Motivated by spectroscopic confirmation of three overdense regions in the COSMOS field at z similar to 3.35, we analyse the uniquely deep multiwavelength photometry and extensive spectroscopy available in the field to identify any further related structure. We construct a three-dimensional density map using the Voronoi tesselation Monte Carlo method and find additional regions of significant overdensity. Here, we present and examine a set of six overdense structures at 3.20 < z < 3.45 in the COSMOS field, the most well-characterized of which, PCl J0959 + 0235, has 80 spectroscopically confirmed members and an estimated mass of 1.35 x 10(15) M-circle dot, and is modelled to virialize at z similar to 1.5-2.0. These structures contain 10 overdense peaks with >5 sigma overdensity separated by up to 70 cMpc, suggestive of a proto-supercluster similar to the Hyperion system at z similar to 2.45. Upcoming photometric surveys with JWST such as COSMOS-Web, and further spectroscopic follow-up will enable more extensive analysis of the evolutionary effects that such an environment may have on its component galaxies at these early times.
Elentári:a massive proto-supercluster at z ∼ 3.3 in the cosmos field / Forrest, Ben; Lemaux, Brian C; Shah, Ekta; Staab, Priti; McConachie, Ian; Cucciati, Olga; Gal, Roy R; Hung, Denise; Lubin, Lori M; Cassarà, Letizia P; Cassata, Paolo; Chang, Wenjun; Cooper, M C; Decarli, Roberto; Gomez, Percy; Gururajan, Gayathri; Hathi, Nimish; Kashino, Daichi; Marchesini, Danilo; Marsan, Z Cemile; McDonald, Michael; Muzzin, Adam; Shen, Lu; Stawinski, Stephanie Urbano; Talia, Margherita; Vergani, Daniela; Wilson, Gillian; Zamorani, Giovanni. - In: MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY. LETTERS. - ISSN 1745-3925. - STAMPA. - 526:1(2023), pp. 56-62. [10.1093/mnrasl/slad114]
Elentári:a massive proto-supercluster at z ∼ 3.3 in the cosmos field
Cucciati, Olga;Gururajan, GayathriMembro del Collaboration Group
;Talia, MargheritaMembro del Collaboration Group
;Vergani, Daniela;
2023
Abstract
Motivated by spectroscopic confirmation of three overdense regions in the COSMOS field at z similar to 3.35, we analyse the uniquely deep multiwavelength photometry and extensive spectroscopy available in the field to identify any further related structure. We construct a three-dimensional density map using the Voronoi tesselation Monte Carlo method and find additional regions of significant overdensity. Here, we present and examine a set of six overdense structures at 3.20 < z < 3.45 in the COSMOS field, the most well-characterized of which, PCl J0959 + 0235, has 80 spectroscopically confirmed members and an estimated mass of 1.35 x 10(15) M-circle dot, and is modelled to virialize at z similar to 1.5-2.0. These structures contain 10 overdense peaks with >5 sigma overdensity separated by up to 70 cMpc, suggestive of a proto-supercluster similar to the Hyperion system at z similar to 2.45. Upcoming photometric surveys with JWST such as COSMOS-Web, and further spectroscopic follow-up will enable more extensive analysis of the evolutionary effects that such an environment may have on its component galaxies at these early times.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
