87 citations · 1k across the 27 of their papers we have counts for
27 papers
On the impact of the structural surface effect on global stellar properties and asteroseismic analyses
Andreas Christ Sølvsten Jørgensen, Josefina Montalbán, George C. Angelou +6
In a series of papers, we have recently demonstrated that it is possible to construct stellar structure models that robustly mimic the stratification of multi-dimensional radiative…
Weighing stars from birth to death: mass determination methods across the HRD
Aldo Serenelli, Achim Weiss, Conny Aerts +31
The mass of a star is the most fundamental parameter for its structure, evolution, and final fate. It is particularly important for any kind of stellar archaeology and characteriza…
Convective boundary mixing in low- and intermediate-mass stars I. Core properties from pressure-mode asteroseismology
George C Angelou, Earl P. Bellinger, Saskia Hekker +3
Convective boundary mixing (CBM) is ubiquitous in stellar evolution. It is a necessary ingredient in the models in order to match observational constraints from clusters, binaries…
Detection and characterisation of oscillating red giants: first results from the TESS satellite
Víctor Silva Aguirre, Dennis Stello, Amalie Stokholm +78
Since the onset of the `space revolution' of high-precision high-cadence photometry, asteroseismology has been demonstrated as a powerful tool for informing Galactic archaeology in…
Bayesian inference of stellar parameters based on 1D stellar models coupled with 3D envelopes
Andreas Christ Sølvsten Jørgensen, George C. Angelou
Stellar models utilising one-dimensional (1D), heuristic theories of convection fail to adequately describe the energy transport in superadiabatic layers. The improper modelling le…
The Detailed Science Case for the Maunakea Spectroscopic Explorer, 2019 edition
The MSE Science Team, Carine Babusiaux, Maria Bergemann +258
(Abridged) The Maunakea Spectroscopic Explorer (MSE) is an end-to-end science platform for the design, execution and scientific exploitation of spectroscopic surveys. It will unvei…
Stellar Astrophysics and Exoplanet Science with the Maunakea Spectroscopic Explorer (MSE)
Maria Bergemann, Daniel Huber, Vardan Adibekyan +70
The Maunakea Spectroscopic Explorer (MSE) is a planned 11.25-m aperture facility with a 1.5 square degree field of view that will be fully dedicated to multi-object spectroscopy. A…
Mending the structural surface effect of 1D stellar structure models with non-solar metallicities based on interpolated 3D envelopes
Andreas Christ Sølvsten Jørgensen, Achim Weiss, George Angelou +1
1D stellar evolution codes employ rudimentary treatments of turbulent convection. For stars with convective envelopes, this leads to systematic errors in the predicted oscillation…
Tidal interactions between binary stars drives lithium production in low-mass red giants
Andrew R. Casey, Anna Y. Q. Ho, Melissa Ness +9
Theoretical models of stellar evolution predict that most of the lithium inside a star is destroyed as the star becomes a red giant. However, observations reveal that about 1% of r…
Stellar ages, masses and radii from asteroseismic modeling are robust to systematic errors in spectroscopy
Earl P. Bellinger, Saskia Hekker, George C. Angelou +2
The search for twins of the Sun and Earth relies on accurate characterization of stellar and exoplanetary parameters: i.e., ages, masses, and radii. In the modern era of asteroseis…
Mode Classification in Fast-Rotating Stars using a Convolutional Neural Network: Model-Based Regular Patterns in Scuti Stars
Giovanni M. Mirouh, George C. Angelou, Daniel R. Reese +1
Oscillation modes in fast-rotating stars can be split into several subclasses, each with their own properties. To date, seismology of these stars cannot rely on regular pattern ana…
Mitigating the mass dependence in the scaling relation of red-giant stars
Elisabeth Guggenberger, Saskia Hekker, George C. Angelou +2
The masses and radii of solar-like oscillators can be estimated through the asteroseismic scaling relations. These relations provide a direct link between observables, i.e. effecti…
Stellar Parameters in an Instant with Machine Learning: Application to Kepler LEGACY Targets
Earl P. Bellinger, George C. Angelou, Saskia Hekker +3
With the advent of dedicated photometric space missions, the ability to rapidly process huge catalogues of stars has become paramount. Bellinger and Angelou et al. (2016) recently…
On The Statistical Properties of the Lower Main Sequence
George C. Angelou, Earl P. Bellinger, Saskia Hekker +1
Astronomy is in an era where all-sky surveys are mapping the Galaxy. The plethora of photometric, spectroscopic, asteroseismic and astrometric data allows us to characterise the co…
Fundamental Parameters of Main-Sequence Stars in an Instant with Machine Learning
Earl P. Bellinger, George C. Angelou, Saskia Hekker +3
Owing to the remarkable photometric precision of space observatories like Kepler, stellar and planetary systems beyond our own are now being characterized en masse for the first ti…
Diagnostics of Stellar Modelling from Spectroscopy and Photometry of Globular Clusters
George Angelou, Valentina D'Orazi, Thomas Constantino +3
We conduct a series of comparisons between spectroscopic and photometric observations of globular clusters and stellar models to examine their predictive power. Data from medium-to…
Lithium abundances in globular cluster giants: NGC 1904, NGC 2808, and NGC 362
V. D'Orazi, R. G. Gratton, G. C. Angelou +7
The presence of multiple populations in globular clusters has been well established thanks to high-resolution spectroscopy. It is widely accepted that distinct populations are a co…
On the serendipitous discovery of a Li-rich giant in the globular cluster NGC 362
Valentina D'Orazi, Raffaele G. Gratton, George C. Angelou +6
We have serendipitously identified the first lithium-rich giant star located close to the red giant branch bump in a globular cluster. Through intermediate-resolution FLAMES spectr…
On the Numerical Treatment and Dependence of Thermohaline Mixing in Red Giants
John Lattanzio, Lionel Siess, Ross Church +5
In recent years much interest has been shown in the process of thermohaline mixing in red giants. In low and intermediate mass stars this mechanism first activates at the position…
Lithium abundances in globular cluster giants: NGC 6218 (M12) and NGC 5904 (M5)
Valentina D'Orazi, George C. Angelou, Raffaele G. Gratton +5
Convergent lines of evidence suggest that globular clusters host multiple stellar populations. It appears that they experience at least two episodes of star formation whereby a fra…
Sodium content as a predictor of the advanced evolution of globular cluster stars
Simon W. Campbell, Valentina D'Orazi, David Yong +6
The asymptotic giant branch (AGB) phase is the final stage of nuclear burning for low-mass stars. Although Milky Way globular clusters are now known to harbour (at least) two gener…
The Asymptotic Giant Branches of GCs: Selective Entry Only
S. W. Campbell, V. D'Orazi, T. N. Constantino +7
The handful of available observations of AGB stars in Galactic Globular Clusters suggest that the GC AGB populations are dominated by cyanogen-weak stars. This contrasts strongly w…
Fluorine variations in the globular cluster NGC 6656 (M22): implications for internal enrichment timescales
Valentina D'Orazi, Sara Lucatello, Maria Lugaro +8
Observed chemical (anti)correlations in proton-capture elements among globular cluster stars are presently recognized as the signature of self-enrichment from now extinct, previous…
The Role of Thermohaline Mixing in Intermediate- and Low-Metallicity Globular Clusters
George C. Angelou, Richard J. Stancliffe, Ross P. Church +2
It is now widely accepted that globular cluster red giant branch stars owe their strange abundance patterns to a combination of pollution from progenitor stars and in situ extra mi…