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19942026
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astro-ph.SR2026

Cause of chromospheric opposite polarity intrusions discovered in Sunrise III/SCIP data: MURaM-ChE simulations point to twisted flux ropes

Patrick A. Ondratschek, Damien F. Przybylski, Robert H. Cameron +33

The Sunrise Chromospheric Infrared spectroPolarimeter (SCIP) instrument onboard the balloon-borne Sunrise III observatory provided new high-resolution observations of the solar chr…

astro-ph.SR2026

Six new doubly eclipsing quadruples in a 2+2 architecture

P. Zasche, H. Kucakova, J. Kara +5

The study presents a confirmation of six quadruples with two sets of eclipses that have the 2+2 architecture. These so-called doubly eclipsing systems still present a quite rare gr…

astro-ph.SR2026

The symphony of pulsations and binarity among massive stars using HERMES spectroscopy and TESS photometry

K. Thomson-Paressant, D. M. Bowman, F. Nardini +16

A wide range of variability mechanisms exist among intermediate mass and massive stars, which are not yet fully understood. Using complementary data sources for a large population…

astro-ph.SR2026★ 1 cited

Three-dimensional Magnetic Field Structure of a Quiet-Sun Region Revealed by Sunrise III/SCIP

Masahito Kubo, Yukio Katsukawa, Yusuke Kawabata +38

The balloon-borne stratospheric solar observatory Sunrise III successfully completed 6.5 days of observations in July 2024. One of its focal-plane instruments, the Sunrise Chromosp…

astro-ph.SR2026

Three-dimensional Magnetic Structures of Ellerman Bombs revealed by SUNRISE III/SCIP

Yusuke Kawabata, Yukio Katsukawa, Masahito Kubo +37

Ellerman bombs (EBs) are widely recognized as photospheric and chromospheric signatures of magnetic reconnection. However, the three-dimensional (3D) magnetic topology has remained…

astro-ph.SR2026

The s-process at Subsolar Metallicity: Insights from High-Resolution Infrared Spectroscopy of Magellanic Cloud Planetary Nebulae

N. C. Sterling, M. G. Stephenson, Harriet L. Dinerstein +8

We present observations of 12 Magellanic Cloud planetary nebulae (PNe) obtained with the high-resolution near-infrared spectrometer IGRINS on Gemini South. In 10 targets we detect…

astro-ph.SR2026

Understanding the Travel-time Asymmetry of Acoustic Waves in Sunspots With Time-distance Helioseismology

Haiyu Li, Tobías Felipe, Elena Khomenko +3

Mapping the subsurface structure and flow field of sunspots has been a challenging task for helioseismology. In this work, we investigate the propagation of acoustic waves in a sun…

astro-ph.SR2026

A Test of FeH Line Parameters using DR19 APOGEE spectra of Benchmark M Dwarfs

Anderson Silva-Andrade, Diogo Souto, Katia Cunha +9

Recent studies have suggested a mismatch of up to 0.20 dex between iron abundances derived from Fe I and FeH lines in the H-band spectra of M dwarfs, and in this work we investigat…

astro-ph.SR2026

Height Dependent Phase Shifts of Wave Pulses in the Lower Solar Atmosphere Measured with SUNRISE III

Andreas Lagg, H. N. Smitha, Sami K. Solanki +32

We report on the measurement of the height-dependent time shifts of wave pulses in the lower solar atmosphere from high-resolution spectro-polarimetric observations obtained with t…

astro-ph.SR2026★ 2 cited

Symbiotic binaries in the Gaia data. I. Known symbiotics in DR3 and FPR

Jaroslav Merc

Symbiotic stars are long-period interacting binaries composed of an evolved giant and a hot compact companion. Their complex spectra and variability make them both astrophysically…

astro-ph.SR2026

Physics of Eclipsing Binaries. VI. Hot, compact stars

David Jones, Nicole Reindl, Kyle Conroy +9

Models of eclipsing binaries require the assignment of appropriate emergent intensities to the surface elements of the binary components. For distance-dependent modelling of flux-c…

astro-ph.SR2026

Asteroseismic Analysis of the Merger Product Red Giant in the Persei System

Rozália Z. Ádám, László Molnár, Róbert Szabó +7

Context. Persei is a long-period eclipsing binary system ( years) containing a red giant primary, and it is well known for its multi-faceted classification as a…

astro-ph.SR2026

The role of mass transfer efficiency in stability criteria: Implementation in SEVN and a test on blue stragglers and binary compact objects

M. Echeveste, G. J. Escobar, G. Iorio +12

Context: The stability of mass transfer through Roche-lobe overflow plays a key role in shaping the outcome of binary interactions. However, the criterion for mass transfer stabili…

astro-ph.SR2026

Multi-height Identification of Sausage and Fluting Eigenmodes in a Solar Pore

Shahin Jafarzadeh, David B. Jess, Marco Stangalini +34

Magnetic pores are compact, strongly magnetised waveguides in the lower solar atmosphere and therefore provide favourable conditions for identifying magnetohydrodynamic (MHD) wave…

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★ 3 cited

Magnetically Structured Oscillatory Power Along an Active-Region Transect in Near-UV Sunrise-III/SUSI Spectroscopy

Shahin Jafarzadeh, David B. Jess, Marco Stangalini +33

We present a multi-line characterisation of how oscillatory power is organised across distinct magnetic environments in an active region using seeing-free, stratospheric near-ultra…

astro-ph.SR2026★ 2 cited

Multi-line Wave Signatures in a Sunspot from Near-UV Sunrise III/SUSI Observations

Shahin Jafarzadeh, David B. Jess, Marco Stangalini +32

Magnetohydrodynamic waves redistribute energy in magnetic structures of the lower solar atmosphere, yet constraints on how wave power and dominant frequencies are organised above s…

astro-ph.SR2026

Luminaries in the Sky: The TESS LEGACY sample of bright stars. II. In-depth seismic characterisation of 32 naked-eye stars in the PLATO LOP fields

E. Panetier, G. T. Hookway, E. Corsaro +13

The NASA TESS mission is conducting a nearly full-sky survey, enabling the photometric characterisation of millions of stars. The forthcoming ESA PLATO mission will provide long-du…

astro-ph.SR2026★ 2 cited

Solar flare ribbons structured by uncombed chromospheric loops

L. P. Chitta, E. R. Priest, David Orozco Suárez +33

A part of the magnetic energy released during a flare is transported to the lower atmosphere. High-resolution observations show that flare ribbons, sites of energy deposition at th…

astro-ph.SR2026

Orbital motion and dynamical mass of the complex periodic variable binary system 2MASS J05082729-2101444

S. Curiel, G. N. Ortiz-León, V. J. S. Béjar +22

We used very long baseline interferometry to constrain the orbit of the binary system 2MASS J05082729-2101444. We observed the system with the VLBA in three epochs at a frequency o…

astro-ph.SR2026

Kepler Discovery of GW Vir Pulsations of the Central Star of Planetary Nebula Kn 61

Paulina Sowicka, Gerald Handler, J. J. Hermes +1

We report the discovery of pulsations in the N-rich PG 1159-type central star of the planetary nebula Kn 61 based on one month of Kepler Short Cadence observations. We detect four…

astro-ph.SR2026

Ariel stellar characterisation IV. Fundamental parameters of 18 hot stars in the Ariel mission candidate sample

H. Ramler, S. P. D. Borthakur, C. P. Folsom +16

The characterisation of exoplanetary systems depends on the accurate determination of host star parameters. The Ariel mission will probe the atmospheres of a statistically signific…

astro-ph.SR2026

Accelerating 3D Non-LTE Synthesis with Graph Neural Networks

A. Vicente Arévalo, A. Asensio Ramos, C. J. Díaz Baso

Spectropolarimetric interpretation of chromospheric lines requires solving the radiative transfer problem under non-local thermodynamic equilibrium (non-LTE) conditions. This means…

astro-ph.SR2026

Discovery of the first outbursting hot subdwarf binary: ZTF J0007+4804

E. Stringer, T. Kupfer, K. Deshmukh +10

Hot subdwarf binaries with white dwarf companions with orbital periods of less than two hours are progenitor candidates for massive single white dwarfs as well as a variety of ther…