Connecting the growth of galaxies to the large-scale environment in a massive node of the Cosmic Web at z ∼ 3

被引：0

作者：

Galbiati, M. ^{[1
]}

Cantalupo, S. ^{[1
]}

Steidel, C. ^{[2
]}

Pensabene, A. ^{[1
]}

Travascio, A. ^{[1
]}

Wang, W. ^{[1
]}

Fossati, M. ^{[1
,3
]}

Fumagalli, M. ^{[1
,4
]}

Rudie, G. ^{[5
]}

Fresco, A. ^{[1
]}

Lazeyras, T. ^{[1
]}

Ledos, N. ^{[1
]}

Quadri, G. ^{[1
]}

机构：

[1] Univ Studi Milano Bicocca, Dipartimento Fis G Occhialini, Piazza Sci 3, I-20126 Milan, Italy

[2] CALTECH, Dept Astron, 1200 E Calif Blvd, MC 249-17, Pasadena, CA 91125 USA

[3] INAF Osservatorio Astron Brera, Via Brera 28, I-21021 Milan, Italy

[4] INAF Osservatorio Astron Trieste, Via GB Tiepolo 11, I-34143 Trieste, Italy

[5] Carnegie Sci Observ, 813 St Barbara St, Pasadena, CA 91101 USA

来源：

ASTRONOMY & ASTROPHYSICS | 2025年 / 696卷

基金：

欧洲研究理事会;

关键词：

galaxies: evolution; galaxies: high-redshift; galaxies: star formation; large-scale structure of Universe; LY-ALPHA-EMITTERS; REST-FRAME ULTRAVIOLET; STAR-FORMING GALAXIES; LYMAN BREAK GALAXIES; REDSHIFT RADIO GALAXIES; ACTIVE GALACTIC NUCLEI; UV LUMINOSITY FUNCTION; STELLAR MASS; PROTO-CLUSTER; H-ALPHA;

D O I：

10.1051/0004-6361/202452493

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

A direct link between the large-scale environment and galaxy properties is very well established in the local Universe. However, very little is known about the role of the environment for galaxy growth before the peak of the cosmic star formation history at z > 3 due to the rarity of high-redshift, overdense structures. Using a combination of deep, multiwavelength observations, including MUSE, JWST, Chandra, HST, and ground-based imaging, we detected and studied the properties of a population of star-forming galaxies in the field of a hyperluminous quasar at z approximate to 3.25 associated with the giant Ly alpha nebula MQN01. We find that this region hosts one of the largest overdensities of galaxies discovered so far at z > 3, with rho/(rho) over bar = 53 +/- 17 within 4 x 4 cMpc(2) and |Delta v|<= 1000 km s(-1) from the quasar, providing a unique laboratory for studying the link between overdense regions and galaxy properties at high redshift. Even in these rare overdense regions, galaxies form stars at a rate consistent with the main sequence at z approximate to 3, demonstrating that their star formation rate (SFR) is regulated by local properties correlated with their stellar mass rather than by their environment. However, the high-mass end of the stellar mass function is significantly elevated with respect to that of galaxies in the field at log(M-star/M-circle dot)greater than or similar to 10.5, suggesting that massive galaxies in overdense regions build up their stellar mass earlier or more efficiently than in average regions of the Universe. Finally, the overdensity of color-selected Lyman break galaxies observed on larger scales, across approximate to 24 x 24 cMpc(2), is found to be aligned toward the structure traced by the spectroscopically confirmed galaxies identified with MUSE in the inner 4 x 4 cMpc(2), suggesting that this highly overdense region could extend further, up to a few tens of comoving megaparsecs.

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