Properties of the P Cygni wind found using the Self Absorption Curve method

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 li...

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Veröffentlicht in:	Astronomy and astrophysics (Berlin) 2002-07, Vol.390 (1), p.213-218
Hauptverfasser:	Muratorio, G., Markova, N., Friedjung, M., Israelian, G.
Format:	Artikel
Sprache:	eng
Schlagworte:	outflows stars: early-type stars: individual: P Cyg stars: winds
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creator	Muratorio, G. Markova, N. Friedjung, M. Israelian, G.
description	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.
doi_str_mv	10.1051/0004-6361:20020708
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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. 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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.</abstract><pub>EDP Sciences</pub><doi>10.1051/0004-6361:20020708</doi><tpages>6</tpages><oa>free_for_read</oa></addata></record>
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source	Bacon EDP Sciences France Licence nationale-ISTEX-PS-Journals-PFISTEX; EDP Sciences; EZB-FREE-00999 freely available EZB journals
subjects	outflows stars: early-type stars: individual: P Cyg stars: winds
title	Properties of the P Cygni wind found using the Self Absorption Curve method
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