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- W2292912279 abstract "N umerical calculations of the structure of accretion shocks in T Tauri stars (TTSs) indicate that the C m)1909, O m)1661+1666 and Si m)1892 ultraviolet lines should have comparable intensities. We show how the density and the velocity of the accreted gas can be derived from these lines ratios. We also indicate how these parameters can be used, together with other less reliable as the distance and the extinction, to derive the accretion rate and the accretion luminosity. It is shown that the lines ratios as well as their absolute fluxes (as measured with the International Ultraviolet Explorer) are in agreement with the predictions of the accretion shock model. However this method is best suited for the analysis of high resolution data (as those obtained with the Hubble Space Telescope) from which accurate fluxes can be determined and blended components (stellar atmosphere, winds) can al so be properly substracted out." @default.
- W2292912279 created "2016-06-24" @default.
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- W2292912279 date "1999-01-01" @default.
- W2292912279 modified "2023-09-26" @default.
- W2292912279 title "Accretion shocks in T Tauri stars. Diagnosis semiforbidden UV lines ratios. ." @default.
- W2292912279 hasPublicationYear "1999" @default.
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