Clay weekly context brief for the Astro category (ISO week 2026-W41).

Clay tracks publications from the Astro feed list. Below are recent items from this category, each with its source and a short description of what the publication covers when one is available in the source feed.

Recent publications:
1. Robust Bayesian non-linear pulsar timing and noise analysis using a sequential data-tempered ensemble sampler
   Source: astro-ph.HE (High Energy Astrophysical Phenomena)
   Link: https://arxiv.org/abs/2610.02737
   We develop a sequential ensemble MCMC scheme for Bayesian pulsar timing and noise analysis that uses data size as the tempering parameter.
2. Quantitative Links between Formation and Atmospheric Composition for Giant Planets
   Source: astro-ph.EP (Earth and Planetary Astrophysics)
   Link: https://arxiv.org/abs/2608.23682
   Precise atmospheric abundances of giant exoplanets are becoming increasingly prevalent and there is a need to systematically convert these measurements into metrics that inform us about the planets' accretion history.
3. $\xi R\phi^2$ non-minimal coupling, and the long range gravitational potential for different spin fields from 2-2 scattering amplitudes
   Source: astro-ph.CO (Cosmology and Nongalactic Astrophysics)
   Link: https://arxiv.org/abs/2604.06062
   In this paper, we investigate the long range gravitational effect of curvature-scalar field non-minimal coupling in the form of $\xi R \phi^2$, in the perturbative quantum gravity framework.
4. Non-adiabatic Effect on Convective Mode
   Source: astro-ph.SR (Solar and Stellar Astrophysics)
   Link: https://arxiv.org/abs/2601.12756
   The systematic analysis of non-adiabatic effect on convective mode has been conducted using wave energy relation.
5. Supernovae Ia ejecta velocities and host galaxy environments: the role of survey-selection effects
   Source: astro-ph.GA (Astrophysics of Galaxies)
   Link: https://arxiv.org/abs/2608.21603
   The origin of the near-maximum-light Si II $\lambda$6355 velocity diversity among supernovae Ia (SNe Ia) remains uncertain.
6. Mesoscale Turbulence in Type Ia Supernova Deflagrations II. Evidence for Fuel Preheat Due to Flame Thermal Expansion from Lagrangian Analysis
   Source: astro-ph.HE (High Energy Astrophysical Phenomena)
   Link: https://arxiv.org/abs/2610.02677
   Thermonuclear flame fronts in Type Ia supernovae develop hydrodynamic instabilities that generate turbulent mesoscale flow and substantial local thermodynamic variability.
7. Plato benchmark stars I. The initial benchmark sample
   Source: astro-ph.EP (Earth and Planetary Astrophysics)
   Link: https://arxiv.org/abs/2610.02956
   The ESA PLATO mission aims to detect and characterise Earth-size exoplanets orbiting bright, late-type stars using high-precision photometry and asteroseismology.
8. Discovering Substellar Dark Matter Halos with Astrometric Weak Lensing of Multiply Imaged Quasars
   Source: astro-ph.CO (Cosmology and Nongalactic Astrophysics)
   Link: https://arxiv.org/abs/2608.27557
   We propose time-domain astrometric weak lensing of multiply imaged quasars as a probe of substellar dark matter (DM) halos.
9. First strength measurements of low-energy resonances in the $^{45}$Sc($p,\gamma$)$^{46}$Ti reaction and its astrophysical implications
   Source: astro-ph.SR (Solar and Stellar Astrophysics)
   Link: https://arxiv.org/abs/2610.03284
   The $^{45}$Sc($p,\gamma$)$^{46}$Ti reaction plays an important role in both hydrostatic and explosive nucleosynthesis.
10. Probing the molecular gas content of galaxies in an over-dense group at z~0.7: A test case for environmental quenching
   Source: astro-ph.GA (Astrophysics of Galaxies)
   Link: https://arxiv.org/abs/2606.26320
   We investigated the impact of group environment on molecular gas reservoirs at an intermediate redshift by observing the CO(2-1) emission from the galaxy group COSMOS-Gr30 at $z \sim 0.7$ with the Institut de Radioastronomie Millimetrique (IRAM) NOrthern Extended Millimeter Array (NOEMA) and 30m telescope.
11. Separating the Optical to Near-Infrared Light of AGN and Their Host Galaxies
   Source: astro-ph.HE (High Energy Astrophysical Phenomena)
   Link: https://arxiv.org/abs/2610.02465
   The properties of galaxies that host active galactic nuclei (AGNs) offer clues to the conditions that enable accretion onto supermassive black holes.
12. The 200-300 GHz Survey for 18 Class II Disks in the Ophiuchus Star-Forming Complex
   Source: astro-ph.EP (Earth and Planetary Astrophysics)
   Link: https://arxiv.org/abs/2610.02619
   We measured the 198-310 GHz flux densities of 18 Class II protoplanetary disks in the Ophiuchus star-forming complex using the Submillimeter Array (SMA).
13. Cosmology with Multi-Wavelength Line Intensity Mapping Synergies in the SKAO Era
   Source: astro-ph.CO (Cosmology and Nongalactic Astrophysics)
   Link: https://arxiv.org/abs/2606.30224
   Line intensity mapping (LIM) has emerged as a powerful tool for surveying the large-scale structure of the Universe across cosmic time by measuring spatial fluctuations in the cumulative emission of spectral lines from unresolved sources or the intergalactic medium.
14. Toward Resolution Convergence for Star Formation and Galactic Winds in Galaxy Simulations
   Source: astro-ph.SR (Solar and Stellar Astrophysics)
   Link: https://arxiv.org/abs/2609.34336
   The predictive power of hydrodynamic simulations of galaxies is often hampered by the resolution dependence of sub-grid models for star formation (SF) and stellar feedback.
15. Diverse Histories and Common Origins of Nitrogen-enhanced JWST Galaxies
   Source: astro-ph.GA (Astrophysics of Galaxies)
   Link: https://arxiv.org/abs/2606.18334
   Early JWST spectra revealed galaxies with a strong nitrogen excess challenging galactic chemical evolution models.
16. Learning Approximate Isometric Embeddings for Efficient Template Placement
   Source: astro-ph.HE (High Energy Astrophysical Phenomena)
   Link: https://arxiv.org/abs/2610.02448
   The sphere covering problem has broad applications in science however, exact solutions are computationally infeasible on curved, high-dimensional manifolds because distances must be evaluated using a position-dependent metric.
17. Post-Training Quantization of Autoregressive Weather Models
   Source: astro-ph.EP (Earth and Planetary Astrophysics)
   Link: https://arxiv.org/abs/2610.02511
   Advancements in high-resolution numerical weather prediction (NWP) and data assimilation (DA) have shaped the developments in deep learning (DL) architectures emulating atmospheric dynamics.
18. Dark Energy Survey Year 6 Results: Galaxy-galaxy lensing
   Source: astro-ph.CO (Cosmology and Nongalactic Astrophysics)
   Link: https://arxiv.org/abs/2601.15175
   We present galaxy--galaxy lensing (GGL) measurements from the full six years of data from the Dark Energy Survey (DES Y6), covering $4031\,\mathrm{deg}^2$ and used in the DES Y6 $3\times2$pt cosmological analysis.
19. The origin of dispersion in the wind mass-loss rate--luminosity relation of massive O stars
   Source: astro-ph.SR (Solar and Stellar Astrophysics)
   Link: https://arxiv.org/abs/2610.03431
   Stellar winds of hot stars are accelerated by the radiative force that mainly comes from the line transitions of heavy elements.
20. A New Record Census of Dwarf AGN and a Bimodal $M_{\rm BH}$-$M_{\star}$ Scaling Relation with DESI DR1
   Source: astro-ph.GA (Astrophysics of Galaxies)
   Link: https://arxiv.org/abs/2606.02699
   Using the first spectroscopic data release from the Dark Energy Spectroscopic Instrument (DESI DR1), we conduct the largest systematic search for active galactic nuclei (AGN) signatures in $\approx$1.7 million low-redshift ($0.001 \le z \le 0.45$) line-emitting galaxies.

Sources in this brief: astro-ph.CO (Cosmology and Nongalactic Astrophysics); astro-ph.EP (Earth and Planetary Astrophysics); astro-ph.GA (Astrophysics of Galaxies); astro-ph.HE (High Energy Astrophysical Phenomena); astro-ph.SR (Solar and Stellar Astrophysics).
Selected 20 of 74 available items for this weekly brief.