Showing astro-ph.SRShow all

526 papers · 1 filter

astro-ph.SR2026

Chromospherically Active Stars in the MeerKAT Galactic Plane Survey

Okwudili D. Egbo, David A. H. Buckley, Paul J. Groot +4

Stellar magnetic activity has long been established to occur in subsets of late-type main-sequence stars and manifests itself in the form of chromospheric and coronal activity. Thi…

astro-ph.SR2026

MINDS survey of silicates in T Tauri disks: Correlation between dust and gas

J. Varga, Th. Henning, L. B. F. M. Waters +20

Context. Silicates are key constituents of planet-forming disks and major building blocks of rocky planets. Mid-infrared spectral features of micron-sized silicate grains trace gra…

astro-ph.SR2026

One's loss is (not) another's gain: Isotropic re-emission destabilizes mass transfer from radiative donor stars

K. D. Temmink, S. Justham, O. R. Pols

Non-conservative mass transfer plays a central role in close-binary evolution, yet its effects on mass-transfer stability are uncertain. One widely adopted prescription, isotropic…

astro-ph.SR2026

Isochrone-cloud fitting and asteroseismology of the Kepler open cluster NGC6866

Haotian Wang, Gang Li, Dario J. Fritzewski +2

We investigate how isochrones computed with different input physics and initial conditions affect the age dating of the open cluster NGC 6866, and compare the results with asterose…

astro-ph.SR2026

BlackGEM observations of compact pulsating stars: Mode identification for the DOV PG 1159-035 using multi-colour photometry

P. Ranaivomanana, C. Johnston, M. Uzundag +10

While space-based telescopes offer unparalleled precision for asteroseismology, ground-based observations remain crucial for identifying compact pulsator candidates and enabling th…

astro-ph.SR2026★ 1 cited

A persistent bow shock in a diskless magnetised accreting white dwarf

Krystian Ilkiewicz, Simone Scaringi, Domitilla de Martino +9

Stellar bow shocks are formed when an outflow interacts with the interstellar medium. In white dwarfs accreting from a binary companion, outflows are associated with either strong…

astro-ph.SR2026

The optical photometric and spectroscopic periodicities of the cataclysmic variable SRGt 062340.2-265751

J. Brink, D. A. H. Buckley, M. Veresvarska +10

We report on optical spectroscopic and photometric follow-up observations of the eROSITA discovered transient SRGt 062340.2-265751 and show that it displays the characteristics of…

astro-ph.SR2026★ 7 cited

A 500 pc volume-limited sample of hot subluminous stars II. Atmospheric parameters, mass distribution, and kinematics

H. Dawson, M. Dorsch, S. Geier +30

We present a quantitative spectroscopic and kinematic analysis of a volume-complete sample of hot subluminous stars within 500 pc of the Sun, assembled using accurate parallax meas…

astro-ph.SR2025★ 3 cited

Probing stellar rotation in the Pleiades with gravity-mode pulsators

D. J. Fritzewski, A. Kemp, G. Li +1

Due to their proximity, the Pleiades are an important benchmark open cluster. Despite its status, asteroseismic analyses of its members are rare. In particular, the gravity-mode (g…

astro-ph.SR2025★ 1 cited

The evolutionary history of ultra-compact accreting binaries. I. Chemical abundances and formation channel of the eclipsing AM CVn system ZTF J225237.05-051917.4 from HST spectroscopy

W. Yu, A. F. Pala, T. Kupfer +33

AM Canum Venaticorum (AM CVn) stars are ultra-compact binary systems composed of a white dwarf (WD) primary accreting from a H-deficient donor. They are important as potential prog…

astro-ph.SR2025★ 2 cited

Asteroseismic detection of an internal magnetic field in the B0.5V pulsator HD 192575

Jelle Vandersnickt, Vincent Vanlaer, Mathijs Vanrespaille +1

Internal magnetic fields are an elusive component of stellar structure. However, they can play an important role in stellar structure and evolution models through efficient angular…

astro-ph.SR2025★ 1 cited

Automated all-sky detection of γ Doradus / δ Scuti hybrids in TESS data from positive unlabelled (PU) learning

Mykyta Kliapets, Pablo Huijse, Andrew Tkachenko +4

The Transiting Exoplanet Survey Satellite (TESS) mission has observed hundreds of millions of stars, substantially contributing to the available pool of high-precision photometric…

astro-ph.SR2025★ 3 cited

Unsupervised learning for variability detection with Gaia DR3 photometry. The main sequence-white dwarf valley

P. Ranaivomanana, C. Johnston, G. Iorio +4

The unprecedented volume and quality of data from space- and ground-based telescopes present an opportunity for machine learning to identify new classes of variable stars and pecul…

astro-ph.SR2025

Magnetic fields in planetary nebulae detected through non-thermal radio continuum emission

Marcin Hajduk, Timothy Shimwell, Glenn White +3

Context. Planetary nebulae are shells ejected by low- and intermediate-mass stars. The slow wind ejected by the asymptotic giant branch star is compressed by a fast stellar wind to…

astro-ph.SR2025★ 12 cited

Molecular Mobility of Extraterrestrial Ices: Surface Diffusion in Astrochemistry and Planetary Science

N. F. W. Ligterink, C. Walsh, H. M. Cuppen +12

Molecules are ubiquitous in space. They are necessary component in the creation of habitable planetary systems and can provide the basic building blocks of life. Solid-state proces…

astro-ph.SR2025★ 14 cited

Blue Stragglers and Friends: Initial Evolutionary Pathways in Close Low-Mass Binaries: Literature Review

Robert D. Mathieu, Onno R. Pols

The scope of this literature review is observations of the products of first-stage evolution for binaries having components with M < 2 . A taxonomy for these products comp…

astro-ph.SR2025★ 2 cited

Good things come to those who wait: Watching donor stars evolve towards a mass-transfer instability

Karel D. Temmink, Onno R. Pols, Stephen Justham +1

Unstable mass transfer in binary systems can lead to transients such as luminous red novae (LRNe). Observations of such transients are valuable for understanding and testing models…

astro-ph.SR2025★ 5 cited

Asteroseismology of the young open cluster NGC 2516 II. Constraining cluster age using gravity-mode pulsators

Gang Li, Joey S. G. Mombarg, Zhao Guo +1

Although asteroseismology is regarded as the most powerful tool for probing stellar interiors, seismic modelling remains dependent on global stellar parameters. Stellar clusters of…

astro-ph.SR2025★ 6 cited

CoSEE-Cat: A Comprehensive Solar Energetic Electron event Catalogue obtained from combined in situ and remote-sensing observations from Solar Orbiter -- Catalogue description and first statistical results

A. Warmuth, F. Schuller, R. Gómez-Herrero +39

(abridged) The acceleration of particles at the Sun and their propagation through interplanetary space are key topics in heliophysics. Specifically, solar energetic electrons (SEEs…

astro-ph.SR2025

Understanding post-red giant branch binaries through stable mass transfer

C. A. S. Moltzer, O. R. Pols, H. Van Winckel +2

Post-RGB and post-AGB binaries consist of a primary star that has recently evolved off either the RGB or AGB after losing most of its envelope, and a main-sequence companion. They…

astro-ph.SR2025★ 5 cited

MINDS. Cha Hα 1, a brown dwarf with a hydrocarbon-rich disk

María Morales-Calderón, Hyerin Jang, Aditya M. Arabhavi +23

Context. Recent JWST observations have shown that brown dwarfs (BD) are chemically rich, offering valuable insights into giant planet formation. Aims. As part of the MIRI mid-INfra…

astro-ph.SR2025

Observational mapping of the mass discrepancy in eclipsing binaries. A new self-contained framework for concurrent analysis of photometric and spectroscopic time series

Nadya Serebriakova, Andrew Tkachenko, Cole Johnston +2

The mass discrepancy problem, observed in high-mass stars within eclipsing binaries, highlights systematic differences between dynamical and evolutionary mass estimates, challengin…

astro-ph.SR2025★ 5 cited

Interior rotation modelling of the Cep pulsator HD 192575 including multiplet asymmetries

V. Vanlaer, D. M. Bowman, S. Burssens +4

Rotation plays an important role in stellar evolution. However, the mechanisms behind the transport of angular momentum in stars at various stages of their evolution are not well u…

astro-ph.SR2025★ 3 cited

The stellar population in the SARAO MeerKAT Galactic Plane Survey

Okwudili D. Egbo, David A. H. Buckley, Paul J. Groot +5

We report on optically selected stellar candidates of SARAO MeerKAT 1.3 GHz radio continuum survey sources of the Galactic plane. Stellar counterparts to radio sources are selected…