A Simple Mean-Field Diagnostic from Stokes V Spectra

K Gayley; S Owocki; Georges Meynet; Cyril Georgy; José Groh; Philippe Stee

doi:10.1017/S1743921314007145

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A Simple Mean-Field Diagnostic from Stokes V Spectra

Journal article

Open access

Peer reviewed

A Simple Mean-Field Diagnostic from Stokes V Spectra

K Gayley, S Owocki, Georges Meynet, Cyril Georgy, José Groh and Philippe Stee

Proceedings of the International Astronomical Union, Vol.9(S307), pp.375-376

06/01/2014

DOI: 10.1017/S1743921314007145

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Abstract

Abstract It is shown that the diagnostics from an observed circularly polarized line in a rapidly rotating star are directly interpretable, not in terms of the observed Stokes V profiles, but in terms of its antiderivative with respect to wavelength (in velocity units if preferred). This also leads to a new mean-field diagnostic that is just as easily obtained as the standard "center of gravity" approach, and is less susceptible to cancellation if the line-of-sight field changes sign over the face of the star.

Astrophysics

Magnetic fields

Stars & galaxies

Details

Title: Subtitle: A Simple Mean-Field Diagnostic from Stokes V Spectra
Creators: K Gayley - University of Iowa
S Owocki - University of Delaware
Georges Meynet
Cyril Georgy
José Groh
Philippe Stee
Resource Type: Journal article
Publication Details: Proceedings of the International Astronomical Union, Vol.9(S307), pp.375-376
Publisher: Cambridge University Press
DOI: 10.1017/S1743921314007145
eISBN: 9781107078581; 110707858X
ISSN: 1743-9213
eISSN: 1743-9221
Language: English
Date published: 06/01/2014
Academic Unit: Physics and Astronomy
Record Identifier: 9984428796002771

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