A lens model from Gaia DR3 and HST data combined with a Bayesian test on Chandra observations constrains the X-ray emission origin in lensed quasar J0659 to a 0.020 × 0.010 arcsec ellipse offset 0.014 arcsec from the optical source at 1σ.
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New isotopic data from presolar SiC grains are best reproduced by hydrodynamic models of CO novae, establishing them as the primary source for 1-2% of such grains.
X-ray polarization of 13.1% ± 3.0% is detected from LS I +61 303 at 4.2 sigma, with EVPA alignment to the binary axis depending on which set of orbital elements is adopted.
Massive galaxies at z>3.5 assembled stars earlier than theoretical models predict and exhibit gray dust attenuation, especially at the highest masses.
Post-perihelion UVES spectra of interstellar comet 3I/ATLAS reveal elevated NiI and FeI production explained by direct sublimation of Ni(CO)4 and Fe(CO)5 from subsurface layers, with a transient heat source accounting for the pre-perihelion Ni excess.
Deep Chandra data confirms three cold fronts in RXJ2014.8-2430 with widths indicating suppressed diffusion and identifies a concave structure consistent with either a Kelvin-Helmholtz instability or a powerful AGN cavity of radius 200-330 kpc.
BAGPIPES fitting of 9289 massive quiescent galaxies shows most SFHs rise gradually then quench in 1-2 Gyr, with faster quenching at z>1 and slower at z<1, interpreted as multiple AGN feedback and gas-supply mechanisms.
HE 1237-2252 exhibits a changing-look event driven by intrinsic accretion-rate variations, revealing a two-component broad-line region consisting of virialized gas at ~27 light-days and disk emission at larger radii.
Spectra of the western eROSITA bubbles reveal two uniform components at 0.60 keV and 0.21 keV with sub-solar abundances, plus a geometrical model constraining horizontal size to ~6 kpc but leaving vertical extent uncertain.
Atmospheric retrievals yield C/O = 0.57±0.01, [M/H] = 0.18±0.05, and 12CO/13CO ≈ 95 for 2MASS J0249-0557 c, matching benchmark brown dwarfs and favoring star-like gravitational collapse over disk accretion.
Simulations tie the deep-mantle primordial neon reservoir to an initial embryo mass of ~0.3 Earth masses assembled during solar-nebula dispersal.
Asymmetric neutrino emissions produce proton-rich ejecta in one hemisphere and neutron-rich ejecta in the other, with asymmetries of 30% or more overproducing elements heavier than zinc relative to solar abundances.
X-ray data from V834 Tau, LQ Hya, and BY Dra show two-temperature quiescent coronae with iron depletion and six superflares, with recurrent events on LQ Hya suggesting stable magnetic structures.
A single C program is formally proven to harbor countably infinitely many distinct, CVE-assignable vulnerabilities, implying the set of all software vulnerabilities is infinite.
Lower BNS merger rates from GWTC-4 data produce tensions of factors 3.6-18 with SGRB rates, 0.9-4.1 with r-process rates, and 2.3-5.1 with Galactic DNS rates.
New 17O+α and 22Ne+α rates increase weak s-process yields by tens of times in Z=10^{-3} stars of 15-30 solar masses.
New non-LTE abundances for three Bootes I stars show an alpha-element transition at [Fe/H] between -3 and -2, interpreted as the onset of type Ia supernova contributions in this ultra-faint dwarf galaxy.
RX J1553.0+4457 is a detached post-common-envelope binary whose light curve shows ellipsoidal modulation from a tidally distorted M dwarf, with magnetic activity producing flares and declining X-ray emission, consistent with a white dwarf plus M dwarf SED and no clear accretion disk.
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Constructing Earth Formation History Using Deep Mantle Noble Gas Reservoirs
Simulations tie the deep-mantle primordial neon reservoir to an initial embryo mass of ~0.3 Earth masses assembled during solar-nebula dispersal.