The outburst of V 1057 CYG

Astronomy and Astrophysics – Astronomy

Scientific paper

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Infrared Astronomy, Stellar Evolution, Stellar Luminosity, T Tauri Stars, Variable Stars, A Stars, Atmospheric Models, Flares, Main Sequence Stars, Photosphere, Stellar Mass, Stellar Models, Stellar Temperature

Scientific paper

The behavior of the variable star V 1057 Cyg, which increased its brightness during an interval of a few months by almost six stellar magnitudes, is similar to that of the star FU Ori in 1936/37. It is known that V 1057 Cyg was a T Tauri star before the outburst. An analysis of the characteristics of the outburst of V 1057 Cyg provides, therefore, important information for a study of T Tauri stars and the theory of stellar development. Attention is given to details concerning the discovery of V 1057 Cyg, its study, the behavior of V 1057 Cyg before the outburst, models of the photosphere, infrared observations, the stellar mass, and an interpretation of the observed phenomena

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