Figure 2 from OGLE-GAL-ACEP-091: The First Known Multi-mode Anomalous Cepheid

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OGLE-GAL-ACEP-091: The First Known Multi-mode Anomalous Cepheid

Authors: I. Soszyński, R. Smolec, A. Udalski, M.K. Szymański, P. Pietrukowicz, D.M. Skowron, J. Skowron, P. Mróz, R. Poleski, S. Kozłowski, P. Iwanek, M. Wrona, M. Gromadzki, K. Ulaczyk, and K. Rybicki

2020 The Astrophysical Journal Letters 901 L25.

Provider: AAS Journals

Caption: Figure 2.

Petersen diagram for multi-mode Cepheids and RR Lyr stars in the Milky Way (blue symbols), LMC (green symbols), and SMC (yellow symbols). Filled circles mark double-mode classical Cepheids, triangles—triple-mode Cepheids, empty circles—double-mode type II Cepheids, dots—RR Lyr (RRd) stars. Period ratios of OGLE-GAL-ACEP-091 are marked by red triangles.

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