An Examination of ATO J031.2309+52.9923, a δ Scuti Variable from the ATLAS Survey

Volume 50 number 2 (2022)

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Eric G. Hintz

Department of Physics and Astronomy, Brigham Young University, N283 ESC, Provo, UT 84602; hintz@byu.edu

Jarrod L. Hansen

Department of Physics and Astronomy, Brigham Young University, N283 ESC, Provo, UT 84602; starwarsjarrod@hotmail.com

Denise C. Stephens

Department of Physics and Astronomy, Brigham Young University, N283 ESC, Provo, UT 84602; denise_stephens@byu.edu

Benjamin J. Derieg

Department of Physics and Astronomy, Brigham Young University, N283 ESC, Provo, UT 84602; bderieg@deriegfamily.com

Abstract

As part of our variable star follow-up program we have examined a number of stars from the ATLAS (Asteroid Terrestrial-impact Last Alert System) survey. The first of these, ATO J031.2309+52.9923, was reported with a period of 0.069705 d. Our revised period is 0.06970555 d, but we find an additional period of 0.074 d. We also report a suspected period change of (1 / P) dP / dT = –340 × 10–8 yr–1. In addition to the primary period, we find two additional closely spaced periods of 0.07380 d and 0.07338 d, with a period ratio of P1 / P2 = 0.945. The period ratio and change would indicate that this object is a δ Scuti variable with non-radial pulsations. We find that this target fits into the medium amplitude group of δ Scuti variables such as AN Lyncis.