SIMBAD references

2020ApJ...901L..25S - Astrophys. J., 901, L25-L25 (2020/October-1)

OGLE-GAL-ACEP-091: the first known multi-mode anomalous cepheid.

SOSZYNSKI I., SMOLEC R., UDALSKI A., SZYMANSKI M.K., PIETRUKOWICZ P., SKOWRON D.M., SKOWRON J., MROZ P., POLESKI R., KOZLOWSKI S., IWANEK P., WRONA M., GROMADZKI M., ULACZYK K. and RYBICKI K.

Abstract (from CDS):

Anomalous Cepheids (ACs) are metal-deficient, core-helium-burning pulsating stars with masses in the range 1.2-2.2 M. Until recently, all known ACs were pure single-mode pulsators. The first candidate for an AC pulsating in more than one radial mode-OGLE-GAL-ACEP-091-was recently identified in the Milky Way based on the photometric database of the Optical Gravitational Lensing Experiment (OGLE) survey. We analyze this object showing that it is actually a triple-mode pulsator. Its position in the Petersen diagram, the light-curve morphology quantified by Fourier coefficients, and absolute magnitudes derived from the Gaia parallax are consistent with the assumption that OGLE-GAL-ACEP-091 is an AC. Our grid of linear pulsation models indicates that OGLE-GAL-ACEP-091 is a 1.8 M star with a metallicity of about [Fe/H] = -0.5 dex.

Abstract Copyright: © 2020. The American Astronomical Society. All rights reserved.

Journal keyword(s): Anomalous Cepheid variable stars - Multi-periodic pulsation - Pulsating variable stars

Simbad objects: 10

goto Full paper

goto View the reference in ADS

To bookmark this query, right click on this link: simbad:2020ApJ...901L..25S and select 'bookmark this link' or equivalent in the popup menu


2021.04.20-12:44:36

© Université de Strasbourg/CNRS

    • Contact