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NLTE analysis of massive ob stars in open clusters (1990)

Herrero, A. ; Kudritzki, R. P. ; Vilchez, J. M.

Springer

Astrophysics and space science 169 (1990), S. 7-13

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ISSN: 1572-946X

Source: Springer Online Journal Archives 1860-2000

Topics: Physics

Notes: Abstract We present a new method for deriving stellar masses and distances using the theory of radiatively driven winds as presented by Kudritzkiet al. (1989) and the stellar parameters derived from NLTE spectroscopic analysis. We illustrate the procedure with five stars observed in three open clusters and show that the method can be advantageous against the more usual of using the expression for the gravity. The comparison with evolutionary tracks indicates a possible discrepancy between the masses and helium abundances (when enhanced) derived from these tracks and those obtained by the other methods.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1007/BF00640677

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