TY - JOUR
T1 - The Changing Lightcurve of the Double-mode RR Lyrae Variable Star V338 Boo
AU - Carrell, Kenneth
AU - Wilhelm, Ronald
AU - Olsen, Faith
AU - Tom, Andrew
AU - Vetters, Garath
AU - McElhannon, Anna
N1 - Publisher Copyright:
© 2021. The American Astronomical Society. All rights reserved.
PY - 2021/8/1
Y1 - 2021/8/1
N2 - We present an analysis of the lightcurve extracted from Transiting Exoplanet Survey Satellite (TESS) Full Frame Images (FFIs) of the double-mode RR Lyrae V338 Boo. We find that the fundamental mode pulsation is changing in amplitude across the 54 days of observations. The first overtone mode pulsation also changes, but on a much smaller scale. Harmonics and combinations of the primary pulsation modes also exhibit unusual behavior. Possible connections with other changes in RR Lyrae pulsations are discussed, but a full understanding of the cause of the changes seen in V338 Boo should shed light on some of the most difficult and unanswered questions in stellar pulsation theory, and astrophysics more generally.
AB - We present an analysis of the lightcurve extracted from Transiting Exoplanet Survey Satellite (TESS) Full Frame Images (FFIs) of the double-mode RR Lyrae V338 Boo. We find that the fundamental mode pulsation is changing in amplitude across the 54 days of observations. The first overtone mode pulsation also changes, but on a much smaller scale. Harmonics and combinations of the primary pulsation modes also exhibit unusual behavior. Possible connections with other changes in RR Lyrae pulsations are discussed, but a full understanding of the cause of the changes seen in V338 Boo should shed light on some of the most difficult and unanswered questions in stellar pulsation theory, and astrophysics more generally.
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U2 - 10.3847/2041-8213/ac1202
DO - 10.3847/2041-8213/ac1202
M3 - Article
AN - SCOPUS:85112672844
SN - 2041-8205
VL - 916
JO - Astrophysical Journal Letters
JF - Astrophysical Journal Letters
IS - 2
M1 - L12
ER -