TESS asteroseismology of the Kepler red giants

ABSTRACT Red giant asteroseismology can provide valuable information for studying the Galaxy as demonstrated by space missions like CoRoT and Kepler. However, previous observations have been limited to small data sets fields of view. The TESS mission provides far larger samples and, first time, opportunity perform asteroseimic inference from full-frame images full-sky, instead narrow pre-selected targets. Here, we seek detect oscillations in red giants Kepler field using 4-yr results a benchmark. Because use 1–2 sectors observation, our are representative typical scenario data. We clear ?3000 stars with another ?1000 borderline (low S/N) cases. In comparison, best-case predictions suggest ?4500 detectable oscillating giants. Of detections, measure ?? 570 stars, meaning ?20 per cent yield (14 one sector 26 two sectors). These yields imply that (1–2 sector) will result significant detection biases. Hence, boost number might need only ?max seismic input stellar property estimation. find little bias measurements scatter is about 5–6 2–3 ??. values, coupled uncertainties parallax, Teff, [Fe/H] grid-based approach, would internal 3 inferred radius, 6 mass, 20 age low-luminosity stars. Finally, seismology not significantly affected signal confusion blending Tmag ? 12.5.