The effects of Alfven waves and radiation pressure in dust winds of late-type stars

D Falceta-Goncalves*, V Jatenco-Pereira

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

30 Citations (Scopus)

Abstract

In the present study, we analyze the effects of a flux of Alfven waves acting together with radiation pressure on grains as an acceleration mechanism of the wind of late-type stars. In the wind model, we simulate the presence of grains through a strong damping of the waves, and we use a nonisothermal pro le for the temperature that is coherent with grain formation theories. We examine the changes in the velocity pro le of the wind, and we show that if the grains are created in the region 1.1 <r/r(0) <2.0, their presence will affect the mass loss and terminal velocity. The model is applied to a K5 supergiant star and to Betelgeuse (alpha Ori).

Original languageEnglish
Pages (from-to)976-981
Number of pages6
JournalAstrophysical Journal
Volume576
Issue number2
Publication statusPublished - 10 Sept 2002

Keywords

  • MHD
  • shock waves
  • stars : late-type
  • stars : mass loss
  • CORONAE-BOREALIS STARS
  • DRIVEN SOLAR-WIND
  • WOLF-RAYET STARS
  • MASS-LOSS RATES
  • STELLAR WINDS
  • CIRCUMSTELLAR ENVELOPES
  • EVOLVED STARS
  • ALPHA-ORIONIS
  • CARBON STARS
  • COOL STARS

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