Simultaneous SONG radial velocities and TESS photometry of the subgiant beta Aql yield a photometry-to-velocity amplitude ratio of 26.6 +/- 3.1 ppm/(m/s) and an intensity-velocity phase shift of -113 +/- 7 degrees, both consistent with solar values after temperature scaling.
Solar-like Oscillations: An Observational Perspective
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abstract
Solar-like oscillations are excited stochastically by convection. They occur in stars with an outer convection zone, which includes the Sun and other stars on the lower main sequence, as well as cool subgiants and red giants. This chapter reviews the basic properties of solar-like oscillations and summarises some of the main observational results. Mixed modes in subgiants and red giants are discussed in some detail, including an introduction to the so-called p-g diagram for avoided crossings.
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Asteroseismology of the G8 subgiant beta Aquilae with SONG-Tenerife, SONG-Australia and TESS
Simultaneous SONG radial velocities and TESS photometry of the subgiant beta Aql yield a photometry-to-velocity amplitude ratio of 26.6 +/- 3.1 ppm/(m/s) and an intensity-velocity phase shift of -113 +/- 7 degrees, both consistent with solar values after temperature scaling.