Properties of the PCygni wind found using the Self Absorption Curve method

Details Properties of the PCygni wind found using the Self Absorption Curve method Properties of the PCygni wind found using the Self Absorption Curve method

2002-06-10

arxiv.org/abs/astro-ph/0206139v1

Astronomy and Astrophysics

Astrophysics

accepted by Astronomy & Astrophysics

Scientific paper

10.1051/0004-6361:20020708

We have used the optical lines of N II and Fe III to study the wind of the luminous blue variable P Cyg. This was performed by applying a version of the Self Absorption Curve (SAC) method, involving few assumptions, to lines whose flux can be measured. A rather surprising result was obtained; the lines of more excited multiplets without blue shifted absorption components appear to be optically thick, while the lines of the most excited multiplets may show some indications of being optically thicker than the lines of less excited ones. Explanations of such effects are discussed, including possible inhomogeneities in the wind.

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