Null detection of 0.3-micron artificial grains in 1 m³ lunar regolith excludes Solar-type stars dispersing more than ~0.09 Earth masses of long-lived technomaterial over Galactic history.
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@doi [ ] 10.1111/j.1365-2966.2009.15167.x, http://adsabs.harvard.edu/abs/2009MNRAS.398..607V 398
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- method 4), and different dust conditions (Section 6.2.5). 3.1 The IllustrisTNG50 simulation Our emission-line predictions are based onIllustrisTNG50(here- afterTNG50), the highest-resolution volume of the publicly avail- ableIllustrisTNGsuite of cosmological simulations (Pillepich et al. 2018; Nelson et al. 2019a).TNG50was evolved with the moving-mesh codeArepo(Springel 2010) in a(51.7 cMpc) 3 vol- ume from𝑧=127to 0, with dark-matter and gas mass resolu- tions of𝑚 DM =4.5×10 5 M⊙ and𝑚 gas =8×10 4 M⊙, r
- dataset dashed line, which showcases the improvement in the quality of spectra with JWST/MIRI-MRS. The MRS spectra of IR20551 shows a combination of narrow lines,PAHemissionandsilicateabsorptionfeaturesat∼6.2𝜇mand∼9.7𝜇m.Thebottomfourpanelsshowthesamespectraasthetoprightpanel,butzoomed in on four different regions of the MRS spectra and the strong emission line features labelled. Rotational transitions of H2 (S(1)-S(8)) are detected, along with PAH and low-ionisation lines such as [Neii]. High ionisation
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JWST/NIRCam imaging and Keck/MOSDEF spectroscopy identify COSMOS-74706 as an unlensed barred spiral galaxy at z_spec=3.159, with the bar confirmed via residuals, ellipse fitting, and Fourier modes.
First JWST spectroscopy of GJ 504 b detects multiple molecules, retrieves atmospheric parameters including super-solar metallicity, and finds tentative support for planet-like formation.
TOI-837 b has a true obliquity of 25.9+7.5-6.3 deg, the first planet younger than 100 Myr with accessible ψ incompatible with an aligned orbit, favoring primordial disc torque followed by disc-driven migration.
Detection of a variable stratified UFO with velocities 0.1c and 0.3c, extreme mass outflow rates, and kinetic powers of 1-10% of bolometric luminosity in quasar WISSH13 at z=3.294.
First 2D Lyα RHD simulations show Lyman-alpha radiation pressure yields radiative forces of 2-16 times L_bol/c and force multipliers of 10-60, dominating other pre-supernova feedback in metal-poor environments.
3D GRMHD collapsar simulations initialized with toroidal fields demonstrate that an accretion-disk dynamo generates poloidal fields and launches variable, wobbling jets with LGRB-comparable power.
SOFIA observations provide the first experimental magnetic-dipole hyperfine constants for [13C II] and refined centroid frequency using astronomical data.
TopoFisher optimizes trainable filtrations, vectorizations, and compressors in persistent homology to maximize Fisher information, yielding higher information than fixed cosmological summaries and approaching neural baselines with far fewer parameters while generalizing better under simulator shifts
Dust grain size distributions evolve from large-grain dominated at high redshift to MRN-like at low redshift, driven primarily by shattering and ISM accretion after stars supply initial large grains, reproducing z=0 dust masses and Milky Way extinction properties.
First public GPU-accelerated pulse-profile modeling code for X-ray millisecond pulsars that delivers 10^3–10^4 speedups to 2–5 ms per evaluation at 10^{-3} relative accuracy and removes an interpolation bias in atmosphere tables.
The eRASS1 data release catalogs nearly 930,000 X-ray sources from the first six months of the eROSITA survey, increasing known sources by over 60% and resolving 20% of the 1-2 keV cosmic X-ray background.
EHT data show a 51.8 microarcsecond ring around Sgr A* consistent with the shadow of a 4 million solar mass Kerr black hole viewed at moderate inclination.
The JWST transmission spectrum of TOI-1231 b shows strong CH4 detection and moderate CO2 evidence, consistent with a deep H2-rich atmosphere and no distinct surface.
Native-resolution retrievals on 0.97-5.27 micron JWST spectra of VHS 1256 b find a ~79% cloud deck, solar-like metallicity and C/O, and depleted 18O in a partially cloudy disequilibrium atmosphere.
First mid-IR transmission spectrum of TOI-270 d shows molecular features with Bayesian evidence ln B = 2.8-5.3 and identifies candidate trace molecules from an agnostic search of 203 species.
Spatially resolved spectroscopy shows SDSS1335+0728 has a three-zone ionisation structure, optically thin dust, and sustained low-level nuclear activity for at least 1500 years, implying the Ansky event is a faint transient in an already accreting low-mass SMBH.
JWST/NIRSpec data on SN 2024uj reveal complex He I emission overlapping central Ca and O, plus CO and dust, favoring a thermonuclear origin from low-mass white dwarfs.
LRD host galaxies show average metallicity 0.08 Z_sun with narrow stable range, challenging pristine-gas formation models while ruling out typical local AGN.
Relativistic single-particle scattering cross sections for strong electromagnetic waves in strongly magnetized plasma are computed for arbitrary polarization and angle, showing strong suppression and sub-unity optical depth for quasi-parallel propagation.
One acceleration measurement equals ~10^5 phase-space measurements for local dark matter density estimation, with acceleration outperforming Jeans modeling in both equilibrium and perturbed Milky Way simulations.
XRISM velocity maps of Abell 3571 show subsonic gas motions and thermodynamic asymmetry consistent with early-phase sloshing from an off-axis minor merger with Abell 3572 as candidate perturber.
JWST phase curves of ZTFJ0038+2030 show inefficient heat redistribution (<10%) and nightside CO2 asymmetry in a tidally locked brown dwarf, yielding a system age of 7.5-8.8 Gyr and low common-envelope ejection efficiency.
Binary interactions and cluster dynamics boost PISN rates by up to 3x versus single stars, enabling constraints on stellar-wind mass loss and galaxy metallicity distributions.
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Constraints on Primordial Black Holes from Galactic Diffuse Synchrotron Emissions
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The Landscape of Composite Higgs Models
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