Asteroseismology using quadrupolar f -modes revisited: Breaking of universal relationships in the slow hadron-quark conversion scenario [PDF]
Physical Review D, 2023 In this work, we consider polar perturbations and we calculate the frequency and damping time of the quadrupolar fundamental f -mode of compact objects, constructed using a wide range of model-independent hybrid equations of state that include quark ...
I. F. Ranea-Sandoval +4 more
semanticscholar +1 more source
Gravitational-wave asteroseismology with fundamental modes from compact binary inspirals. [PDF]
Nat Commun, 2020 Gravitational waves (GWs) from binary neutron stars encode unique information about ultra-dense matter through characterisic signatures associated with a variety of phenomena including tidal effects during the inspiral.
Pratten G, Schmidt P, Hinderer T.
europepmc +3 more sources
Age-dating the young open cluster UBC1 with g-mode asteroseismology, gyrochronology, and isochrone fitting [PDF]
Astronomy & Astrophysics, 2023 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.
D. Fritzewski +5 more
semanticscholar +1 more source
Asteroseismology of the young open cluster NGC 2516. I. Photometric and spectroscopic observations [PDF]
Astronomy & Astrophysics, 2023 Asteroseismic modelling of isolated stars presents significant challenges due to the difficulty in accurately determining stellar parameters, particularly the stellar age.
Gang Li +10 more
semanticscholar +1 more source
Mixed-mode Ensemble Asteroseismology of Low-luminosity Kepler Red Giants [PDF]
Astrophysical Journal, 2023 We present measurements of the dipole mode asymptotic period spacing (ΔΠ1), the coupling factor between the p- and g-modes (q), the g-mode phase offset (ϵ g ), and the mixed-mode frequency rotational splitting (δ ν rot) for 1074 low-luminosity red giants
J. Kuszlewicz, M. Hon, D. Huber
semanticscholar +1 more source
Asteroseismology of δ Scuti stars: emulating model grids using a neural network [PDF]
Monthly notices of the Royal Astronomical Society, 2023 Young δ Scuti stars have proven to be valuable asteroseismic targets but obtaining robust uncertainties on their inferred properties is challenging. We aim to quantify the random uncertainties in grid-based modelling of δ Sct stars.
O. Scutt +5 more
semanticscholar +1 more source
A 20 Second Cadence View of Solar-type Stars and Their Planets with TESS: Asteroseismology of Solar Analogs and a Recharacterization of π Men c [PDF]
Astronomical Journal, 2021 We present an analysis of the first 20 second cadence light curves obtained by the TESS space telescope during its extended mission. We find improved precision of 20 second data compared to 2 minute data for bright stars when binned to the same cadence (≈
D. Huber +52 more
semanticscholar +1 more source
The asteroseismology metacomputer [PDF]
Open Astronomy, 2000 Submitted to Baltic Astronomy, 5 pages, plain TeX, uses balticw ...
Metcalfe Τ. S., Nather R. E.
openaire +3 more sources
On the Diversity of Mixing and Helium Core Masses of B-type Dwarfs from Gravity-mode Asteroseismology [PDF]
Astrophysical Journal, 2022 The chemical evolution of the galaxy is largely guided by the yields from massive stars. Their evolution is heavily influenced by their internal mixing, allowing the stars to live longer and yield a more massive helium core at the end of their main ...
M. G. Pedersen
semanticscholar +1 more source
Asteroseismology of 3642 Kepler Red Giants: Correcting the Scaling Relations Based on Detailed Modeling [PDF]
Astrophysical Journal, 2022 This paper presents a correction to the scaling relations for red giant stars using model-based masses and radii. We measure radial-mode frequencies from Kepler observations for 3642 solar-like oscillators on the red giant branch and use them to ...
Tanda 坦达 Li 李 +5 more
semanticscholar +1 more source