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Far Ultraviolet Spectroscopic Explorer Observations of the Active Cool Star AB Doradus

  • Authors: T. B. Ake, A. K. Dupree, P. R. Young, J. L. Linsky, R. F. Malina, N. W. Griffiths, O. H. W. Siegmund, and B. E. Woodgate

Ake et al. 2000 The Astrophysical Journal Letters 538 L87.

  • Provider: AAS Journals

Caption: Fig. 2.

Top: O VI doublet, time‐integrated over the 1999 October 22 exposures with the LiF1A channel. A two‐component Gaussian fit is required for the λ1032 line. Shown are the Gaussians after rotational and instrumental broadening (dotted lines), the final fit (thick line), and the same profile shifted and scaled by a factor of 2 for λ1037 (dashed line). Stellar C II emission is noted shortward of O VI λ1037, with interstellar or circumstellar C II λ1036 absorption superimposed. Bottom: Flare profiles are shown averaged over a 2500 s active period of the star. Redshifted material at +235 km s−1, extending to 600 km s−1, is found in O VI, as well as sharp emission components near line center. The dashed line is the two‐component fit from the time‐integrated profile in the top panel.

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