V470 Cas and GSC 2901-00089, Two New Double-mode Cepheids
A. V. Khruslov, A.V. Kusakin
TL;DR
This study identifies and characterizes two new double-mode Cepheids, V470 Cas and GSC 2901-00089, using archival and CCD observations, revealing their pulsation modes and period variations.
Contribution
The paper reports the discovery and detailed analysis of two new double-mode Cepheids, including their pulsation modes and period changes, expanding the catalog of known such stars.
Findings
Confirmed double periodicity in V470 Cas and GSC 2901-00089.
Detected period variations in the first overtone modes.
Placed the stars on the Petersen diagram for Galactic 1O/2O Cepheids.
Abstract
We present a photometric study of two new double-mode Cepheids, pulsating in the first and second overtones modes: V470 Cas and GSC 2901-00089. For the search of the double-mode variability, we used all available observations from the ROTSE-I/NSVS and SuperWASP online public archives. Our multicolour CCD observations in the B, V and R bands in Johnson's system confirm the double periodicity of these variables. We study period variations of the two stars; variations of the first overtone periods were reliably detected. In addition, we consider the Petersen diagram for the Galactic 1O/2O Cepheids.
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Taxonomy
TopicsStellar, planetary, and galactic studies · Astronomy and Astrophysical Research · Adaptive optics and wavefront sensing