Detection of p-mode Oscillations in HD 35833 with NEID and TESS

We report the results of observations of p-mode oscillations in the G0 subgiant star HD 35833 in both radial
velocities and photometry with NEID and TESS, respectively. We achieve separate, robust detections of the
oscillation signal with both instruments (radial velocity amplitude ARV = 1.11 ± 0.09 m s−1, photometric amplitude
Aphot = 6.42 ± 0.60 ppm, frequency of maximum power nmax = 595.71  17.28 μHz, and mode spacing
Δν = 36.65 ± 0.96 μHz) as well as a nondetection in a TESS sector concurrent with the NEID observations. These
data shed light on our ability to mitigate the correlated noise impact of oscillations with radial velocities alone and
on the robustness of commonly used asteroseismic scaling relations. The NEID data are used to validate models for
the attenuation of oscillation signals for exposure times t max
< n-1 , and we compare our results to predictions from
theoretical scaling relations and find that the observed amplitudes are weaker than expected by >4σ, hinting at
gaps in the underlying physical models.