Discovery and characterization of the highest-redshift barred spiral galaxy candidate at z=5.102, with bar length ~4.5 kpc, stellar mass 10^10.45 solar masses, SFR 144 solar masses per year, and evidence for AGN and interaction.
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Four faint red point sources near critical curves in JWST images of Abell S1063 are interpreted as extremely magnified AGB stars and a yellow supergiant at cosmic noon.
A deeply embedded Class I protostar in NGC 7538 underwent an FUor-like outburst lasting years, detected through WISE mid-IR light curves showing rapid rise, peak, and slow fade.
JWST difference imaging from COSMOS-Web and PRIMER has yielded 68 high-redshift supernovae including a core-collapse event at z>3 and a Type Ia at z>2, demonstrating the feasibility of wide-area time-domain searches in the early universe.
Galaxy interactions at z~5 trigger star-formation bursts responsible for ~42% of stellar mass growth, half from new stars formed during the interaction.
JWST, Subaru, and ALMA observations of HH 270 identify a new collimated jet closer to the source and show interactions between the shock-excited jet and the molecular outflow.
UV-bright companions to Little Red Dots provide Lyman-Werner fluxes of J21 ~ 10^2.5-10^5 that can suppress H2 cooling and enable direct collapse to massive black holes.
A sample of 36 spectroscopically confirmed LRDs shows broad-line detections in >90%, spectral variety including Balmer breaks and blackbody fits, H-alpha to 5100A continuum correlation, no redshift evolution, declining space density toward z~2 opposite normal AGNs, and clustering in ~10^11 solar mas
Blind MUSE search detects 156 LAEs at 2.9<z<6.7 with 34 C IV and 14 Mg II absorber associations, indicating low-mass galaxies enrich the CGM.
SRGA J115215.0-510656 is a long-period U Gem-type dwarf nova with eclipses, a K3 secondary, and disc wind signatures in its outburst spectra.
Neo, a cGAN, super-resolves HSC images to HST-like quality and improves galaxy morphological parameter accuracy by factors of 2-10.
HST-resolved SEDs for seven nearby BAT AGN show host-galaxy contamination biases accretion-disk temperature by ~2 eV, extinction by ~2.2 mag, bolometric luminosity by ~0.57 dex, and X-ray bolometric corrections by ~0.66 dex relative to Swift/UVOT data.
A two-stage deep learning pipeline (HT-LCNN detector + VGG6 classifier) trained on augmented real and simulated data detects streaks in OmegaCAM frames with F1 > 0.95 on test sets and 0.99 precision on real 2023 data, uncovering 25,335 streaks including >20% uncatalogued objects across 1.2 million f
Late-time JWST/NIRCam data on GRB 250702B show a high-mass dusty host and possible ~3-sigma transient detections in two bands suggesting light-curve flattening.
Hector IFS and Chandra data indicate a low-luminosity AGN contributes to extended LINER emission in galaxy C901005481609968 despite weak traditional AGN indicators.
Mock CSST images yield 95% completeness limits of 26.3-28.5 mag for point sources and 24.4-27.1 mag for galaxies, with fainter objects showing systematic overestimates in magnitude, size, and surface brightness and underestimates in Sersic index and axis ratio.
Globular cluster deficits in several Coma galaxies, revealed by Voronoi density maps and asymmetry tests, provide evidence for environmental stripping.
Rest-frame 6-8um MIRI luminosity provides broken power-law SFR calibrations with 0.2-0.3 dex scatter and UV+IR composites at 0.15 dex, supporting robust use above log M* ~9 up to z~3.
Student teams at an ESO school obtained spectroscopic and photometric data on binary stars and blue stragglers, confirming alignment due to tides, cluster membership via abundances, delta Scuti pulsation, and a binary central star in a planetary nebula.
citing papers explorer
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An FUor-like Outbursting Class I Protostar in NGC 7538
A deeply embedded Class I protostar in NGC 7538 underwent an FUor-like outburst lasting years, detected through WISE mid-IR light curves showing rapid rise, peak, and slow fade.
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A Study of HH 270 with the James Webb Space Telescope
JWST, Subaru, and ALMA observations of HH 270 identify a new collimated jet closer to the source and show interactions between the shock-excited jet and the molecular outflow.
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SRGA J115215.0$-$510656: an unusual long-period eclipsing dwarf nova with disc wind signatures
SRGA J115215.0-510656 is a long-period U Gem-type dwarf nova with eclipses, a K3 secondary, and disc wind signatures in its outburst spectra.
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The Wonderful World of Binary Stars
Student teams at an ESO school obtained spectroscopic and photometric data on binary stars and blue stragglers, confirming alignment due to tides, cluster membership via abundances, delta Scuti pulsation, and a binary central star in a planetary nebula.