An environmental dependence of the physical and structural properties in the Hydra cluster galaxies

Autor(es):Mostrar menos -

Lima-Dias, Ciria ^[1] ; Monachesi, Antonela ^{[1, 2]} ; Torres-Flores, Sergio ^[1] ; Cortesi, Arianna ^{[3, 4]} ; Hernandez-Lang, Daniel ^[5] ; Barbosa, Carlos Eduardo ^{[6, 4]} ; de Oliveira, Claudia Mendes ^[4] ; Olave-Rojas, Daniela ^[7] ; Pallero, Diego ^[1] ; Sampedro, Laura ^[4] ; Molino, Alberto ^[4] ; Herpich, Fabio R. ^[4] ; Jaffe, Yara L. ^[8] ; Amorin, Ricardo ^{[1, 2]} ; Chies-Santos, Ana L. ^[9] ; Dimauro, Paola ^[10] ; Telles, Eduardo ^[10] ; Lopes, Paulo A. A. ^[3] ; Alvarez-Candal, Alvaro ^{[10, 11]} ; Ferrari, Fabricio ^[12] ; Kanaan, Antonio ^[13] ; Ribeiro, Tiago ^[14] ; Schoenell, William ^[15]

Afiliação do(s) autor(es):Mostrar menos -

^[1] Univ La Serena, Dept Astron, Av Cistentas 1200, La Serena - Chile

^[2] Univ La Serena, Inst Invest Multidisciplinar Ciencia & Tecnol, Rata Bitran 1305, La Serena - Chile

^[3] Univ Fed Rio de Janeiro, Observ Valongo, Ladeira Pedro Antonio 43, BR-20080090 Rio De Janeiro, RJ - Brazil

^[4] Univ Sao Paulo, Inst Astron Geofis & Ciencias Atmosfer, Cidade Univ, BR-05508900 Sao Paulo, SP - Brazil

^[5] Ludwig Maximilians Univ Munchen, Fac Phys, Scheinerstr 1, D-81679 Munich - Germany

^[6] Univ Arizona, Steward Observ, 933 N Cherry Ave, Tucson, AZ 85719 - USA

^[7] Univ Talca, Dept Tecnol Ind, Los Niches Km 1, Curico 3340000 - Chile

^[8] Univ Valparaiso, Inst Fis & Astron, Avda Gran Bretana 1111, Valparaiso - Chile

^[9] Univ Fed Rio Grande do Sul UFRGS, Inst Fis, Dept Astron, Av Bento Goncalves 9500, Porto Alegre, RS - Brazil

^[10] Observ Nacl MCTIC, Rua Gen Jose Cristino 77, BR-20921400 Rio De Janeiro, RJ - Brazil

^[11] Univ Alicante, Inst Univ Fis Aplicada Ciencias & Tecnol, E-03080 Alicante - Spain

^[12] Univ Fed Rio Grande, Inst Matemat Estat & Fis, BR-96201900 Rio Grande, RS - Brazil

^[13] Univ Fed Santa Catarina, Ctr Ciencias Fis & Matemt, Dept Fis, BR-88040900 Florianopolis, SC - Brazil

^[14] LSST Project Off, 950 N Cherry Ave, Tucson, AZ 85719 - USA

^[15] GMTO Corp, 465 N Halstead St, Suite 250, Pasadena, CA 91107 - USA

• Tipo de documento: Artigo Científico
• Fonte: Monthly Notices of the Royal Astronomical Society; v. 500, n. 1, p. 1323-1339, JAN 2021.
• Citações Web of Science: 0

Resumo

The nearby Hydra cluster (similar to 50 Mpc) is an ideal laboratory to understand, in detail, the influence of the environment on the morphology and quenching of galaxies in dense environments. We study the Hydra cluster galaxies in the inner regions (1R200) of the cluster using data from the Southern Photometric Local Universe Survey, which uses 12 narrow and broad-band filters in the visible region of the spectrum. We analyse structural (Sersic index, effective radius) and physical (colours, stellarmasses, and star formation rates) properties. Based on this analysis, we find that similar to 88 per cent of the Hydra cluster galaxies are quenched. Using the Dressler-Schectman test approach, we also find that the cluster shows possible substructures. Our analysis of the phase-space diagram together with density-based spatial clustering algorithm indicates that Hydra shows an additional substructure that appears to be in front of the cluster centre, which is still falling into it. Our results, thus, suggest that the Hydra cluster might not be relaxed. We analyse the median Sersic index as a function of wavelength and find that for red {[}(u - r) >= 2.3] and early-type galaxies it displays a slight increase towards redder filters (13 and 18 per cent, for red and early type, respectively), whereas for blue + green {[}(u - r)<2.3] galaxies it remains constant. Late-type galaxies show a small decrease of the median Sersic index towards redder filters. Also, the Sersic index of galaxies, and thus their structural properties, do not significantly vary as a function of clustercentric distance and density within the cluster; and this is the case regardless of the filter. (AU)

• Processo FAPESP: 14/11806-9 - Desafios para a nova geração de mapeamentos fotométricos de grande campo como o J-PAS
• Beneficiário: Alberto Molino Benito
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado
• Processo FAPESP: 16/21664-2 - The Southern-Physics of the local universe survey: calibração, catalogação e exploração científica
• Beneficiário: Laura Maria Sampedro Hernandez
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado