Multiline transfer and the dynamics of stellar winds

A Monte Carlo technique for treating multiline transfer in stellar winds is described and tested. With a line list containing many thousands of transitions and with fairly realistic treatments of ionization, excitation, and line formation, the resulting code allows the dynamical effects of overlappi...

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Vydané v:The Astrophysical journal Ročník 288; číslo 2; s. 679 - 693
Hlavní autori: Abbott, D. C., Lucy, L. B.
Médium: Journal Article
Jazyk:English
Vydavateľské údaje: Chicago, IL University of Chicago Press 01.01.1985
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ISSN:0004-637X, 1538-4357
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Abstract A Monte Carlo technique for treating multiline transfer in stellar winds is described and tested. With a line list containing many thousands of transitions and with fairly realistic treatments of ionization, excitation, and line formation, the resulting code allows the dynamical effects of overlapping lines to be investigated quantitatively, as well as providing the means of directly synthesizing the complete spectrum of a star and its wind. As a direct result of this improved treatment of multiline transfer, the computed mass loss rate for Zeta Puppis is now found to agree with the observed rate. The synthesized spectrum of Zeta Puppis also agrees with observational data. These results confirm that line driving is the dominant acceleration mechanism in this star's wind.
AbstractList A Monte Carlo technique for treating multiline transfer in stellar winds is described and tested. With a line list containing many thousands of transitions and with fairly realistic treatments of ionization, excitation, and line formation, the resulting code allows the dynamical effects of overlapping lines to be investigated quantitatively, as well as providing the means of directly synthesizing the complete spectrum of a star and its wind. As a direct result of this improved treatment of multiline transfer, the computed mass loss rate for Zeta Puppis is now found to agree with the observed rate. The synthesized spectrum of Zeta Puppis also agrees with observational data. These results confirm that line driving is the dominant acceleration mechanism in this star's wind.
Author Abbott, D. C.
Lucy, L. B.
Author_xml – sequence: 1
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  surname: Abbott
  fullname: Abbott, D. C.
– sequence: 2
  givenname: L. B.
  surname: Lucy
  fullname: Lucy, L. B.
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Keywords First type star
Mass loss
Radiative transfer
Stellar wind
Dynamics
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Snippet A Monte Carlo technique for treating multiline transfer in stellar winds is described and tested. With a line list containing many thousands of transitions and...
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SubjectTerms Astronomy
Earth, ocean, space
Exact sciences and technology
Mass loss and stellar winds
Stars
Stellar characteristics and properties
Title Multiline transfer and the dynamics of stellar winds
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