Determination of microturbulent velocities in early-type stars

Details Determination of microturbulent velocities in early-type stars Determination of microturbulent velocities in early-type stars

Apr 1981

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981a%26a....97...10d&link_type=abstract

Astronomy and Astrophysics, vol. 97, no. 1, Apr. 1981, p. 10-15.

Computer Science

Numerical Analysis

13

Atmospheric Turbulence, B Stars, Early Stars, Error Analysis, Spectral Line Width, Stellar Atmospheres, Flow Velocity, Numerical Analysis, Random Errors, Supergiant Stars, Thermodynamic Equilibrium

Scientific paper

In the case of B-type stars, microturbulent velocities are often derived from the requirement that abundances estimated from individual lines show no systematic variation with line strength. It is demonstrated that this method results in an overestimate of the microturbulent velocity. For high-quality equivalent widths, the systematic error is found to be approximately 2 km/sec; for less accurate observational data, the error is larger.

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