Astrophysics papers — 2026-08-13

Optical development of the BISOU breadboard. BISOU (Balloon Interferometer for Spectral Observations of the primordial... X-ray signals converted from high-frequency gravitational waves emitted by spinning light primordial black hole dark matter. The paper investigates the detectability of high-frequency gravitational waves... FOSSIL's preliminary thermal architecture. FOSSIL (FTS fOr CMB Spectral diStortIon expLoration) is a proposed ESA M8... An Evolving Leptonic Jet Model for Delayed Radio Flares in Neutrino Blazars. The jets of blazar active galactic nuclei (AGN) are promising sites of hadron... ALMA observations of pre-JWST z 10 galaxy candidates: A CO(J = 9-8) line from a ULIRG at z = 2.54 and revisit of the photometric redshifts with JWST photometry. This paper presents ALMA observations targeting the [O iii] 88 μm line for six... Cosmography with DESI-DR1 Cosmic Chronometers: Direct H(z) measurements from Luminous Red Galaxy ages. This paper presents a new, model-independent estimate of the expansion history... Radio Properties of Narrow-Line and Broad-Line Seyfert 1 Galaxies. The paper investigates the radio properties of narrow-line Seyfert 1 (NLS1) and... The atmospheric vertical structure of Uranus and Neptune from thermochemical models: the impact of model assumptions. The atmospheric vertical structure of Uranus and Neptune from thermochemical... Stellar tidal systematics in apsidal-motion searches for circumbinary planets: CH Ind and SW CMa. This paper re-evaluates two evolved, double-lined eclipsing binaries from the... Gal3D: Superellipsoid Modeling of Radial 3D Galaxy Structure in IllustrisTNG and EAGLE Simulations. The paper presents Gal3D, a framework that reconstructs smoothed density fields... Cosmic Structures in CDM and SIDM. This review paper examines the standard Λ Cold Dark Matter (ΛCDM) model's... Temperature effects on white dwarfs in modified gravity. In this article we analyze the effects of a finite temperature equation of... X-ray Flaring and Variability in NGC 1275, the Heart of the Perseus Cluster. This paper reports on X-ray monitoring of NGC 1275, the central galaxy of the... Are Hot Jupiters Tidally Disrupted During Stellar Main Sequence?. Once hot Jupiters (HJs) reach their very close orbits, they are expected to... Automatic detection of fast oscillations of dark matter scalar field and updated cosmological constraints on QCDM. The paper introduces a new technique for automatically detecting the onset of... Strict Limits on Helium Absorption from LHS 1140 b from Four JWST NIRISS Transits. Based on the paper, here is the summary: This paper analyzes four archival... Scalar induced gravitational waves as probes of dark QCD. This paper investigates scalar induced gravitational waves (SIGWs) as probes of... The Production of Electron-Capture Elements in Thermonuclear Supernovae: Theory vs. Observations. Type Ia supernovae (SNe Ia) explosively destroy C/O white dwarfs (WDs) in... Photospheric Kelvin--Helmholtz Vortices as Possible Drivers of Coronal Heating: Implications of the DKIST Observations. The Daniel K. Waterfall-modulated-attractors. The paper "Waterfall-modulated α-attractors" by Renata Kallosh, Andrei Linde,... Radio Monitoring of Classical Novae using the ASKAP Variable and Slow Transients Survey. We present a search for radio emission from classical novae at 887.5 MHz using... Forecast for the detectability of patchy hydrogen reionization in WEAVE-QSO measurements of the Lyman- forest power spectrum at redshift. The paper presents the first detailed forecasts for the detectability of patchy... Revisiting gravitational instability in protostellar discs with improved radiative cooling models. The paper "Revisiting gravitational instability in protostellar discs with... JWST Detects a Dusty AGB-like Source Before the Type Ia-CSM Supernova 2026sqf. JWST Detects a Dusty AGB-like Source Before the Type Ia-CSM Supernova 2026sqf... Cross-spectral Analysis of the Type-C Quasi-periodic Oscillation Shoulder Component in GX 339-4. We revisit Rossi X-ray Timing Explorer (RXTE) observations of GX 339−4 during... TIC 433545934: The first 2+2 type doubly eclipsing binary with extra, mutual eclipses. TIC 433545934 is identified as the first known 2+2-type doubly eclipsing... No Helium Detected in LHS 1140 b from Four JWST NIRISS/SOSS Transits. This paper presents four JWST NIRISS/SOSS transit observations of the exoplanet... Vector Perturbations in Ghost-Free Quasidilaton Massive Gravity. We study transverse vector perturbations in ghost-free extended quasidilaton... Higher-Order Analytical Expansion of Thawing Dark Energy with an Exponential Potential. Motivated by recent DESI results suggesting dynamical dark energy, we... Long-term 3+1 simulations of primordial black hole formation during radiation domination. This paper develops an efficient three-dimensional numerical-relativity... Widefield Arecibo Virgo Extragalactic Survey: II. Characterizing the HI properties and environment of the WAVES South region. The paper presents the results from the WAVES South region of the Virgo... Complex Energy-Dependent Behaviour of Quasi-Periodic Oscillation Observed in GRS 1915+105. The paper presents a detailed energy-resolved analysis of quasi-periodic... Chondrule formation in the outer disk from the primary three-dimensional chemical composition of CM chondrules. The paper investigates the major, minor, and trace element compositions of 66... The low luminosity end of Galactic HMXBs with eROSITA: Establishing a luminosity floor for accreting BeXRBs. We present a first look at the Galactic population of heretofore known HMXBs as... Differential Reddening and Extinction Law Analyses of Galactic Open Clusters. This paper presents a homogeneous, member-based characterization of extinction... Optical concept model of the future cosmology project BISOU. We present an optical analysis of BISOU (Balloon Interferometer for Spectral... The Most Probable Outer Density Profile from Excursion Set Theory. The paper "The Most Probable Outer Density Profile from Excursion Set Theory"... Elemental Composition Evolution during the 2024 September 30 Solar Eruption: A Comparison of Hot and Cool Plasma Components with Solar Orbiter/SPICE, Hinode/EIS, and Chandrayaan-2/XSM. The paper presents novel observations from Solar Orbiter SPICE and EUI,... The sensitivity of TESS to transiting planets in TOIs with close-in stellar companions. The study quantifies how the presence of close-in stellar companions impacts... AT 2024qfm: a luminous fast blue optical transient at a redshift of z = 0.2267 identified by Lasair-ZTF. AT 2024qfm is a luminous fast blue optical transient (LFBOT) discovered at a... Titanium Oxide Absorption as a Proxy to Detect Long term Variation and Activity Cycle in Proxima Centauri. The paper introduces a method to detect long-term stellar activity cycles in...

The papers

• X-ray signals converted from high-frequency gravitational waves emitted by spinning light primordial black hole dark matter — The paper investigates the detectability of high-frequency gravitational waves (GWs) originating from the superradiance of light primordial black hole (PBH) dark matter, specifically through their conversion into X-ray photons in the Galactic magnetic field.
• Optical development of the BISOU breadboard — BISOU (Balloon Interferometer for Spectral Observations of the primordial Universe) is an astronomical balloon-borne pathfinder developed as part of a preparatory study for a future space mission aimed at measuring spectral distortions of the cosmic microwave background (CMB).
• FOSSIL's preliminary thermal architecture — FOSSIL (FTS fOr CMB Spectral diStortIon expLoration) is a proposed ESA M8 mission designed to measure the spectral distortions monopole of the Cosmic Microwave Background (CMB) with a sensitivity three orders of magnitude beyond the COBE/FIRAS legacy measurement.
• ALMA observations of pre-JWST z 10 galaxy candidates: A CO(J = 9-8) line from a ULIRG at z = 2.54 and revisit of the photometric redshifts with JWST photometry — This paper presents ALMA observations targeting the [O iii] 88 μm line for six z 10 galaxy candidates selected with the Hubble Space Telescope and the Spitzer Space Telescope.
• Are Hot Jupiters Tidally Disrupted During Stellar Main Sequence? — Once hot Jupiters (HJs) reach their very close orbits, they are expected to experience orbital decay due to tidal interactions with their host star.
• Photospheric Kelvin--Helmholtz Vortices as Possible Drivers of Coronal Heating: Implications of the DKIST Observations — The Daniel K. Inouye Solar Telescope (DKIST) has resolved Kelvin–Helmholtz (KH) vortices at photospheric magnetic-flux boundaries with a characteristic wavelength of 65 km.
• Waterfall-modulated alpha-attractors — The paper "Waterfall-modulated α-attractors" by Renata Kallosh, Andrei Linde, and Yusuke Yamada studies single-field inflationary models that incorporate waterfall features inspired by hybrid inflation.
• Gal3D: Superellipsoid Modeling of Radial 3D Galaxy Structure in IllustrisTNG and EAGLE Simulations — The paper presents Gal3D, a framework that reconstructs smoothed density fields from particle data and quantifies the radial 3D structure of simulated galaxies by fitting superellipsoids to iso-density surfaces.
• Cross-spectral Analysis of the Type-C Quasi-periodic Oscillation Shoulder Component in GX 339-4 — We revisit Rossi X-ray Timing Explorer (RXTE) observations of GX 339−4 during the rising phase of its 2006/2007 outburst and apply a joint power-density-spectrum (PDS)–cross-spectrum (CS) decomposition to the type-C quasi-periodic oscillation (QPO) region.
• Temperature effects on white dwarfs in modified gravity — In this article we analyze the effects of a finite temperature equation of state on the equilibrium structure of white dwarfs in massive Brans-Dicke theory as well as the symmetron and dilaton screening mechanisms.
• Vector Perturbations in Ghost-Free Quasidilaton Massive Gravity — We study transverse vector perturbations in ghost-free extended quasidilaton massive gravity without a quasidilaton kinetic term, in the presence of minimal matter.
• An Evolving Leptonic Jet Model for Delayed Radio Flares in Neutrino Blazars — The jets of blazar active galactic nuclei (AGN) are promising sites of hadron acceleration and subsequent neutrino production, owing to their extreme intrinsic power and high radiation density.
• Scalar induced gravitational waves as probes of dark QCD — This paper investigates scalar induced gravitational waves (SIGWs) as probes of a dark QCD crossover.
• Long-term 3+1 simulations of primordial black hole formation during radiation domination — This paper develops an efficient three-dimensional numerical-relativity framework for simulating primordial black-hole (PBH) formation from superhorizon curvature perturbations in a radiation-dominated Universe.
• Stellar tidal systematics in apsidal-motion searches for circumbinary planets: CH Ind and SW CMa — This paper re-evaluates two evolved, double-lined eclipsing binaries from the 27 non-transiting circumbinary-planet candidates reported by Thornton et al. (2026), which were identified from excess apsidal motion in TESS eclipsing-binary timings.
• X-ray Flaring and Variability in NGC 1275, the Heart of the Perseus Cluster — This paper reports on X-ray monitoring of NGC 1275, the central galaxy of the Perseus Cluster, using data from the Neil Gehrels Swift Observatory taken over nearly 20 years (2007–2026).
• Radio Properties of Narrow-Line and Broad-Line Seyfert 1 Galaxies — The paper investigates the radio properties of narrow-line Seyfert 1 (NLS1) and broad-line Seyfert 1 (BLS1) galaxies, using large samples compiled from the Sloan Digital Sky Survey (SDSS).
• JWST Detects a Dusty AGB-like Source Before the Type Ia-CSM Supernova 2026sqf — JWST Detects a Dusty AGB-like Source Before the Type Ia-CSM Supernova 2026sqf Context. Supernova (SN) 2026sqf recently appeared in the nearby face-on spiral galaxy NGC 3310 and has shown signs of strong interaction with a circumstellar medium (CSM).
• Radio Monitoring of Classical Novae using the ASKAP Variable and Slow Transients Survey — We present a search for radio emission from classical novae at 887.5 MHz using data from the Australian SKA Pathfinder Variable And Slow Transient (VAST) survey.
• Automatic detection of fast oscillations of dark matter scalar field and updated cosmological constraints on QCDM — The paper introduces a new technique for automatically detecting the onset of rapid oscillations in scalar field dark matter and implements it in the Boltzmann solver CLASS.
• The Production of Electron-Capture Elements in Thermonuclear Supernovae: Theory vs. Observations — Type Ia supernovae (SNe Ia) explosively destroy C/O white dwarfs (WDs) in multiple stellar systems.
• Strict Limits on Helium Absorption from LHS 1140 b from Four JWST NIRISS Transits — Based on the paper, here is the summary: This paper analyzes four archival transits of the exoplanet LHS 1140 b, observed with the NIRISS instrument on JWST between December 2023 and July 2026, to search for evidence of metastable helium absorption in the planet's atmosphere.
• No Helium Detected in LHS 1140 b from Four JWST NIRISS/SOSS Transits — This paper presents four JWST NIRISS/SOSS transit observations of the exoplanet LHS 1140 b, obtained between 2023 and 2026, to search for the metastable helium triplet at 1.0833 µm. The study was motivated by a ground-based detection of helium absorption reported by C.
• Higher-Order Analytical Expansion of Thawing Dark Energy with an Exponential Potential — Motivated by recent DESI results suggesting dynamical dark energy, we investigate the thawing scenario in quintessence with an exponential potential, V = V0 e−λϕ/mpl, by analytically expanding the deviation of the equation of state parameter wϕ from −1 in powers of λ.
• TIC 433545934: The first 2+2 type doubly eclipsing binary with extra, mutual eclipses — TIC 433545934 is identified as the first known 2+2-type doubly eclipsing quadruple stellar system that also exhibits mutual eclipses between the two constituent eclipsing binaries (EBs).
• Revisiting gravitational instability in protostellar discs with improved radiative cooling models — The paper "Revisiting gravitational instability in protostellar discs with improved radiative cooling models" by Alison K.
• Cosmic Structures in CDM and SIDM — This review paper examines the standard Λ Cold Dark Matter (ΛCDM) model's success in explaining large-scale cosmic structures, the small-scale challenges it faces, and the self-interacting dark matter (SIDM) scenario as a promising alternative.
• Forecast for the detectability of patchy hydrogen reionization in WEAVE-QSO measurements of the Lyman- alpha forest power spectrum at redshift z at least 4 — The paper presents the first detailed forecasts for the detectability of patchy hydrogen reionization in the one-dimensional Lyman-α forest power spectrum to be measured by the WEAVE-QSO survey.
• The atmospheric vertical structure of Uranus and Neptune from thermochemical models: the impact of model assumptions — The atmospheric vertical structure of Uranus and Neptune from thermochemical models: the impact of model assumptions This paper investigates the atmospheric vertical structure of Uranus and Neptune using thermochemical equilibrium models, focusing on how different model assumptio
• Cosmography with DESI-DR1 Cosmic Chronometers: Direct H(z) measurements from Luminous Red Galaxy ages — This paper presents a new, model-independent estimate of the expansion history of the Universe using the cosmic chronometer (CC) approach applied to early-type galaxies (ETGs).
• Widefield Arecibo Virgo Extragalactic Survey: II. Characterizing the HI properties and environment of the WAVES South region — The paper presents the results from the WAVES South region of the Virgo cluster, a 20 deg2 survey conducted with the Arecibo telescope.
• Complex Energy-Dependent Behaviour of Quasi-Periodic Oscillation Observed in GRS 1915+105 — The paper presents a detailed energy-resolved analysis of quasi-periodic oscillations (QPOs) in the black hole X-ray binary GRS 1915+105, using data from the LAXPC instrument onboard AstroSat from a single orbit (02360) of observation T01 030T01 9000000358, carried out in March 2
• Chondrule formation in the outer disk from the primary three-dimensional chemical composition of CM chondrules — The paper investigates the major, minor, and trace element compositions of 66 chondrules and their associated fine-grained rims (FGRs) from three relatively unaltered CM carbonaceous chondrites—Asuka 12236, Paris, and Maribo—using a multi-analytical approach that combines fem
• The low luminosity end of Galactic HMXBs with eROSITA: Establishing a luminosity floor for accreting BeXRBs — We present a first look at the Galactic population of heretofore known HMXBs as observed by SRG/eROSITA during its first four surveys.
• Differential Reddening and Extinction Law Analyses of Galactic Open Clusters — This paper presents a homogeneous, member-based characterization of extinction properties in Galactic open clusters (OCs), including mean reddening, differential reddening, and color excess ratios (CERs).
• AT 2024qfm: a luminous fast blue optical transient at a redshift of z = 0.2267 identified by Lasair-ZTF — AT 2024qfm is a luminous fast blue optical transient (LFBOT) discovered at a redshift of z = 0.2267 ± 0.0002, identified in the Zwicky Transient Facility (ZTF) alert stream using a custom filter (FastFinder) in the Lasair broker that flags flux gradients over time.
• Optical concept model of the future cosmology project BISOU — We present an optical analysis of BISOU (Balloon Interferometer for Spectral Observations of the primordial Universe), an astronomical balloon-borne pathfinder spectrometer developed as part of a preparatory study for a future space mission aiming at measuring spectral distortion
• The sensitivity of TESS to transiting planets in TOIs with close-in stellar companions — The study quantifies how the presence of close-in stellar companions impacts the ability of TESS to detect transiting exoplanets.
• The Most Probable Outer Density Profile from Excursion Set Theory — The paper "The Most Probable Outer Density Profile from Excursion Set Theory" by Ericka Florio and Vasiliki Pavlidou investigates the validity of an analytic profile for the outer density distribution around galaxy clusters, derived from excursion set theory.
• Elemental Composition Evolution during the 2024 September 30 Solar Eruption: A Comparison of Hot and Cool Plasma Components with Solar Orbiter/SPICE, Hinode/EIS, and Chandrayaan-2/XSM — The paper presents novel observations from Solar Orbiter SPICE and EUI, Hinode/EIS, and Chandrayaan-2 XSM instruments, finding rapid abundance changes in the emitting plasma, on timescales of minutes, during the eruptive M7.6-class solar flare observed on 2024 Sept 30.
• Titanium Oxide Absorption as a Proxy to Detect Long term Variation and Activity Cycle in Proxima Centauri — The paper introduces a method to detect long-term stellar activity cycles in M-type stars using a molecular index based on Titanium Oxide (TiO) absorption at 567 nm, and applies it to Proxima Centauri.