210 citations · 1.3k across the 44 of their papers we have counts for
44 papers
Isochrone-cloud fitting and asteroseismology of the Kepler open cluster NGC6866
Haotian Wang, Gang Li, Dario J. Fritzewski +2
We investigate how isochrones computed with different input physics and initial conditions affect the age dating of the open cluster NGC 6866, and compare the results with asterose…
KIC 4150611: A quadruply eclipsing heptuple star system with a g-mode period-spacing pattern Eclipse modelling of the triple and spectroscopic analysis
Alex Kemp, Andrew Tkachenko, Guillermo Torres +8
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…
Age uncertainties of red giants due to cumulative rotational mixing of progenitors calibrated by asteroseismology
D. J. Fritzewski, C. Aerts, J. S. G. Mombarg +2
Galactic archaeology largely relies on precise ages of distant evolved stars in the Milky Way. Nowadays, asteroseismology can deliver ages for many red giants observed with high-ca…
Physical properties of the eclipsing binary KIC 9851944 and analysis of its tidally-perturbed p- and g-mode pulsations
Zachary Jennings, John Southworth, Kresimir Pavlovski +1
Stars that are both pulsating and eclipsing offer an important opportunity to better understand many of the physical phenomena that occur in stars, because it is possible to measur…
Asteroseismology of the young open cluster NGC 2516 I: Photometric and spectroscopic observations
Gang Li, Conny Aerts, Timothy R. Bedding +8
Asteroseismic modelling of isolated star presents significant challenges due to the difficulty in accurately determining stellar parameters, particularly the stellar age. These cha…
Age-dating the young open cluster UBC 1 with g-mode asteroseismology, gyrochronology, and isochrone fitting
D. J. Fritzewski, T. Van Reeth, C. Aerts +3
UBC 1 is an open cluster discovered in Gaia data and located near the edge of the Transiting Exoplanet Survey Satellite's (TESS) continuous viewing zone. We aim to provide age cons…
Probing the physics in the core boundary layers of the double-lined B-type binary KIC4930889 from its gravito-inertial modes
Mathias Michielsen, Timothy Van Reeth, Andrew Tkachenko +1
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. Thi…
A massive helium star with a sufficiently strong magnetic field to form a magnetar
T. Shenar, G. A. Wade, P. Marchant +13
Magnetars are highly magnetized neutron stars; their formation mechanism is unknown. Hot helium-rich stars with spectra dominated by emission lines are known as Wolf-Rayet stars. W…
Unresolved Rossby and gravity modes in 214 A and F stars showing rotational modulation
Andreea I. Henriksen, Victoria Antoci, Hideyuki Saio +9
Here we report an ensemble study of 214 A- and F-type stars observed by \textit{Kepler}, exhibiting the so-called \textit{hump and spike} periodic signal, explained by Rossby modes…
The ESO UVES/FEROS Large Programs of TESS OB pulsators. I. Global stellar parameters from high-resolution spectroscopy
Nadya Serebriakova, Andrew Tkachenko, Sarah Gebruers +7
Modern stellar structure and evolution theory experiences a lack of observational calibrations for the interior physics of intermediate- and high-mass stars. This leads to discrepa…
Tidally perturbed g-mode pulsations in a sample of close eclipsing binaries
T. Van Reeth, C. Johnston, J. Southworth +4
Context. Thanks to the high-precision photometry from space missions such as Kepler and TESS, tidal perturbations and tilting of pulsations have been detected in more than a dozen…
High-mass eclipsing binaries: a testbed for models of interior structure and evolution -- Accurate fundamental properties and surface chemical composition for V1034 Sco, GL Car, V573 Car and V346 Cen
K. Pavlovski, J. Southworth, A. Tkachenko +2
The surface chemical compositions of stars are affected by physical processes which bring the products of thermonuclear burning to the surface. Despite their potential in understan…
Internal rotation and buoyancy travel time of 60 gamma Doradus stars from uninterrupted TESS light curves spanning 352 days
Stefano Garcia, Timothy Van Reeth, Joris De Ridder +1
Context. Gamma Doradus (hereafter ~Dor) stars are gravity-mode pulsators whose periods carry information about the internal structure of the star. These periods are especially s…
Tidal perturbations and eclipse mapping in the pulsations in the hierarchical triple system U~Gru
Cole Johnston, Andrew Tkachenko, Timothy Van Reeth +4
Context. Unambiguous examples of the influence of tides on self-excited, free stellar pulsations have recently been observationally detected in space-based photometric data. Aims.…
The Nature of Unseen Companions in Massive Single-Line Spectroscopic Binaries
Hugues Sana, Michael Abdul-Masih, Gareth Banyard +14
Massive stars are predominantly found in binaries and higher order multiples. While the period and eccentricity distributions of OB stars are now well established across different…
Spinning up the Surface: Evidence for Planetary Engulfment or Unexpected Angular Momentum Transport?
Jamie Tayar, Facundo D. Moyano, Melinda Soares-Furtado +15
In this paper, we report the potential detection of a nonmonotonic radial rotation profile in a low-mass lower-luminosity giant star. For most low- and intermediate-mass stars, the…
Four bright eclipsing binaries with gamma Doradus pulsating components: CM Lac, MZ Lac, RX Dra and V2077 Cyg
John Southworth, Timothy Van Reeth
The study of pulsating stars in eclipsing binaries holds the promise of combining two different ways of measuring the physical properties of a star to obtain improved constraints o…
The CubeSpec space mission: Asteroseismology of massive stars from time-series optical spectroscopy
D. M. Bowman, B. Vandenbussche, H. Sana +8
The ESA/KU Leuven CubeSpec mission is specifically designed to provide low-cost space-based high-resolution optical spectroscopy. Here we highlight the science requirements and cap…
Asteroseismology reveals the near-core magnetic field strength in the early-B star HD 43317
D. M. Bowman, D. Lecoanet, T. Van Reeth
Spectropolarimetic campaigns have established that large-scale magnetic fields are present at the surfaces of approximately 10% of massive dwarf stars. However, there is a dearth o…
Identifying quiescent compact objects in massive Galactic single-lined spectroscopic binaries
L. Mahy, H. Sana, T. Shenar +13
Aims. To search for these rare objects, we study 32 Galactic O-type stars that were reported as SB1s in the literature. In our sample we include Cyg X-1, which is known to host an…
Classifying Kepler light curves for 12,000 A and F stars using supervised feature-based machine learning
Nicholas H. Barbara, Timothy R. Bedding, Ben D. Fulcher +2
With the availability of large-scale surveys like Kepler and TESS, there is a pressing need for automated methods to classify light curves according to known classes of variable st…
Analysis of high-resolution FEROS spectroscopy for a sample of variable B-type stars assembled from TESS photometry
Sarah Gebruers, Andrew Tkachenko, Dominic M. Bowman +8
Spectroscopic data are necessary to break degeneracies in asteroseismic modelling of the interior structure in high- and intermediate-mass stars. We derive precise photospheric ste…
Multiple variability time-scales of the early nitrogen-rich Wolf-Rayet star WR7
J. A. Toalá, D. Bowman, T. Van Reeth +7
We present the analysis of the optical variability of the early, nitrogen-rich Wolf-Rayet (WR) star WR7. The analysis of multi-sector Transiting Exoplanet Survey Satellite (TESS) l…
The near-core rotation of HD 112429: a gamma Doradus star with TESS photometry and legacy spectroscopy
T. Van Reeth, P. De Cat, J. Van Beeck +8
The TESS space mission provides us with high-precision photometric observations of bright stars over more than 70% of the entire sky, allowing us to revisit and characterise well-k…