Observations of Stellar Wind Instabilities and Variability on Small and Large Scales

Details Observations of Stellar Wind Instabilities and Variability on Small and Large Scales Observations of Stellar Wind Instabilities and Variability on Small and Large Scales

Oct 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998ap%26ss.260..101l&link_type=abstract

Astrophysics and Space Science, v. 260, Issue 1/2, p. 101-112 (1998).

Astronomy and Astrophysics

Astrophysics

1

Scientific paper

I review various observations which suggest that the winds of hot stars are inhomogeneous because of instabilities in the wind flow. On large scales, local wind overdensities are indirectly detected in the form of excess in the infra-red (IR) and radio free-free continuum. The X-ray detection of a hot (T ˜ 106) wind component suggests that the wind is pervaded with strong shocks. The small-scale density structure of the wind can be studied from observations of Line-Profile Variations (LPVs) in optical and UV spectral lines, which are formed close to the stellar surface.

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