Some effects of finite spectral resolution on the Stokes V profile

Details Some effects of finite spectral resolution on the Stokes V profile Some effects of finite spectral resolution on the Stokes V profile

Dec 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986a%26a...170..120s&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 170, no. 1, Dec. 1986, p. 120-125.

Astronomy and Astrophysics

Astrophysics

32

Circular Polarization, Magnetic Flux, Solar Spectra, Spectral Resolution, Fourier Transformation, Solar Magnetic Field, Spectrometers

Scientific paper

The authors consider some general effects of spectral smearing on the Stokes V profile of the Fe I 5250.2 Å line, as observed on the sun with a Fourier transform spectrometer at a very high spectral resolution. The effects of low spectral resolution are numerically simulated by convoluting the observed line profiles with model instrumental profiles. The authors also try to find some Stokes V parameters which are insensitive to the spectral resolution. Finally, they show that the large Stokes V zero-crossing wavelength shifts observed by Wiehr (1985) and by Scholier and Wiehr (1985) from complete profiles, and by Giovanelli and Slaughter (1978) with the line-centre-magnetogram technique of Giovanelli and Ramsey (1971) are compatible with the results of Stenflo and Harvey (1985) and Solanki (1985, 1986).

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