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19922026
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764 papers · 1 filter

astro-ph.SR2026

Deep MUSE observations of SNR 0509-67.5 reveal a double degenerate merger progenitor

Priyam Das, Ivo R. Seitenzahl, Gilles Ferrand +5

Deep MUSE observations of SNR 0509-67.5 reveal that the coronal [Fe\,\textsc{xiv}] 5303 emission line appears with either one or two velocity components across the entire…

astro-ph.SR2026

Chemical fingerprints of binary mass transfer in massive stars

Harim Jin, Norbert Langer

The majority of massive stars are born in close binary systems. As stars expand when they age, mass transfer or even a merger with their companion is inevitable. However, most bina…

astro-ph.SR2026

Euclid: The convective-transition gap of 47 Tuc

M. Libralato, M. Griggio, R. Gerasimov +140

We report the first detection of the `convective-transition gap' (also known as `M-dwarf gap') in the globular cluster 47 Tuc (NGC 104) thanks to Euclid data. This feature, linked…

astro-ph.SR2026

Study of Massive OBA Stars with X-ray Emission

E. A. Nikolaeva, I. F. Bikmaev, E. N. Irtuganov +3

A study of the physical parameters of a sample of 15 OBA-type stars with detected X-ray emission from the Spektr-RG/eROSITA telescope is presented. While X-ray emission from cool s…

astro-ph.SR2026

High-precision K2/TESS Photometry and HERMES Spectroscopy of Four Bright Field Stars

Otto Trust, Santosh Joshi, Benard Nsamba +13

Space-based photometry from K2 and TESS, coupled with high-resolution spectroscopy, provides a unique opportunity to re-examine the variability and chemical nature of four bright s…

astro-ph.SR2026

Towards inertial-mode helioseismology: Direct sensing of solar rotation at 75 deg latitude and 0.8 Rsun

Prithwitosh Dey, Laurent Gizon, Yuto Bekki

Solar internal rotation at high latitudes is poorly constrained by acoustic-mode helioseismology. Global inertial modes observed on the Sun are highly sensitive to solar differenti…

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

Testing the 3-equation Kuhfuss Convection Model using the Sun

T. A. M. Braun, F. Ahlborn, F. Kupka +1

Simplified, one-dimensional models are necessary to model convection in the context of stellar evolution. By including the non-local effects of convection, turbulent convection mod…

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

Discovery of a runaway star likely ejected by a Type Iax Supernova

A. Bhat, M. Hollands, M. Dorsch +5

Over the past decade, runaway stars have been identified, believed to originate either as surviving donors of Type Ia supernovae or as partially deflagrated accretors producing Typ…

astro-ph.SR2026

Nested, asymmetric H-He circumstellar shells in the Type Icn/Ibn SN 2024abvb

The INTEL Collaboration, J. P. Anderson, C. Aster +17

Interacting transients probe mass loss in the final stages of stellar evolution; however, the geometry and timing of multi-episode mass loss remain poorly constrained. SN 2024abvb…

astro-ph.SR2026★ 5 cited

Binarity at LOw Metallicity (BLOeM): Projected rotational velocities

D. J. Lennon, S. R. Berlanas, A. Herrero +36

The Binarity at LOw Metallicity (BLOeM) survey is an ESO large programme designed to obtain multi-epoch spectroscopy for 929 massive stars in the Small Magellanic Cloud (SMC). It w…

astro-ph.SR2026★ 3 cited

Drawing the line between explosion and collapse in electron-capture supernovae -- I. Impact of conductive flame speeds and ignition conditions on the explosion mechanism

Alexander Holas, Samuel W. Jones, Friedrich K. Roepke +5

Electron-capture supernovae (ECSNe) are commonly thought to result in a collapse to a neutron star. Recent work has shown that a thermonuclear explosion is also a possible outcome.…

astro-ph.SR2026★ 4 cited

Thermal-timescale accretion does not always yield critical rotation in mass gainers

Chen Wang, Mike Y. M. Lau, Xiang-Dong Li +7

Binary evolution plays a central role in producing rapidly rotating stars. Previous studies have shown that mass gainers in binaries can reach critical rotation after accreting onl…

astro-ph.SR2026

Formation of massive multiple-star systems: early migration and mergers

Sunmyon Chon, Alejandro Vigna-Gómez

Massive stars are often found in multiple systems, yet how binary-star systems with very close separations ( au) assemble remains unresolved. We investigate the formation…

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.SR2026

EWOCS-V: Is Wd1-72 a recent post-interaction WR+O binary?

C. J. K. Larkin, J. Mackey, H. Jin +14

The evolutionary origin of Wolf-Rayet (WR) stars at Solar metallicity is unclear. Single-star evolution from massive O stars, possibly via a Luminous Blue Variable phase, is challe…

astro-ph.SR2025★ 5 cited

The stellar activity-rotation-age relationship under the lens of asteroseismology

C. Pezzotti, J. Bétrisey, G. Buldgen +6

In low-mass stars, the connection between magnetic activity, rotation period, and age provides key insights into the functioning of dynamos. Fully understanding the activity-rotati…

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★ 1 cited

Magnetic field generation in mergers of massive main-sequence stars

Sebastian T. Ohlmann, Fabian R. N. Schneider, Friedrich K. Roepke +3

Magnetic fields are found in many astrophysical objects, ranging from galaxy clusters to the interstellar medium of galaxies and neutron stars. Strong surface magnetic fields are a…

astro-ph.SR2025★ 2 cited

SN 2022ngb: A faint, slowly evolving Type IIb supernova with a low-mass envelope

J. -W. Zhao, S. Benetti, Y. -Z. Cai +35

An extensive photometric and spectroscopic follow-up campaign of the Type IIb SN 2022ngb is presented in the article. Through detailed modeling of this dataset, we aim to constrain…

astro-ph.SR2025★ 5 cited

Interacting binaries on the Main Sequence as in-situ tracers of mass transfer efficiency and stability

Koushik Sen, Mathieu Renzo, Harim Jin +8

Understanding the transfer of mass and angular momentum in binary interactions is crucial for modelling the evolution of any interacting binary after the first mass transfer phase.…

astro-ph.SR2025★ 2 cited

Solar carbon abundance from 3D non-LTE modelling of the diagnostic lines of the CH molecule

Richard Hoppe, Maria Bergemann, Philipp Eitner +5

The spectral lines of the CH molecule are a key carbon (C) abundance diagnostic in FGKM-type stars. These lines are detectable in metal-rich and, in contrast to atomic C lines, als…

astro-ph.SR2025★ 7 cited

A comprehensive grid of massive binary evolution models for the Galaxy - Surface properties of post-mass transfer stars

Harim Jin, Norbert Langer, Andrea Ercolino +1

Massive stars often evolve in binary systems, in which binary interactions significantly affect their evolution. Massive stars in the Galaxy serve as valuable testbeds for this due…