A. Tkachenko
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View article: The large-scale kinematics of young stars in the Milky Way disc: first results from SDSS-V
The large-scale kinematics of young stars in the Milky Way disc: first results from SDSS-V Open
We present a first large-scale kinematic map of $\sim$50,000 young OB stars ($T_{\rm eff} \geq 10,000$ K), based on BOSS spectroscopy from the Milky Way Mapper OB program in the ongoing Sloan Digital Sky Survey V (SDSS-V). Using photogeome…
View article: Orbital and Physical Properties of the Pleiades Binary 27 Tau (Atlas)
Orbital and Physical Properties of the Pleiades Binary 27 Tau (Atlas) Open
We report new spectroscopic and interferometric observations of the Pleiades binary star Atlas, which played an important role nearly 3 decades ago in settling the debate over the distance to the cluster from ground-based and space-based d…
View article: Mixing due to internal gravity waves can explain the CNO surface abundances of B-type detached eclipsing binaries and single stars
Mixing due to internal gravity waves can explain the CNO surface abundances of B-type detached eclipsing binaries and single stars Open
Context. Observations of double-lined spectroscopic eclipsing binaries are ideal for studies of stellar evolution. Such stars have tight model-independent constraints on their masses and radii. When used in combination with spectroscopical…
View article: Orbital and Physical Properties of the Pleiades Binary 27 Tau (Atlas)
Orbital and Physical Properties of the Pleiades Binary 27 Tau (Atlas) Open
We report new spectroscopic and interferometric observations of the Pleiades binary star Atlas, which played an important role nearly three decades ago in settling the debate over the distance to the cluster from ground-based and space-bas…
View article: SDSS-V Milky Way Mapper (MWM): ASPCAP Stellar Parameters and Abundances in SDSS-V Data Release 19
SDSS-V Milky Way Mapper (MWM): ASPCAP Stellar Parameters and Abundances in SDSS-V Data Release 19 Open
The goal of this paper is to describe the science verification of Milky Way Mapper (MWM) APOGEE Stellar Parameter and Chemical Abundances Pipeline (ASPCAP) data products published in Data Release 19 (DR19) of the fifth phase of the Sloan D…
View article: MOCKA – A PLATO mock asteroseismic catalogue: Simulations for gravity-mode oscillators
MOCKA – A PLATO mock asteroseismic catalogue: Simulations for gravity-mode oscillators Open
Context . With the PLAnetary Transits and Oscillation of stars (PLATO) space mission set for launch in December 2026 by the European Space Agency (ESA), a new photometric legacy and a future of new scientific discoveries await the communit…
View article: Dominating Set, Independent Set, Discrete $k$-Center, Dispersion, and Related Problems for Planar Points in Convex Position
Dominating Set, Independent Set, Discrete $k$-Center, Dispersion, and Related Problems for Planar Points in Convex Position Open
Given a set $P$ of $n$ points in the plane, its unit-disk graph $G(P)$ is a graph with $P$ as its vertex set such that two points of $P$ are connected by an edge if their (Euclidean) distance is at most $1$. We consider several classical p…
View article: MOCKA -- A PLATO mock asteroseismic catalogue: Simulations for gravity-mode oscillators
MOCKA -- A PLATO mock asteroseismic catalogue: Simulations for gravity-mode oscillators Open
With ESA's PLATO space mission set for launch in December 2026, a new photometric legacy and a future of new scientific discoveries await. In this work we investigate PLATO's potential for observing pulsating stars across the Hertzsprung-R…
View article: KIC 4150611: A quadruply eclipsing heptuple star system with a <i>g</i>-mode period-spacing pattern
KIC 4150611: A quadruply eclipsing heptuple star system with a <i>g</i>-mode period-spacing pattern Open
Context. KIC 4150611 is a high-order (seventh-order) multiple composed of a triple system with: a F1V primary (Aa), which is eclipsed on a 94.2 d period by a tight binary composed of two K/M dwarfs (Ab1 and Ab2) that also eclipse each othe…
View article: Asteroseismic modelling of fast rotators and its opportunities for astrophysics
Asteroseismic modelling of fast rotators and its opportunities for astrophysics Open
Rotation matters for the life of a star. It causes a multitude of dynamical phenomena in the stellar interior during a star’s evolution, and its effects accumulate until the star dies. All stars rotate at some level, but most of those born…
View article: KIC 4150611: A quadruply eclipsing heptuple star system with a g-mode period-spacing pattern Asteroseismic modelling of the g-mode period-spacing pattern
KIC 4150611: A quadruply eclipsing heptuple star system with a g-mode period-spacing pattern Asteroseismic modelling of the g-mode period-spacing pattern Open
In this work, we aim to estimate the stellar parameters of the primary (Aa) by performing asteroseismic analysis on its period-spacing pattern. We use the C-3PO neural network to perform asteroseismic modelling of the g-mode period-spacing…
View article: HD 34736: an intensely magnetised double-lined spectroscopic binary with rapidly rotating chemically peculiar B-type components
HD 34736: an intensely magnetised double-lined spectroscopic binary with rapidly rotating chemically peculiar B-type components Open
We report the results of a comprehensive study of the spectroscopic binary (SB2) system HD 34736 hosting two chemically peculiar (CP) late B-type stars. Using new and archival observational data, we characterize the system and its componen…
View article: The impact of asteroseismically calibrated internal mixing on nucleosynthetic wind yields of massive stars
The impact of asteroseismically calibrated internal mixing on nucleosynthetic wind yields of massive stars Open
Context. Asteroseismology gives us the opportunity to look inside stars and determine their internal properties, such as the radius and mass of the convective core. Based on these observations, estimations can be made for the amount of the…
View article: KIC 4150611: A quadruply eclipsing heptuple star system with a <i>g</i>-mode period-spacing pattern
KIC 4150611: A quadruply eclipsing heptuple star system with a <i>g</i>-mode period-spacing pattern Open
Context. KIC 4150611 is a high-order multiple composed of a triple system. It comprises: (1) a F1V primary (Aa) that is eclipsed on a 94.2d period by a tight 1.52d binary composed of two dim K/M dwarfs (Ab1 and Ab2), which also eclipse eac…
View article: KIC 4150611: A quadruply eclipsing heptuple star system with a g-mode period-spacing pattern Eclipse modelling of the triple and spectroscopic analysis
KIC 4150611: A quadruply eclipsing heptuple star system with a g-mode period-spacing pattern Eclipse modelling of the triple and spectroscopic analysis Open
KIC 4150611 is a high-order multiple composed of a triple system composed of the F1V primary (Aa), which is eclipsed on a 94.2d period by a tight 1.52d binary composed of two dim K/M dwarfs (Ab1, Ab2), which also eclipse each other; an 8.6…
View article: The impact of asteroseismically calibrated internal mixing on nucleosynthetic wind yields of massive stars
The impact of asteroseismically calibrated internal mixing on nucleosynthetic wind yields of massive stars Open
Asteroseismology gives us the opportunity to look inside stars and determine their internal properties. Based on these observations, estimations can be made for the amount of the convective boundary mixing and envelope mixing of such stars…
View article: Automated eccentricity measurement from raw eclipsing binary light curves with intrinsic variability
Automated eccentricity measurement from raw eclipsing binary light curves with intrinsic variability Open
Context. Eclipsing binary systems provide the opportunity to measure the fundamental parameters of their component stars in a stellar-model-independent way. This makes them ideal candidates for testing and calibrating theories of stellar s…
View article: Automated eccentricity measurement from raw eclipsing binary light curves with intrinsic variability
Automated eccentricity measurement from raw eclipsing binary light curves with intrinsic variability Open
abridged. Eclipsing binary systems provide the opportunity to measure the fundamental parameters of their component stars in a stellar-model-independent way. This makes them ideal candidates for testing and calibrating theories of stellar …
View article: Observational mapping of the mass discrepancy in eclipsing binaries: Selection of the sample and its photometric and spectroscopic properties
Observational mapping of the mass discrepancy in eclipsing binaries: Selection of the sample and its photometric and spectroscopic properties Open
Context . Eclipsing spectroscopic double-lined binaries are the prime source of precise and accurate measurements of masses and radii of stars. These measurements provide a stringent test for models of stellar evolution that are consistent…
View article: Thales of Miletus. Basic Theorems and their Applications in Geometry
Thales of Miletus. Basic Theorems and their Applications in Geometry Open
This paper deals with the life and scientific heritage of Thales of Miletus, one of the leading mathematicians and astronomers of Ancient Greece, who is considered one of the seven great sages of the world. Particular attention is paid to …
View article: Observational mapping of the mass discrepancy in eclipsing binaries: Selection of the sample and its photometric and spectroscopic properties
Observational mapping of the mass discrepancy in eclipsing binaries: Selection of the sample and its photometric and spectroscopic properties Open
Abridged. Eclipsing spectroscopic double-lined binaries are the prime source of precise and accurate measurements of masses and radii of stars. These measurements provide a stringent test of models of stellar evolution that are persistentl…
View article: Asteroseismic Modelling of Fast Rotators and its Opportunities for Astrophysics
Asteroseismic Modelling of Fast Rotators and its Opportunities for Astrophysics Open
Rotation matters for the life of a star. It causes a multitude of dynamical phenomena in the stellar interior during a star's evolution and its effects accumulate until the star dies. All stars rotate at some level but those born with a ma…
View article: MELCHIORS: The Mercator Library of High Resolution Stellar Spectroscopy
MELCHIORS: The Mercator Library of High Resolution Stellar Spectroscopy Open
Over the past decades, libraries of stellar spectra have been used in a large variety of science cases, including as sources of reference spectra for a given object or a given spectral type. Despite the existence of large libraries and the…
View article: MELCHIORS
MELCHIORS Open
Aims . Over the past decades, libraries of stellar spectra have been used in a large variety of science cases, including as sources of reference spectra for a given object or a given spectral type. Despite the existence of large libraries …
View article: PlatoSim: an end-to-end PLATO camera simulator for modelling high-precision space-based photometry
PlatoSim: an end-to-end PLATO camera simulator for modelling high-precision space-based photometry Open
Context. PLAnetary Transits and Oscillations of stars (PLATO) is the ESA M3 space mission dedicated to detect and characterise transiting exoplanets including information from the asteroseismic properties of their stellar hosts. The uninte…
View article: Probing the physics in the core boundary layers of the double-lined B-type binary KIC 4930889 from its gravito-inertial modes
Probing the physics in the core boundary layers of the double-lined B-type binary KIC 4930889 from its gravito-inertial modes Open
Context. Stellar evolution models of B-type stars are still uncertain in terms of internal mixing properties, notably in the area between the convective core and the radiative envelope. This impacts age determination of such stars in addit…
View article: Probing the physics in the core boundary layers of the double-lined B-type binary KIC4930889 from its gravito-inertial modes
Probing the physics in the core boundary layers of the double-lined B-type binary KIC4930889 from its gravito-inertial modes Open
Stellar evolution models of B-type stars are still uncertain in terms of internal mixing properties, notably in the area between the convective core and the radiative envelope. This impacts age determination of such stars in addition to th…
View article: A search for magnetic δ Scuti stars in <i>Kepler</i> hybrid candidates
A search for magnetic δ Scuti stars in <i>Kepler</i> hybrid candidates Open
Numerous candidate hybrid stars of type δ Scuti–γ Doradus have been identified with the Kepler satellite. However, many of them lie outside the theoretically expected instability strip for hybrid pulsation, where δ Sct and γ Dor pulsations…
View article: A search for magnetic $δ$ Scuti stars in Kepler hybrid candidates
A search for magnetic $δ$ Scuti stars in Kepler hybrid candidates Open
Numerous candidate hybrid stars of type $δ$ Scuti - $γ$ Doradus have been identified with the Kepler satellite. However, many of them lie outside the theoretically expected instability strip for hybrid pulsation, where $δ$ Sct and $γ$ Dor …
View article: The ESO UVES/FEROS Large Programs of TESS OB pulsators
The ESO UVES/FEROS Large Programs of TESS OB pulsators Open
Context. Modern stellar structure and evolution theory suffers from a lack of observational calibration for the interior physics of intermediate- and high-mass stars. This leads to discrepancies between theoretical predictions and observed…