Detection of Solar-like Oscillations in Sub-giant and Red Giant Stars Using 2-minute Cadence TESS Data

Abstract

Based on all 2-minute cadence $TESS$ light curves from Sector 1 to 60, we provide a catalog of 8,651 solar-like oscillators, including frequency at maximum power ($\hat{I}{½}_{\max }$, with its median precision, $\ddot{I}ƒ$=5.39\%), large frequency separation ($\hat{I}”\hat{I}½$, $\ddot{I}ƒ$=6.22\%), seismically derived masses, radii, and surface gravity. In this sample, we have detected 2,173 new oscillators and added 4,373 new $\hat{I}”\hat{I}½$ measurements. Our seismic parameters are consistent with those from $Kepler$, $K2$, and previous $TESS$ data. The median fractional residual in $\hat{I}{½}_{\max }$ is $1.63\%$ with a scatter of $14.75\%$, and in $\hat{I}”\hat{I}½$ it is $0.11\%$ with a scatter of $10.76\%$. We have detected 476 solar-like oscillators with $\hat{I}{½}_{\max }$ exceeding the $Nyquist$ frequency of $Kepler$ long-cadence data during the evolutionary phases of sub-giant and the base of the red-giant branch, which provide a valuable resource for understanding angular momentum transport.