo FAPESP: 13/14817-9 - O superaglomerado de galáxias SC0028-0001 sob lentes gravitacionais
• Beneficiário: Mirian Castejon Molina
• Linha de fomento: Bolsas no Brasil - Mestrado
• Processo FAPESP: 14/13723-3 - Aglomerados de galáxias como portais para o universo escuro
• Beneficiário: Eduardo Serra Cypriano
• Linha de fomento: Auxílio à Pesquisa - Regular
• Processo FAPESP: 12/00800-4 - O universo em 3-D: astrofísica com grandes levantamentos de galáxias
• Beneficiário: Laerte Sodré Junior
• Linha de fomento: Auxílio à Pesquisa - Temático
• Processo FAPESP: 11/09565-5 - Identificação de estruturas em catálogos fotométricos
• Beneficiário: Ana Laura O'Mill
• Linha de fomento: Bolsas no Brasil - Pós-Doutorado