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Early results from the JWST observations have reported a surprisingly high number of UV-bright galaxies at $z \geq 10$, which appears to challenge the theoretical predictions from standard galaxy formation models in the $\Lambda$CDM…

Astrophysics of Galaxies · Physics 2024-07-30 Anirban Chakraborty , Tirthankar Roy Choudhury

We investigate early galaxy evolution by modeling self-consistently their radially-resolved evolution of gas, stars, heavy elements, and dust content. Our model successfully reproduces various observed properties of JWST-identified galaxies…

Astrophysics of Galaxies · Physics 2025-02-19 Daisuke Toyouchi , Hidenobu Yajima , Andrea Ferrara , Kentaro Nagamine

The generation and evolution of dust in galaxies are important tracers for star formation, and can characterize the rest-frame ultraviolet to infrared emission from the galaxies. In particular understanding dust in high-redshift galaxies…

Astrophysics of Galaxies · Physics 2023-10-05 Daichi Tsuna , Yurina Nakazato , Tilman Hartwig

We probe galactic-scale outflows in star-forming galaxies at $z\gtrsim2.5$ drawn from the \textit{JWST}/NIRSpec AURORA program. For the first time, we directly compare outflow properties from the early universe to the present day using…

The first few cycles of JWST have identified an overabundance of UV-bright galaxies and a general excess of UV luminosity density at $z\gtrsim10$ compared to expectations from most (pre-JWST) theoretical models. Moreover, some of the…

Astrophysics of Galaxies · Physics 2024-12-03 Harley Katz , Alexander P. Ji , O. Grace Telford , Peter Senchyna

We show that the accumulated light of galaxies in the ultraviolet can be evaluated from their luminosity density as a function of the evolution of the cosmic star formation rate and dust extinction properties. Constraints on the evolution…

Astrophysics · Physics 2009-11-10 J. -M. Deharveng , V. Buat , B. Milliard

We show that the rest-frame UV statistics and global properties of galaxies at 7 <= z <= 14 are naturally reproduced within the standard {\Lambda}CDM framework when galaxy formation is modeled with UniverseMachine applied to the…

Astrophysics of Galaxies · Physics 2026-04-22 Francisco Prada , Peter Behroozi , Tomoaki Ishiyama , Enrique Pérez , Anatoly Klypin , Xin Wang , José Ruedas

Measurements of interstellar absorption lines in 18 ultraluminous infrared galaxies (ULIGs) have been combined with published data, in order to reassess the dependence of galactic outflow speeds on starburst luminosity and galactic mass.…

Astrophysics · Physics 2010-04-06 Crystal L. Martin

The field of high redshift galaxy formation has been revolutionised by JWST, which is yielding unprecedented insights on galaxy assembly at early times. Our key aim is to study the physical mechanisms that can explain the unexpected…

Astrophysics of Galaxies · Physics 2025-04-23 Valentin Mauerhofer , Pratika Dayal , Martin G. Haehnelt , Taysun Kimm , Joakim Rosdahl , Romain Teyssier

We investigate galactic-scale outflows in the redshift range 0.71 < z < 1.63, using 413 K-band selected galaxies observed in the spectroscopic follow-up of the UKIDSS Ultra-Deep Survey (UDSz). The galaxies have an average stellar mass of…

Early JWST observations have revealed substantial numbers of galaxies out to redshifts as high as $z \simeq 14$, reflecting a slow evolution of the galaxy UV luminosity function (LF) not anticipated by many models of galaxy evolution. The…

Astrophysics of Galaxies · Physics 2025-04-16 C. T. Donnan , J. S. Dunlop , R. J. McLure , D. J. McLeod , F. Cullen

The abundance and blue color of super-early (redshift $z>10$), luminous galaxies discovered by JWST can be explained if radiation-driven outflows have ejected their dust on kpc-scales. To test this hypothesis, we predict the ALMA…

Astrophysics of Galaxies · Physics 2025-02-19 A. Ferrara , S. Carniani , F. di Mascia , R. Bouwens , P. Oesch , S. Schouws

The high-redshift galaxy UV luminosity function (UVLF) has become essential for understanding the formation and evolution of the first galaxies. Yet, UVLFs only measure galaxy abundances, giving rise to a degeneracy between the mean galaxy…

Cosmology and Nongalactic Astrophysics · Physics 2023-08-22 Julian B. Muñoz , Jordan Mirocha , Steven Furlanetto , Nashwan Sabti

We study outflows in 130 galaxies with -22<MUV<-16 at z=3-9 identified in JWST NIRSpec and NIRCam WFSS data taken by the ERO, CEERS, FRESCO, GLASS, and JADES programs. We identify 30 out of the 130 galaxies with broad components of…

Astrophysics of Galaxies · Physics 2025-03-31 Yi Xu , Masami Ouchi , Kimihiko Nakajima , Yuichi Harikane , Yuki Isobe , Yoshiaki Ono , Hiroya Umeda , Yechi Zhang

In recent years, significant growth in the amount of data available to astronomers has opened up the possibility to uncover fundamental correlations, linking the dust component of a galaxy to its star formation rate (SFR). In this paper, we…

Astrophysics of Galaxies · Physics 2022-02-23 Ciro Pappalardo , George J. Bendo , Mederic Boquien , Maarten Baes , Sebastien Viaene , Simone Bianchi , Jacopo Fritz

Galactic outflows provide important feedback effects to regulate the evolution of host galaxies. Two primary diagnostics of outflows are broad and/or blueshifted emission and absorption lines. Even though well-established methods exist to…

JWST observations have revealed a population of galaxies bright enough that potentially challenge standard galaxy formation models in the $\Lambda$CDM cosmology. Using a minimal empirical framework, we investigate the influence of…

Astrophysics of Galaxies · Physics 2023-08-30 Xuejian Shen , Mark Vogelsberger , Michael Boylan-Kolchin , Sandro Tacchella , Rahul Kannan