Hostname: page-component-cd9895bd7-dzt6s Total loading time: 0 Render date: 2024-12-25T15:36:29.616Z Has data issue: false hasContentIssue false
  • English
  • Français

The Determination of Stellar Turbulence by Low Resolution Techniques

Published online by Cambridge University Press:  12 April 2016

R. Głębocki  and
A. Stawikowski
R. Głębocki
Affiliation:
Institute of Physics, Gdańsk University, 80-952 Gdańsk, Poland
A. Stawikowski
Affiliation:
Institute of Physics, Gdańsk University, 80-952 Gdańsk, Poland

Extract

Core share and HTML view are not available for this content. However, as you have access to this content, a full PDF is available via the ‘Save PDF’ action button.

In this review the problem of measuring velocity field in stellar atmospheres from the observer’s point of view is presented. Our purpose here is to discuss observational methods in which detailed analysis of line profiles is not necessary, i.e. methods based on measurements of total absorption of lines (curve of growth and narrowband photometry), methods based on measurements of widths of lines (Goldberg-Unno method and curve of line width correlation) and measurements of differential line shifts. Therefore, our review will be limited to the discussion of basic assumptions of each method, to the analysis of their advantages and disadvantages, to a specification of a quantity which can be derived from a given method and finally to a brief presentation of the results. Usually, the low resolution methods provide an information about a particular component of the stellar velocity field. But the problem is more complicated as we do not know if particular components can be isolated from the stellar velocity field, thus, we do not know the real physical meaning of the measurable parameters. In this paper we shall adopt classical concept of micro- and macro-turbulence and convective type velocity. This simplified picture was criticized since 15 years on every colloquium devoted to hydrodynamic phenomena in the stellar atmospheres, but until now the theoreticians have not succeded in developing a theory which would satisfactorily interpret the observations.

Type
2. Observed Properties of Stellar Turbulence
Information
International Astronomical Union Colloquium , Volume 51: Stellar Turbulence , 1980 , pp. 55 - 74
Copyright
Copyright © Springer-Verlag 1980

References

Andersen, P.H. 1973. Publ. Astron. Soc. Pacific, 85, 666 CrossRefGoogle Scholar
Athay, R.G. 1972, Radiation Transport in Spectral Lines, D. Reidel Publishing Comp., Dordrecht CrossRefGoogle Scholar
Ayers, T.R. 1977, Ap.J., 214, 905 Google Scholar
Beckers, J.M. and Nelson, G.D. 1978, Solar Phys., 58, 243 CrossRefGoogle Scholar
Bell, B. 1951 Harvard Univ. Special Rep., No.35Google Scholar
Bell, R.A. and Gustafsson, B. 1978, Astron. & Astroph.Suppl.in pressGoogle Scholar
Bell, R.A. and Rodgers, R.W. 1964 M.N.R.A.S., 128, 365 Google Scholar
Bell, R.A. and Rodgers, R.W. 1965, M.N.R.A.S., 129, 127 Google Scholar
Bely, F. 1966, in Abundance Determination in Stellar Spectra, IAU Symp. No.26, ed. Hubenet, H., Academic Press, p.254 Google Scholar
Blackwell, D.E. and Shallis, M.J. 1979. M.N.R.A.S., 186, 673 CrossRefGoogle Scholar
Böhm-Vitense, E. 1972, Astron. & Astroph., 16, 81 Google Scholar
Bonnell, J. and Branch, D. 1979. Ap.J., 229, 175.Google Scholar
Canfield, R.C. and Mehltretter, J.P. 1973, Solar Phys., 33, 33 Google Scholar
Chaffee, F.H. Jr., 1970, Astron. & Astroph., 4, 291 Google Scholar
Corliss, C.H. and Warner, B. 1964, Ap.J.Suppl., 8, 395 Google Scholar
Dravins, D. 1974, Astron. & Astroph., 36, 143 Google Scholar
Dumont, S., Heidmann, N., Jefferies, J.T. and Pecker, J.-C. 1975. Astron. & Astroph., 40, 127 Google Scholar
Elste, G.H.E. and Ionson, J. 1971, Bull. Am. Astr. Soc., 3, 380 Google Scholar
Evans, J.C. and Elste, G.H.E. 1971, Astron. & Astroph., 12, 428 Google Scholar
Evans, J.C.,Ramsey, L.W. and Testerman, L. 1975, Astron.& Astroph.,42,237 Google Scholar
Foy, R. 1972, Astron. & Astroph., 18, 26 Google Scholar
Foy, R. 1978, Astron. & Astroph., 67, 311 Google Scholar
Garz, T. and Kock, M. 1969, Astron.& Astroph., 2, 274 Google Scholar
Głębocki, R. 1972, Acta Astron., 22, 141 Google Scholar
Głębocki, R. 1973, Acta Astron., 23, 135 Google Scholar
Głębocki, R. and Stawikowski, A. 1969, Acta Astron., 19, 87 Google Scholar
Głębocki, R. and Stawikowski, A. 1971, Acta Astron., 21, 185 Google Scholar
Goldberg, L. 1958, Ap.J., 127, 308 Google Scholar
Gray, D.F. 1978, Solar Phys., 9, 193 Google Scholar
Griffin, R. and , R. 1973, M.N.R.A.S., 162, 255 Google Scholar
Gustafsson, B., and Bell, R.A. 1979 Astron. & Astroph., in pressGoogle Scholar
Gustafsson, B., Kjaegaard, P. and Andersen, S. 1974, Astron.& Astroph.,34, 99 Google Scholar
Hasegawa, T. 1978, Journal of Hokkaido Univ. of Education, 28, 61 Google Scholar
Havnes, O. and Moe, O.K. 1975, Astron. & Astroph., 42, 269 Google Scholar
Hensberge, H.and De Loore, C. 1974, Astron. & Astroph., 37, 367 Google Scholar
Heuvel, , van den, E.R.J. 1963, Bull.Astr.Inst.Neth., 17, 148 Google Scholar
Lambert, D.L. and Mallia, E.A. 1968, Solar Phys., 3, 499 Google Scholar
Landi Degl’Innocenti, E. 1975, Astron. & Astroph., 45, 269 Google Scholar
Mihalas, D. 1973, Ap.J., 179, 209 Google Scholar
Nissen, P.E. and Gustafsson, B. 1978, in Astronomical Papers dedicated to Bengt Stromgren, eds. Reiz, A. and Andersen, T., Copenhagen Univ.Obs., p.43 Google Scholar
Osmer, P.S. 1972, Ap.J.Suppl., 24, 255 Google Scholar
Schatzman, E. and Magnan, C. 19737 Astron. & Astroph., 38, 373 Google Scholar
Sikorski, J. 1976, Acta Astron., 26, 1 Google Scholar
Slettebak, A. 1956, Ap.J., 124, 173 Google Scholar
Smith, M.A. 1973, Ap.J., 182, 159 Google Scholar
Smith, M.A. 1974, Ap.J., 192, 623 Google Scholar
Stawikowski, A. 1976, thesis, Toruń Univ. Google Scholar
Stencel, R.E. 1977, Ap.J., 215, 176 Google Scholar
Stenholm, L.G. 1977, Astron. & Astroph., 61, 155 Google Scholar
Unno, W. 1959a, Ap.J., 129, 375 Google Scholar
Unno, W. 1959b, Ap.J., 129, 388 Google Scholar
Van Paradijs, J. 1973, Astron. & Astroph., 23, 369 Google Scholar
Warner, B. 1964, M.N.R.A.S., 127, 413 Google Scholar
Wright, K.O. 1951. Publ. Dom. Astroph. Obs., 8, 1 Google Scholar
Wright, K.O. 1966, in Abundance Determinations in Stellar Spectra, IAU Symp. No.26, ed. Hubenet, H., Academic Press, p.15 Google Scholar
Zaremba, D. 1979 Acta Astron., in pressGoogle Scholar
Zeinalov, S.K. 1970, Izv. Crimean Astroph. Obs., 41, 298 Google Scholar