Idioma:

The XXL Survey: XXX. Characterisation of the XLSSsC N01 supercluster and analysis of the galaxy stellar populations

Guglielmo, V ; Poggianti, B M ; Vulcani, B ; Moretti, A ; Fritz, J ; Gastaldello, F ; Adami, C ; Caretta, C A ; Willis, J ; Koulouridis, E ; Ramos Ceja, M E ; Giles, P ; Baldry, I ; Birkinshaw, M ; Bongiorno, A ; Brown, M ; Chiappetti, L ; Driver, S ; Elyiv, A ; Evrard, A ; Grootes, M ; Guennou, L ; Hopkins, A ; Horellou, C ; Iovino, A ; Maurogordato, S ; Owers, M ; Pacaud, F ; Paltani, S ; Pierre, M ; Plionis, M ; Ponman, T ; Robotham, A ; Sadibekova, T ; Smolčić, V ; Tuffs, R ; Vignali, C

arXiv.org, 2018-05

Ithaca: Cornell University Library, arXiv.org

Texto completo disponível

Citações Citado por

Enviar para

Título:
The XXL Survey: XXX. Characterisation of the XLSSsC N01 supercluster and analysis of the galaxy stellar populations
Autor: Guglielmo, V ; Poggianti, B M ; Vulcani, B ; Moretti, A ; Fritz, J ; Gastaldello, F ; Adami, C ; Caretta, C A ; Willis, J ; Koulouridis, E ; Ramos Ceja, M E ; Giles, P ; Baldry, I ; Birkinshaw, M ; Bongiorno, A ; Brown, M ; Chiappetti, L ; Driver, S ; Elyiv, A ; Evrard, A ; Grootes, M ; Guennou, L ; Hopkins, A ; Horellou, C ; Iovino, A ; Maurogordato, S ; Owers, M ; Pacaud, F ; Paltani, S ; Pierre, M ; Plionis, M ; Ponman, T ; Robotham, A ; Sadibekova, T ; Smolčić, V ; Tuffs, R ; Vignali, C
Assuntos: Density ; Dependence ; Depletion ; Galactic clusters ; Galactic evolution ; Galactic superclusters ; Galaxies ; Galaxy distribution ; Large scale structure of the universe ; Luminosity ; Physics - Astrophysics of Galaxies ; Spectral energy distribution ; Star & galaxy formation ; Star formation ; Stellar age ; Stellar populations ; Universe
É parte de: arXiv.org, 2018-05
Descrição: Superclusters form from the largest enhancements in the primordial density perturbation field and extend for tens of Mpc, tracing the large-scale structure of the Universe. We characterise XLSSsCN01, a rich supercluster at z~0.3 detected in the XXL Survey, composed of X-ray clusters of different virial masses and luminosities. As one of the first studies on this topic, we investigate the stellar populations of galaxies in different environments in the supercluster region. We study a magnitude-limited (r<=20) and a mass-limited sample (log(M*/M_sun)>10.8) of galaxies in the virialised region and in the outskirts of 11 XLSSsCN01 clusters, in high- and low-density field. We compute the stellar population properties of galaxies using spectral energy distribution and spectral fitting techniques, and study the dependence of star formation rates (SFR), colours, and stellar ages on environment. For r<20, the fraction of SFing/blue galaxies, computed either from the specific-SFR (sSFR) or rest-frame(rf) colour, shows depletion within the cluster virial radii, where the number of galaxies with log(sSFR/yr^-1)>-12 and with (g-r)_rf<0.6 is lower than in the field. For log(M*/M_sun)>10.8, no trends with environment emerge, as massive galaxies are mostly already passive in all environments. No differences among low- and high-density field members and cluster members emerge in the sSFR-mass relation. The luminosity-weighted age-mass relation of the passive populations within cluster virial radii show signatures of recent environmental quenching. The study of luminous and massive galaxies in this supercluster shows that while environment has a prominent role in determining the fractions of SFing/blue galaxies, its effects on the star formation activity in SFing galaxies are negligible.
Editor: Ithaca: Cornell University Library, arXiv.org
Idioma: Inglês

Links

Voltar para lista de resultados

Realização: Logos de Redes Sociais:

The XXL Survey: XXX. Characterisation of the XLSSsC N01 supercluster and analysis of the galaxy stellar populations

Ithaca: Cornell University Library, arXiv.org

Buscando em bases de dados remotas. Favor aguardar.