AUTHOR=Balona Luis A. 

TITLE=The Hot Limit of Solar-like Oscillations From Kepler Photometry

JOURNAL=Frontiers in Astronomy and Space Sciences

VOLUME=Volume 7 - 2020

YEAR=2020

URL=https://www.frontiersin.org/journals/astronomy-and-space-sciences/articles/10.3389/fspas.2020.529025

DOI=10.3389/fspas.2020.529025

ISSN=2296-987X

ABSTRACT=Kepler short-cadence photometry of 2347 stars with effective temperatures in the range 6000
– 10000 K was used to search for the presence of solar-like oscillations. The aim is to establish
the location of the hot end of the stochastic convective excitation mechanism and to what extent
it may overlap the δ Scuti/γ Doradus instability region. A simple but effective autocorrelation
method is described which is capable of detecting low-amplitude solar-like oscillations, but with
significant risk of a false detection. The location of the frequency of maximum oscillation power,
ν max , and the large frequency separation, ∆ν, is determined for 167 stars hotter than 6000 K,
of which 70 are new detections. Results indicate that the hot edge of excitation of solar-like
oscillations does not appear to extend into the δ Scuti/γ Doradus instability strip.