The dynamical mass of a classical Cepheid variable star in an eclipsing binary system

G. Pietrzyński, I. B. Thompson, W. Gieren, D. Graczyk, G. Bono, A. Udalski, I. Soszyński, D. Minniti, B. Pilecki

Resultado de la investigación: Article

65 Citas (Scopus)

Resumen

Stellar pulsation theory provides a means of determining the masses of pulsating classical Cepheid supergiants-it is the pulsation that causes their luminosity to vary. Such pulsational masses are found to be smaller than the masses derived from stellar evolution theory: this is the Cepheid mass discrepancy problem, for which a solution is missing. An independent, accurate dynamical mass determination for a classical Cepheid variable star (as opposed to type-II Cepheids, low-mass stars with a very different evolutionary history) in a binary system is needed in order to determine which is correct. The accuracy of previous efforts to establish a dynamical Cepheid mass from Galactic single-lined non-eclipsing binaries was typically about 15-30% (refs 6, 7), which is not good enough to resolve the mass discrepancy problem. In spite of many observational efforts, no firm detection of a classical Cepheid in an eclipsing double-lined binary has hitherto been reported. Here we report the discovery of a classical Cepheid in a well detached, double-lined eclipsing binary in the Large Magellanic Cloud. We determine the mass to a precision of 1% and show that it agrees with its pulsation mass, providing strong evidence that pulsation theory correctly and precisely predicts the masses of classical Cepheids.

Idioma originalEnglish
Páginas (desde-hasta)542-544
Número de páginas3
PublicaciónNature
Volumen468
N.º7323
DOI
EstadoPublished - 25 nov 2010

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Pietrzyński, G., Thompson, I. B., Gieren, W., Graczyk, D., Bono, G., Udalski, A., ... Pilecki, B. (2010). The dynamical mass of a classical Cepheid variable star in an eclipsing binary system. Nature, 468(7323), 542-544. https://doi.org/10.1038/nature09598
Pietrzyński, G. ; Thompson, I. B. ; Gieren, W. ; Graczyk, D. ; Bono, G. ; Udalski, A. ; Soszyński, I. ; Minniti, D. ; Pilecki, B. / The dynamical mass of a classical Cepheid variable star in an eclipsing binary system. En: Nature. 2010 ; Vol. 468, N.º 7323. pp. 542-544.
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abstract = "Stellar pulsation theory provides a means of determining the masses of pulsating classical Cepheid supergiants-it is the pulsation that causes their luminosity to vary. Such pulsational masses are found to be smaller than the masses derived from stellar evolution theory: this is the Cepheid mass discrepancy problem, for which a solution is missing. An independent, accurate dynamical mass determination for a classical Cepheid variable star (as opposed to type-II Cepheids, low-mass stars with a very different evolutionary history) in a binary system is needed in order to determine which is correct. The accuracy of previous efforts to establish a dynamical Cepheid mass from Galactic single-lined non-eclipsing binaries was typically about 15-30{\%} (refs 6, 7), which is not good enough to resolve the mass discrepancy problem. In spite of many observational efforts, no firm detection of a classical Cepheid in an eclipsing double-lined binary has hitherto been reported. Here we report the discovery of a classical Cepheid in a well detached, double-lined eclipsing binary in the Large Magellanic Cloud. We determine the mass to a precision of 1{\%} and show that it agrees with its pulsation mass, providing strong evidence that pulsation theory correctly and precisely predicts the masses of classical Cepheids.",
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Pietrzyński, G, Thompson, IB, Gieren, W, Graczyk, D, Bono, G, Udalski, A, Soszyński, I, Minniti, D & Pilecki, B 2010, 'The dynamical mass of a classical Cepheid variable star in an eclipsing binary system', Nature, vol. 468, n.º 7323, pp. 542-544. https://doi.org/10.1038/nature09598

The dynamical mass of a classical Cepheid variable star in an eclipsing binary system. / Pietrzyński, G.; Thompson, I. B.; Gieren, W.; Graczyk, D.; Bono, G.; Udalski, A.; Soszyński, I.; Minniti, D.; Pilecki, B.

En: Nature, Vol. 468, N.º 7323, 25.11.2010, p. 542-544.

Resultado de la investigación: Article

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Pietrzyński G, Thompson IB, Gieren W, Graczyk D, Bono G, Udalski A y otros. The dynamical mass of a classical Cepheid variable star in an eclipsing binary system. Nature. 2010 nov 25;468(7323):542-544. https://doi.org/10.1038/nature09598