2024ApJ...973..157C

Query : 2024ApJ...973..157C

2024ApJ...973..157C - Astrophys. J., 973, 157 (2024/October-1)

Caught in the Act: Observations of the Double-mode RR Lyrae V338 Boo during the Disappearance of a Pulsation Mode.

CARRELL K., WILHELM R., TOM A., SMITH H., POPOWICZ A., HUG G., BRINCAT S.M., SALVAGGIO F., NAKONECHNY K., LEE D., ARRANZ HERAS T., VALE T., MORTARI D., STEENKAMP A., ROGGE R. and CHECINSKI J.

Abstract (from CDS):

New results on the behavior of the double-mode RR Lyrae V338 Boo are presented. The Transiting Exoplanet Survey Satellite (TESS) observed this star again in 2022, and an observing campaign of the American Association of Variable Star Observers (AAVSO) was completed after the TESS observations as a follow-up. We find that the first overtone pulsation mode in this star completely disappears during the TESS observing window. This mode reappears at the end of the TESS observations, and the AAVSO observing campaign shows that in the months that followed, the first overtone mode was not only present but was the dominant mode of pulsation. This star, and potentially others like it, could hold the key to finally solving the mystery of the Blazhko effect in RR Lyrae.

Abstract Copyright: © 2024. The Author(s). Published by the American Astronomical Society.

Journal keyword(s): RR Lyrae variable stars - RRd variable stars - Pulsating variable stars - Light curves - Space telescopes

Simbad objects: 5

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Number of rows : 5
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 V* AQ Leo RR* 11 23 55.2752313792 +10 18 59.076153504           kA5hF3.5 88 0
2 M 3 GlC 13 42 11.62 +28 22 38.2     6.39     ~ 2593 0
3 NGC 5272 1041 RR* 13 42 14.7094647888 +28 28 31.576265364   15.62 15.62     ~ 49 0
4 V* V338 Boo RR* 15 46 26.1422205480 +44 18 47.172522024   12.76 13.00     ~ 17 0
5 M 15 GlC 21 29 58.33 +12 10 01.2           ~ 3274 0

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