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astro-ph.SR2026

An Eccentric Massive Protobinary Assembled via a Core-merger Parabolic Encounter

Yao Wang, Yichen Zhang, Rubén Fedriani +14

Most massive stars form in binary systems, which profoundly influence their subsequent evolution. However, how such systems form remains poorly understood, with several competing s…

astro-ph.SR2026

Multiplicity of Cool Stars and their Evolution

Matthew I. Swayne, Leen Decin, Theo Khouri +12

Making up a sizeable portion of the galactic census, stellar multiples are experiencing a renaissance. Enabling the study of multiple strands of the study of cool stars, stellar mu…

astro-ph.SR2026

OH/IR stars in the inner Galactic bulge: I. Colour, CO line, and stellar light curve characteristics

H. Olofsson, T. Khouri, S. Muller +11

Stars on the asymptotic giant branch (AGB) play important roles in a number of astronomical contexts. To quantify these roles, it is necessary to establish the mass-loss characteri…

astro-ph.SR2026★ 1 cited

Unlocking accretion rate diagnostics for high-mass protostars using JWST/MIRI HI lines

S. D. Reyes-Reyes, H. Beuther, E. F. van Dishoeck +14

While many aspects of high-mass star formation have been investigated, the accretion onto the central protostars is one of the most fundamental but less explored physical propertie…

astro-ph.SR2026

The Inner and Outer Shock Layers of Bow Shocks in Cataclysmic Variables

Krystian Ilkiewicz, Christian Knigge, Simone Scaringi +3

Bow shocks around cataclysmic variables (CVs) have traditionally been identified with a single bright optical arc. This feature has been interpreted as the bow shock formed by the…

astro-ph.SR2026★ 1 cited

JOYS: JWST MIRI/MRS spectra of the inner 500 au region of the L1527 IRS bipolar outflow

R. Devaraj, E. F. van Dishoeck, T. P. Ray +12

This study characterized the physical and kinematic properties within the innermost 500 au region of the L1527 bipolar outflow, a class 0/I low-mass protostar using JWST MIRI/MRS s…

astro-ph.SR2025★ 1 cited

X TrA through the eyes of MATISSE: More evidence of clumpy molecular layers around C-type asymptotic giant branch stars

V. Răstău, C. Paladini, J. Drevon +22

Aims. The goal of this study is to further the understanding of the wind formation mechanism in asymptotic giant branch (AGB) stars through the analysis of the close environment (w…

astro-ph.SR2025★ 3 cited

JWST observations of the Ring Nebula (NGC 6720) -- II. PAH emission

Nicholas Clark, Els Peeters, Nick L. J. Cox +16

Polycyclic aromatic hydrocarbons (PAHs) and carbonaceous dust have been observed in clumpy circumstellar environments, yet their formation and evolutionary pathways in such environ…

astro-ph.SR2025★ 1 cited

The SOFIA Massive (SOMA) Star Formation Q-band Follow-up. II. Hydrogen Recombination Lines Toward High-Mass Protostars

Prasanta Gorai, Kotomi Taniguchi, Jonathan C. Tan +11

Hydrogen recombination lines (HRLs) are valuable diagnostics of the physical conditions in ionized regions around high-mass stars. Understanding their broadening mechanisms and int…

astro-ph.SR2025★ 1 cited

Deep survey of millimeter RRLs towards the planetary nebulae IC 418 and NGC 7027

Teresa Huertas-Roldán, Javier Alcolea, D. Aníbal García-Hernández +7

The circumstellar environments of PNe are wonderful chemically rich astrophysical laboratories in which the ionization of atoms and the formation of simple and complex molecules ca…

astro-ph.SR2025★ 1 cited

Charting circumstellar chemistry of carbon-rich asymptotic giant branch stars. II. Abundances and spatial distributions of CS

R. Unnikrishnan, M. Andriantsaralaza, E. De Beck +9

The circumstellar envelopes (CSEs) of asymptotic giant branch (AGB) stars harbour a rich variety of molecules and are sites of complex chemistry. Our current understanding of the c…

astro-ph.SR2025★ 9 cited

Investigating the Upper Scorpius OB association with HERMES. I. The spectroscopic sample and 6D kinematics

Joseph J. Armstrong, Jonathan C. Tan, Nicholas J. Wright +5

We present results from a large spectroscopic survey of the nearest young association to the Sun, Upper Scorpius, conducted using 2dF/HERMES on the Anglo-Australian Telescope. We u…

astro-ph.SR2025★ 2 cited

Mid-infrared extinction curve for protostellar envelopes from JWST-detected embedded jet emission: the case of TMC1A

K. D. Assani, Z. -Y. Li, J. P. Ramsey +15

Context: Dust grains are key components of the interstellar medium and play a central role in star formation, acting as catalysts for chemical reactions and as building blocks of p…

astro-ph.SR2025★ 7 cited

ATOMIUM: Continuum emission and evidence of dust enhancement from binary motion

T. Danilovich, N. Samaratunge, Y. Mori +35

Low- and intermediate-mass stars on the asymptotic giant branch (AGB) account for a significant portion of the dust and chemical enrichment in their host galaxy. Here we present AL…

astro-ph.SR2025

New submillimetre HCN lasers in carbon-rich evolved stars

W. Yang, K. T. Wong, H. Wiesemeyer +6

Strong laser emission from hydrogen cyanide (HCN) at 805 and 891 GHz has been discovered towards carbon-rich (C-rich) AGB stars, originating from the Coriolis-coupled system betwee…

astro-ph.SR2025★ 2 cited

ALMA observations of CO isotopologues towards six obscured post-AGB stars

T. Khouri, D. Tafoya, W. H. T. Vlemmings +13

Low- and intermediate-mass stars evolve through the asymptotic giant branch (AGB), when an efficient mass-loss process removes a significant fraction of their initial mass. A subst…

astro-ph.SR2024★ 33 cited

JWST Observations of Young protoStars (JOYS). HH 211: the textbook case of a protostellar jet and outflow

A. Caratti o Garatti, T. P. Ray, P. J. Kavanagh +22

We use the James Webb Space Telescope (JWST) and its Mid-Infrared Instrument (MIRI) (5-28 um), to study the embedded HH 211 flow. We map a 0.95'x0.22' region, covering the full ext…

astro-ph.SR2024★ 10 cited

One month convection timescale on the surface of a giant evolved star

W. Vlemmings, T. Khouri, B. Bojnordi Arbab +2

The transport of energy through convection is important during many stages of stellar evolution, and is best studied in our Sun or giant evolved stars. Features that are attributed…

astro-ph.SR2024★ 1 cited

Post-Outburst Chemistry in a Very Low-Luminosity Object: Peculiar High Abundance of Nitric Oxide

B. M. Kulterer, S. F. Wampfler, N. F. W. Ligterink +7

Abridged: Very Low Luminosity Objects (VeLLOs) are deeply embedded, and extremely faint objects and are thought to be in the quiescent phase of the episodic accretion process. They…

astro-ph.SR2024★ 5 cited

Five new eclipsing binaries with low-mass companions

J. Lipták, M. Skarka, E. Guenther +18

Precise space-based photometry from the Transiting Exoplanet Survey Satellite results in a huge number of exoplanetary candidates. However, the masses of these objects are unknown…

astro-ph.SR2024★ 6 cited

Non-thermal radio emission in Sakurai's Object

Marcin Hajduk, Peter A. M. van Hoof, Albert A. Zijlstra +5

The very late thermal pulse (VLTP) affects the evolution of 20\% of 1--8\, stars, repeating the last phases of the red giant within a few years and leading t…

astro-ph.SR2024★ 15 cited

Chemical tracers of a highly eccentric AGB-main sequence star binary

T. Danilovich, J. Malfait, M. Van de Sande +32

Binary interactions have been proposed to explain a variety of circumstellar structures seen around evolved stars, including asymptotic giant branch (AGB) stars and planetary nebul…

astro-ph.SR2024★ 6 cited

An impressionist view of V Hydrae. When MATISSE paints Asymmetric Giant Blobs

L. Planquart, C. Paladini, A. Jorissen +29

Our purpose is to study the effect of binary companions located within the first 10 stellar radii from the primary AGB star. In this work, we target the mass-losing carbon star V H…

astro-ph.SR2024★ 3 cited

Probing the dynamical and kinematical structures of detached shells around AGB stars

M. Maercker, E. De Beck, T. Khouri +6

Aims. We aim to resolve the spatial and kinematic sub-structures in five detached-shell sources to provide detailed constraints for hydrodynamic models that describe the formation…