Showing 2024 · astro-ph.SRShow all

15 papers · 2 filters

astro-ph.SR2024★ 1 cited

Beryllium: The smoking gun of a rejuvenated star

Anne Rathsam, Jorge Meléndez, Amanda I. Karakas

Context. The chemistry and Galactic velocity components of the star HD 65907 suggest that despite its young isochronal age of 5 Gyr, it is in fact a merger of two old Populat…

astro-ph.SR2024★ 6 cited

The grazing angle icy protoplanetary disk PDS 453

Laurine Martinien, François Ménard, Gaspard Duchêne +12

PDS 453 is a rare highly inclined disk where the stellar photosphere is seen at grazing incidence on the disk surface. Our goal is take advantage of this geometry to constrain the…

astro-ph.SR2024★ 3 cited

Thorne-Żytkow Objects

Anna J. G. O'Grady, Takashi J. Moriya, Mathieu Renzo +1

Interacting binary star systems play a critical role in many areas of astrophysics. One interesting example of a binary merger product are Thorne-Żytkow Objects (TŻOs), stars that…

astro-ph.SR2024★ 7 cited

Stable Case BB/BC Mass Transfer to Form GW190425-like Massive Binary Neutron Star Mergers

Ying Qin, Jin-Ping Zhu, Georges Meynet +14

On April 25th, 2019, the LIGO-Virgo Collaboration discovered a Gravitational-wave (GW) signal from a binary neutron star (BNS) merger, i.e., GW190425. Due to the inferred large tot…

astro-ph.SR2024★ 9 cited

BH-BH mergers with & without EM counterpart: A model for stable tertiary mass transfer in hierarchical triple systems

F. Kummer, S. Toonen, A. Dorozsmai +2

Triple stars are prevalent within the population of observed stars. Their evolution, compared to binaries, is notably more complex, influenced by unique dynamical, tidal, and mass…

astro-ph.SR2024★ 5 cited

MHD waves in homogeneous and continuously stratified atmospheres

Paul S. Cally, Thomas J. Bogdan

The basic equations, concepts, and modes of linear, ideal, MHD waves -- slow, Alfvén and fast -- are set out and generalised to gravitationally-stratified atmospheres. Particular a…

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

Dust formation during the interaction of binary stars by common envelope

Luis C. Bermúdez-Bustamante, Orsola De Marco, Lionel Siess +7

We performed numerical simulations of the common envelope (CE) interaction between two intermediate-mass asymptotic giant branch (AGB) stars and their low-mass companions. For the…

astro-ph.SR2024★ 1 cited

The impact of incorrect dissociation energies on inferred photospheric abundances

Sarah E Aquilina, Andrew R Casey, Adam J Wheeler

Spectral synthesis codes are essential for inferring stellar parameters and detailed chemical abundances. These codes require many physical inputs to predict an emergent spectrum.…

astro-ph.SR2024★ 37 cited

Binarity at LOw Metallicity (BLOeM): a spectroscopic VLT monitoring survey of massive stars in the SMC

T. Shenar, J. Bodensteiner, H. Sana +74

Surveys in the Milky Way and Large Magellanic Cloud revealed that the majority of massive stars will interact with companions during their lives. However, knowledge of the binary p…

astro-ph.SR2024★ 10 cited

Barium stars as tracers of s-process nucleosynthesis in AGB stars III. Systematic deviations from the AGB models

B. Világos, B. Cseh, A. Yagüe López +4

Barium (Ba) stars help to verify asymptotic giant branch (AGB) star nucleosynthesis models since they experienced pollution from an AGB binary companion and thus their spectra carr…

astro-ph.SR2024★ 7 cited

The -process nucleosynthesis in core-collapse supernovae II. Effect of the explosive recipe

Lorenzo Roberti, Marco Pignatari, Chris L. Fryer +1

The -process in core-collapse supernovae (CCSNe) can produce a number of neutron-deficient stable isotopes heavier than iron (p-nuclei). However, current model predictions do to…

astro-ph.SR2024★ 34 cited

At least one in a dozen stars exhibits evidence of planetary ingestion

Fan Liu, Yuan-Sen Ting, David Yong +6

Stellar chemical compositions can be altered by ingestion of planetary material and/or planet formation which removes refractory material from the proto-stellar disc. These "planet…

astro-ph.SR2024★ 10 cited

Cool and Data-Driven: An Exploration of Optical Cool Dwarf Chemistry with Both Data-Driven and Physical Models

Adam D. Rains, Thomas Nordlander, Stephanie Monty +6

Detailed chemical studies of F/G/K -- or Solar-type -- stars have long been routine in stellar astrophysics, enabling studies in both Galactic chemodynamics, and exoplanet demograp…

astro-ph.SR2024★ 13 cited

Dust formation in common envelope binary interactions -- II: 3D simulations with self-consistent dust formation

Luis C. Bermúdez-Bustamante, Orsola De Marco, Lionel Siess +7

We performed numerical simulations of the common envelope (CE) interaction between thermally-pulsing asymptotic giant branch (AGB) stars of 1.7~\Msun and 3.7~\Msun, respectively, a…