Solar and Stellar Astrophysics Papers of the Week

Abstract We present the largest statistical spectroscopic sample of radio quasars at 4.7 ≤ z ≤ 6.7 to date.

Its main carrier candidate is polycyclic aromatic hydrocarbon (PAH) molecules, which are more prevalent in high-metallicity environments. We present the first systematic study of the relationship between the PAH abundance and the UV attenuation bump in 49 galaxies at cosmic noon (1.5<z<2.7), and we examine its dependence on the stellar mass (M_*), star formation rate (SFR), and V-band optical depth (τ_V).

Abstract We identify a population of diluted early-type galaxies (ETGs) with gas-phase metallicities significantly below the local mass-metallicity relation.

We aim to slightly improve understanding of the radial and horizontal flows associated at mesogranular scales and supergranulation.

By redistributing gas and angular momentum, they can influence recent star formation, but their dominant effect on star-forming regions remains uncertain. We investigated how stellar bars affect the radial and azimuthal distributions of star-forming clumps and whether they modify the observed luminosities and sizes of individual clumps.

To investigate how DCN / DNC depends on the gas kinetic temperature, we observed the J=1-0 transitions of DCN, DNC, H 13 CN, HN^13C, HC^15N, and H^15NC toward 101 late-stage massive star-forming regions using the Yebes 40m telescope.

For the first time, we adopt a novel numerical method that combines magnetohydrodynamics with energetic particles incorporating feedback from nonthermal electrons to investigate electron acceleration and transport in solar flares.

For the heliosheath conditions considered here, we find that reconnection-driven acceleration is inefficient downstream of the termination shock, whereas reconnection near the heliopause can generate stronger compression and produce a power-law differential intensity spectrum $J(\varepsilon)\propto\varepsilon^{-5.4}$.

We report the discovery, validation, and characterization of 44 new symbiotic stars (SySts) accreting at the lowest detectable levels (Lacc =< 3 Lsun).

We present a new circular polarisation survey of approximately 100 white dwarfs selected as featureless DC stars and combine our measurements with previous observations.

Post-common-envelope evolution (CEE) circumbinary disks (CBDs) form when part of the ejected envelope remains bound and circularizes around the stripped core and its companion. Leveraging results of scale-free hydrodynamical simulations, we develop a framework to model the effect of such disks on subsequent binary evolution, and implement it in the population synthesis code COMPAS.

We present a wide-band, spatially resolved analysis of 19 nearby edge-on galaxies, combining LOFAR observations at 144 MHz with CHANG-ES VLA imaging at 1.575, 3.0, and 6.0 GHz, and hybrid H α +22  μ m star formation rate (SFR) maps.

In this study, we develop MP-DualNet, an end-to-end dual-branch deep learning framework for automated magnetopause detection from simulated SXI observations.

We present Very Large Telescope/X-shooter spectroscopy of seven Type I superluminous supernova (SLSN-I) host galaxies at z  = 0.15−0.51, exploiting the bright SLSN continua as down-the-barrel probes of the host interstellar medium.

We present the discovery and photometric study of a distant dwarf nova KSP-OT-201803a using BVI-band observation data obtained by using the KMTNet Supernova Program.

In this article, we report optical photometry and spectroscopy of SN,2025aedz, a rapidly post-peak declining SN IIP with a typical short plateau.

The FRB-PRS hosts differ dramatically from the general FRB host population: they do not follow the distribution of localized non-PRS FRB hosts, nor the star formation rate (SFR)-weighted or mass-weighted mock host distributions expected for the general star-forming galaxy population, instead occupying the extreme low-mass, high-specific star formation rate (sSFR), and low-metallicity end of host-galaxy parameter space. We compare these hosts with well-defined samples of hydrogen-poor superluminous supernovae (SLSNe-I), hydrogen-rich superluminous supernovae (SLSNe-II), and Type II core-collapse supernovae (CCSNe).

We present well-sampled multi-band imaging and low- to medium-resolution spectroscopic observations of the early-discovered Type~II supernova (SN)~2025dys.

We apply a multi-component spectral-modeling framework to JWST/NIRSpec PRISM spectra toward NGC 2024, obtaining adopted fits for 78 sources.