6 papers
Signatures of photospheric convection throughout the solar atmosphere: the EVE Sun-as-a-star mHz continuum
Hugh Hudson, Anne-Marie Broomhall, Lyndsay Fletcher +5
Convectively driven motions in the solar photosphere can generate broadband Doppler variability across the chromosphere, transition region and corona. Here we investigate this vari…
Minimising magnetic activity effects in PLATO observations: insights from the Sun-as-a-star
Jérôme Bétrisey, Anne-Marie Broomhall, Sylvain N. Breton +4
Recent studies showed that magnetic activity effects in solar-type stars can substantially bias seismic inferences, particularly age estimates, regardless of modelling strategy or…
Cycle dependence of helioseismic oscillations above the acoustic cut-off frequency
Dmitrii Kolotkov, Anne-Marie Broomhall, Laura Jade Millson +1
Helioseismic and recent asteroseismic observations reveal fine structure in the power spectrum with alternating peaks and troughs above the acoustic cut-off frequency. This structu…
Investigating magnetic activity cycles in solar-like oscillators using asteroseismic data from the K2 mission
Gleb Berloff, Anne-Marie Broomhall, George T. Hookway +3
We present the results of an investigation into the possible presence of magnetic activity cycles in stars observed in two observational campaigns by the K2 mission. This study was…
Frequency separation ratios do not suppress magnetic activity effects in solar-like stars
Jérôme Bétrisey, Anne-Marie Broomhall, Sylvain N. Breton +3
Magnetic activity effects are typically neglected in asteroseismic modelling of solar-type stars, presuming that these effects can be accounted for in the parametrisation of the su…
Influence of the magnetic activity cycle on mean density and acoustic radius inversions
Jérôme Bétrisey, Daniel R. Reese, Sylvain N. Breton +4
Asteroseismic modelling is crucial for upcoming missions like PLATO, CubeSpec, and Roman. Despite significant progress, discrepancies between observations and theoretical predictio…