Št. zadetkov: 14
Izvirni znanstveni članek
Oznake:
galaxies evolution;high-redshift galaxies;reionization;
JWST catches the assembly of a z ~ 5 ultra-low-mass galaxy
Leto:
2023
Vir:
Fakulteta za matematiko in fiziko (UL FMF)
Izvirni znanstveni članek
Oznake:
high-redshift galaxies;gravitational lensing;reionization;active galaxies;
We present galaxy MACS0416-Y1 at z$_{spec}$ = 8.312 as observed by the CAnadian NIRISS Unbiased Cluster Survey. MACS0416-Y1 has been shown to have extreme dust properties; thus, we study the physical properties and star formation histories of its resolved components. Overall, we find that MACS0416-Y ...
Leto:
2024
Vir:
Fakulteta za matematiko in fiziko (UL FMF)
Izvirni znanstveni članek
Oznake:
astrofizika;zgodnje vesolje;galaksije;supermasivne črne luknje;astrophysics;early universe;galaxies;supermassive black holes;
Little red dots (LRDs) are a high redshift galaxy population. Despite their high number densities, their nature is still uncertain. Here we present CANUCS-LRD-z8.6, a spectroscopically confirmed little red dot at a spectroscopic redshift of $z_{\mathrm{spec}}=8.6319$, hosting an active galactic nucl ...
Leto:
2025
Vir:
Fakulteta za matematiko in fiziko (UL FMF)
Izvirni znanstveni članek
Oznake:
astrofizika;galaksije;spektroskopija;aktivna galaktična jedra;astrophysics;galaxies;spectroscopy;active galactic nucleus;
We present a spectroscopic analysis of a broad-line active galactic nucleus (AGN) selected as a little red dot (LRD) at z = 5.3 behind the Bullet cluster (Bz5.3) based on JWST/NIRCam and NIRSpec data. The detection of strong Fe II, O I, and Ca II triplet emission lines, along with the evidence of br ...
Leto:
2025
Vir:
Fakulteta za matematiko in fiziko (UL FMF)
Izvirni znanstveni članek
Oznake:
astrofizika;galaksije z velikim rdečim premikom;medzvezdni prah;fotometrija;astrophysics;high-redshift galaxies;interstellar dust;photometry;
We present a sample of 110 high-redshift (z > 7.5) galaxies from the CANUCS and Technicolor surveys, showcasing photometry in every wide- and medium-band NIRCam filter in addition to ancillary Hubble Space Telescope data sampling 0.4–5 $\mu$m (22 JWST bands out of 29 bands total). Additionally, 47 ( ...
Leto:
2025
Vir:
Fakulteta za matematiko in fiziko (UL FMF)
Izvirni znanstveni članek
Oznake:
galaksije;gravitacijsko lečenje;spektroskopija;fotometrija;galaxies;gravitational lensing;spectroscopy;photometry;
We present measurements of stellar population properties of a newly discovered, spectroscopically confirmed, $z=11.10^{+0.11}_{-0.26}$, gravitationally lensed galaxy, using JWST NIRSpec PRISM spectroscopy and NIRCam imaging. The arc is highly magnified by the Bullet Cluster (magnification factor $\m ...
Leto:
2025
Vir:
Fakulteta za matematiko in fiziko (UL FMF)
Izvirni znanstveni članek
Oznake:
high redshift galaxies;reionization;intergalactic medium;
We present a new analytical model for the attenuation to Epoch of Reionization (EoR) galaxies by proximate neutral hydrogen gas. Many galaxy spectra in the EoR taken by JWST have shown a flux deficit at wavelengths just redward of the Lyman break, and this has been regarded as resulting from Lyα dam ...
Leto:
2025
Vir:
Fakulteta za matematiko in fiziko (UL FMF)
Izvirni znanstveni članek
Oznake:
gravitational lensing;astrophysics of galaxies;high-redshift galaxies;
Context. Strong gravitational lensing in galaxy clusters has become an essential tool in astrophysics, as it allows one to directly probe the dark matter distribution and study magnified background sources. The precision and reliability of strong lensing models rely heavily on the number and quality ...
Leto:
2025
Vir:
Fakulteta za matematiko in fiziko (UL FMF)
Izvirni znanstveni članek
Oznake:
high-redshift galaxies;gravitational lensing;reionization;
We present measurements of stellar populations properties of a $z$ = 9.1 gravitationally lensed galaxy MACS1149-JD1 using deep James Webb Space Telescope NIRISS slitless spectroscopy as well as NIRISS and NIRCam imaging from the CAnadian NIRISS Unbiased Cluster Survey (CANUCS). The galaxy is split i ...
Leto:
2024
Vir:
Fakulteta za matematiko in fiziko (UL FMF)
Izvirni znanstveni članek
Oznake:
razvoj galaksij;pregledi neba;fotometrija;spektroskopija;jate galaksij;galaxy evolution;sky surveys;photometry;spectroscopy;galaxy clusters;
We present the first data release of the Canadian NIRISS Unbiased Cluster Survey (CANUCS), a JWST Cycle 1 GTO program targeting five lensing clusters and flanking fields in parallel (A370, MACS0416, MACS0417, MACS1149, and MACS1423; survey area ∼100 arcmin$^2$), with NIRCam imaging, NIRISS slitless ...
Leto:
2026
Vir:
Fakulteta za matematiko in fiziko (UL FMF)