Št. zadetkov: 11
Izvirni znanstveni članek
Oznake:
star formation;imaging spectroscopy;high red-shift galaxies;
We present the first statistical investigation of spatially resolved emission-line properties in a sample of 63 low-mass galaxies at 4 ≤ z < 10 using James Webb Space Telescope (JWST)/NIRSpec Micro Shutter Assembly (MSA) data from the JWST Advanced Deep Extragalactic (JADES) survey, focusing on deep ...
Leto:
2024
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:
galaxies evolution;active galaxies;high-redshift galaxies;
We report the discovery of a z ∼ 7 group of galaxies that contains two little red dots (LRDs) just 3.3 kpc apart, along with three potential satellite galaxies, as part of the Canadian NIRISS Unbiased Cluster Survey (CANUCS). The spectral energy distributions (SEDs) of this LRD pair show evidence of ...
Leto:
2025
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 $\m ...
Leto:
2025
Vir:
Fakulteta za matematiko in fiziko (UL FMF)
Izvirni znanstveni članek
Oznake:
astrofizika;galaksije;medzvezdni prah;ekstinkcija;astrophysics;galaxies;dust;extinction;
Context. A large variety of dust attenuation and/or extinction curves has been observed in high-redshift galaxies. Some studies investigated their correlations with fundamental galaxy properties, which yielded mixed results. These variations are likely driven by underlying factors such as the intrin ...
Leto:
2025
Vir:
Fakulteta za matematiko in fiziko (UL FMF)
Izvirni znanstveni članek
Oznake:
gravitational lensing;astrophysics of galaxies;high-redshift galaxies;
Context. Strong gravitational lensing in galaxy clusters has become an essential tool in astrophysics, as it allows one to directly probe the dark matter distribution and study magnified background sources. The precision and reliability of strong lensing models rely heavily on the number and quality ...
Leto:
2025
Vir:
Fakulteta za matematiko in fiziko (UL FMF)
Izvirni znanstveni članek
Oznake:
razvoj galaksij;pregledi neba;fotometrija;spektroskopija;jate galaksij;galaxy evolution;sky surveys;photometry;spectroscopy;galaxy clusters;
We present the first data release of the Canadian NIRISS Unbiased Cluster Survey (CANUCS), a JWST Cycle 1 GTO program targeting five lensing clusters and flanking fields in parallel (A370, MACS0416, MACS0417, MACS1149, and MACS1423; survey area ∼100 arcmin$^2$), with NIRCam imaging, NIRISS slitless ...
Leto:
2026
Vir:
Fakulteta za matematiko in fiziko (UL FMF)