Fernández Figueroa, María JoséCastro Rubio, Elisa deRego Fernández, Manuel2023-06-212023-06-211983Ayres, T., Linsky, J.L.: 1980, Astrophys. J. 235, 76 Ayres, T.R., Marstad, N.C., Linsky, J.L.: 1981, Astrophys. J. 247, 545 Barnes, J.G., Evans, D.S.: 1976, Monthly Notices Roy. Astron. Soc. 174, 489 Barnes, J.G., Evans, D.S., Parsons, S.B.: 1976, Monthly Notices Roy. Astron. Soc. 174, 503 Bogges, A., Carr, F.A., Evans, D.C., Fischel , D., Freeman, H.R., Fuechsel, C.F., Klinglesmith, D.A., Krueger, V.L., Longanecker, G.W., Moore, J.V., Pyle, A.B., Rebar, F., Sizemore, K.O., Sparks, W., Underhill, A.B., Vitagliano, H.D., West, D.K., Macchetto, F., Fitton, B., Barker, P.J., Dunford, E., Gond­ halekar, P.M., Hall, J .E., Harrison, V.A.W., Oliver, M.B., Sandford, M.C.W., Vaughan, P.A., Ward, A.K., Anderson, B.E., Boksenberg, A., Coleman, C.I., Snijders, M.A.J., Wilson, R.: 1978, Nature 275, 372 Bohlin, R.C., Holm, A.: 1980, IUE NASA Newsletter No. 10, p. 37 Brown, A., Jordan, C.: 1981, Monthly Notices Roy. Astron. Soc. 196, 757 Castro, E., Fernández Figueroa, M.J., Rego, M., Ponz, D.: 1981, Astron. Astrophys. 102, 207 Dupree, A.K., Hartmann, L.: 1980, in Stellar Turbulence, IAU Coll. 51, eds. D. F. Gray and J. L. Linsky, Springer, Berlín, Heidelberg, New York, p. 279 Fernández Figueroa, M.J., Castro, E., Rego, M.: 1982, ESA SP-176, p. 157 Giacconi, R., Branduardi, G., Briel, U., Epstein, A., Frabricant, D., Feigelson, E., Forman, W., Gorenstein, P., Grindlay, J., Gursky, H., Harnden, F.R., Henry, J.P., Jones, C., Kellogg, E., Kock, D., Murray, S., Schreier, E., Seward, F., Tananbaum, H., Topka, K., Van Speybroeck, L., Holt, S.S., Becker, R.H., Boldt, E.A., Serlemitsos, P.J., Clark, G., Cañizares, C., Market, T., Novick, R., Helfand, D., Long, K.: 1979, Astrophys. J. 230, 540 Haisch, B.M., Linsky, J.L.: 1976, Astrophys. J. 205, L 39 Hearnshaw, J.B.: 1974, Astron. Astrophys. 34, 263 Hearnshaw, J.B.: 1975, Astron. Astrophys . 38, 271 Johnson, H.M.: 1981, Astrophys. J. 243, 234 Johnson , H.L., Mitchell, R.I., Iriarte, D.: 1966, Comm. Lunar Planetary Lab. 4, 99 Jordan, C.: 1969, Monthly Notices Roy. Astron. Soc. 142, 501 Jordan, C.: 1980a, Higlights of Astronomy, Reidel, Dordrecht, Vol. 5, p. 533 Jordan, C.: 1980b, Astron. Astrophys. 86, 355 Jordan, C., Wilson , R.: 1971, Physics of the Solar Corona p. 211, ed. C.J. Macris, Reidel, Dordrecht Linsky, J.L., Haisch, B.M.: 1979, Astrophys. J. 229, L 27 Linsky, J.L., Worden, S.P., McClintock, W., Robertson, R.M.: 1979, Astrophys. J. Suppl. 41, 47 Mullan, D.J.: 1976, Astrophys. J. 209, 171 Oinas, V.: 1977, Astron. Astrophys. 61, 17 Raymond, J.C., Smith, B.W.: 1977, Astrophys. J. Suppl. 35, 419 Simon, T., Linsky, J.L., Stencel, R.: 1982, Astrophys. J. 257, 225 Vaiana, G.S., Cassinelli, J.P., Fabbiano, G., Giacconi, R., Golub, L., Gorenstein, P., Haisch, B.M., Harnden, F.R ., Johnson, H.M., Linsky, J.L., Maxson, C.W., Mewe, R., Rosner, R., Seward, F., Topka, K., Zwaan , C.: 1981, Astrophys. J. 245, 163 Wilson, O.C., Bappu, M.K.V.: 1957, Astrophys. J. 125, 661 Zirin, H.: 1976, Astrophys. J. 208, 4140004-6361https://hdl.handle.net/20.500.14352/64990© European Southern Observatory. We would like to thank an anonymous referee for useful comments.Ultraviolet emissions of τCet, δPav, and 61 Cyg A have been analysed to determine the structure of their outer atmospheres. Emission line fluxes are used to find the emission measure distributions. Using two boundary values of the electron pressure, models of the transition region have been derived. In the two models of τCet the net conductive flux is less than the radiation losses at all temperatures. However, for δPav and 61 Cyg A the model with the upper boundary value of the electron pressure has a temperature range where the radiative losses are less than the net conductive fluxes. Measured X-ray fluxes are used to test the coronal temperature values derived from the ultraviolet observations.engEmissions from the transition regions and coronae of three cool dwarf starsjournal articlehttp://adsabs.harvard.edu/abs/1983A%26A...119..243Fhttp://adsabs.harvard.edu/open access52Transition regionCoronaX-ray emissionAstrofísicaAstronomía (Física)