Conference proceeding
The Zeeman Effect in Hot-Star Winds with a Split Monopole Magnetic Field
RECENT DIRECTIONS IN ASTROPHYSICAL QUANTITATIVE SPECTROSCOPY AND RADIATION HYDRODYNAMICS, Vol.1171, pp.187-198
AIP Conference Proceedings
01/01/2009
DOI: 10.1063/1.3250059
Abstract
We calculate the circularly polarized Stokes V(lambda) profile for emission lines, formed in hot-star winds threaded with a weak split monopole magnetic field. Invoking the weak-field approximation, we find that the V(lambda) profile has a characteristic shape with the ubiquitous sign reversal across line center, but also with a sign reveral in each wing. For the optically thin lines treated here, we also conclude that the V(lambda) profile integrates to zero on each side of the line separately. The overall scale of V(lambda)/I(lambda) is set by the ratio of the field strength to the flow speed, B/v, characteristic of the line-forming region, and is of the order of 0.1% for a wind magnetic field B congruent to 100 G at depths where the windspeed is v congruent to 100 km s(-1).
Details
- Title: Subtitle
- The Zeeman Effect in Hot-Star Winds with a Split Monopole Magnetic Field
- Creators
- K. G. Gayley - University of IowaR. Ignace - East Tennessee State University
- Contributors
- I Hubeny (Editor)J M Stone (Editor)K MacGregor (Editor)K Werner (Editor)
- Resource Type
- Conference proceeding
- Publication Details
- RECENT DIRECTIONS IN ASTROPHYSICAL QUANTITATIVE SPECTROSCOPY AND RADIATION HYDRODYNAMICS, Vol.1171, pp.187-198
- Publisher
- Amer Inst Physics
- Series
- AIP Conference Proceedings
- DOI
- 10.1063/1.3250059
- ISSN
- 0094-243X
- eISSN
- 1551-7616
- Number of pages
- 3
- Grant note
- AST-0807664 / NSF; National Science Foundation (NSF)
- Language
- English
- Date published
- 01/01/2009
- Academic Unit
- Physics and Astronomy
- Record Identifier
- 9984429023702771
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