Modified methods of stellar magnetic field measurements

Standard

Modified methods of stellar magnetic field measurements. / Kholtygin, A. F.

In: Astronomische Nachrichten, Vol. 335, No. 10, 2014.

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BibTeX

@article{c93a239e912845bfb63762de6efd7b5e,

title = "Modified methods of stellar magnetic field measurements",

abstract = "The standard methods of the magnetic field measurement, based on an analysis of the relation between the Stokes $V$-parameter and the first derivative of the total line profile intensity, were modified by applying a linear integral operator $\hat{L}$ to the both sides of this relation.As the operator $\hat{L}$, the operator of the wavelet transform with DOG-wavelets is used. The key advantage of the proposed method is an effective suppression of the noise contribution into the line profile and the Stokes parameter $V$. The efficiency of the method has been studied using the model line profiles with various noise contributions. To test the proposed method, the spectropolarimetric observations of the A0 star $\alpha^2\,$~CVn, Of?p star HD~148937 and A0 supergiant HD~92207 were used. The longitudinal magnetic field strengths calculated by our method appeared to be in a good agreement with those determined by other methods.",

keywords = "stars: magnetic fields -- methods: analytical",

author = "Kholtygin, {A. F.}",

year = "2014",

doi = "10.1002/asna.201212123",

language = "English",

volume = "335",

journal = "Astronomische Nachrichten",

issn = "0004-6337",

publisher = "Wiley-Blackwell",

number = "10",

}

RIS

TY - JOUR

T1 - Modified methods of stellar magnetic field measurements

AU - Kholtygin, A. F.

PY - 2014

Y1 - 2014

N2 - The standard methods of the magnetic field measurement, based on an analysis of the relation between the Stokes $V$-parameter and the first derivative of the total line profile intensity, were modified by applying a linear integral operator $\hat{L}$ to the both sides of this relation.As the operator $\hat{L}$, the operator of the wavelet transform with DOG-wavelets is used. The key advantage of the proposed method is an effective suppression of the noise contribution into the line profile and the Stokes parameter $V$. The efficiency of the method has been studied using the model line profiles with various noise contributions. To test the proposed method, the spectropolarimetric observations of the A0 star $\alpha^2\,$~CVn, Of?p star HD~148937 and A0 supergiant HD~92207 were used. The longitudinal magnetic field strengths calculated by our method appeared to be in a good agreement with those determined by other methods.

AB - The standard methods of the magnetic field measurement, based on an analysis of the relation between the Stokes $V$-parameter and the first derivative of the total line profile intensity, were modified by applying a linear integral operator $\hat{L}$ to the both sides of this relation.As the operator $\hat{L}$, the operator of the wavelet transform with DOG-wavelets is used. The key advantage of the proposed method is an effective suppression of the noise contribution into the line profile and the Stokes parameter $V$. The efficiency of the method has been studied using the model line profiles with various noise contributions. To test the proposed method, the spectropolarimetric observations of the A0 star $\alpha^2\,$~CVn, Of?p star HD~148937 and A0 supergiant HD~92207 were used. The longitudinal magnetic field strengths calculated by our method appeared to be in a good agreement with those determined by other methods.

KW - stars: magnetic fields -- methods: analytical

U2 - 10.1002/asna.201212123

DO - 10.1002/asna.201212123

M3 - Article

VL - 335

JO - Astronomische Nachrichten

JF - Astronomische Nachrichten

SN - 0004-6337

IS - 10

ER -

ID: 7028553