A search for variable subdwarf B stars in TESS Full Frame Images III. An update on variable targets in both ecliptic hemispheres -- contamination analysis and new sdB pulsators

• Main Authors: Sahoo, S. K, Baran, A. S, Worters, H. L, Németh, P, Kilkenny, D
• Format: Journal Article
• Language: English
• Published: 03-01-2023
• Subjects: Physics - Solar and Stellar Astrophysics
• DOI: 10.48550/arxiv.2301.01082

Monthly Notices of the Royal Astronomical Society, Volume 519,
Issue 2, February 2023, Pages 2486-2499 We present an update on the variable star survey performed on the TESS 30 min
Full Frame Image (FFI) data reported by our first two papers in this series.
This update includes a contamination analysis in order to identify false
positives and analysis of the TESS 10 min FFI data collected during Years 3 and
4 of the mission. We clarify the variability status of 2 995 targets
identifying 1 403 variable stars. In addition, we spectroscopically classify 24
pre-filtered targets sampled with the 10 min FFI data and discover 11 new sdB
pulsators. Future follow-up space- and/or ground-based data of variables
reported here, to identify the nature of their variability and reveal
spectroscopic parameters of the stars, would complement this work.