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• W2953313114 abstract "We present a multi-wavelength perspective of star-forming galaxies within high-redshift galaxy clusters. The clusters derive from the Red-sequence Cluster Survey (RCS) and the Spitzer Adaptation of the Red-sequence Cluster Survey (SpARCS), and possess ample spectroscopic coverage, yielding numerous confirmed cluster members. This thesis consists of a collection of distinct but related works, focusing on environmental effects within the dense regions of clusters – some of the rarest structures in the Universe. We exploit the high sensitivities of cutting-edge infrared and submillimeter telescopes to glean the wealth of information encoded within the thermal portion of the spectral energy distribution, including infrared luminosities and dust temperatures. This allows us to uncover various trends within the star-forming population as a function of environment. Moreover, we develop a novel definition of environment, based on the phase space of radius and velocity, to account for the various accretion histories of galaxies onto clusters; it thereby probes the time-averaged density that each galaxy population has experienced. Using this tracer of environment, we find a significant depression in the star formation rate per unit stellar mass for star-forming galaxies within cluster cores at z~0.9 and z~1.2, in contrast to the flat trend that results from conventional definitions of environment. We also discover a population of galaxies that have lower dust temperatures compared to both infalling galaxies and those that were accreted at the earliest stages of the formation of the cluster. Taken together, these trends in star formation rate and dust temperature can help elucidate which, if any, quenching mechanisms are active within cluster environments. Finally, we report the serendipitous detection of an overdensity of submillimeter-bright galaxies located behind a merging z~0.9 supercluster, which could signify a highly star-forming protocluster at z~3.%%%%Nous presentons une analyse multi-frequentielle de galaxies a formation d'etoiles situees a l'interieur d'amas de galaxies fortement decales vers le rouge. Ces amas en provenance du sondage Red-sequence Cluster Survey (RCS) et de son adaptation par Spitzer (SpARCS) possedent une large couverture spectroscopique et contiennent plusieurs membres confirmes. Cette these represente une collection de travaux distincts mais relies, qui se concentrent sur les effets environnementaux presents a l'interieur des regions denses d'amas de galaxies, des structures parmi les plus rares de l'Univers. Nous exploitons la sensibilite elevee des telescopes infrarouges et submillimetriques de pointe pour collecter l'information encodee dans la portion thermale de la distribution spectrale d'energie, ce qui inclue des mesures de luminosite infrarouge et des temperatures de poussiere. Cette methode nous permet de devoiler plusieurs tendances en cours a l'interieur de la population de galaxies a formation d'etoiles en fonction de l'environnement ou se trouvent ces galaxies. De plus,…" @default.
• W2953313114 created "2019-06-27" @default.
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• W2953313114 date "2013-11-01" @default.
• W2953313114 modified "2023-09-23" @default.
• W2953313114 title "Dusty star-forming galaxies within high-redshift galaxy clusters" @default.
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