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J/other/ApSS/353.347 3980-7100AA Sun spectral atlases (Fathivavsari+, 2014)
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Spectral atlases of the Sun from 3980 to 7100AA at the center and at the
limb.
Fathivavsari H., Ajabshirizadeh A., Koutchmy S.
<Astrophys. Space Sci. 353, 347-355 (2014)>
=2014Ap&SS.353..347F
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ADC_Keywords: Sun ; Spectroscopy ; Atlases
Keywords: atlases - Sun: photosphere
Abstract:
In this work, we present digital and graphical atlases of spectra of
both the solar disk-center and of the limb near the Solar poles using
data taken at the UTS-IAP & RIAAM (the University of Tabriz
Siderostat, telescope and spectrograph jointly developed with the
Institut d'Astrophysique de Paris and Research Institute for Astronomy
and Astrophysics of Maragha). High resolution and high signal-to-noise
ratio (SNR) CCD-slit spectra of the sun for 2 different parts of the
disk, namely for mu=1.0 (solar center) & for mu=0.3 (solar limb)
are provided and discussed. While there are several spectral atlases
of the solar disk-center, this is the first spectral atlas ever
produced for the solar limb at this spectral range. The resolution of
the spectra is about R 70000 (Deltalambda 0.09AA) with the
signal-to-noise ratio (SNR) of 400-600. The full atlas covers the
3980 to 7100AA spectral regions and contains 44 pages with three
partial spectra of the solar spectrum put on each page to make it
compact. The difference spectrum of the normalized each page to make
it compact. The difference spectrum of the normalized solar
disk-center and the solar limb is also included in the graphic
presentation of the atlas to show the difference of line profiles,
including far wings. The identification of most of the significant
solar lines are included in the graphic presentation of the atlas.
Telluric lines are producing a definite signature on the difference
spectra which is easy to notice.
Description:
The "spectrum.pdf" file contains 44 pages of graphic presentation of
the solar disk-center vs. solar limb spectra with the identification
of most of the lines included. Each page contains 3 partial spectra.
The identification of lines is made using the reference atlas of Moore
et al. (1966). Each page contains three spectral windows, with each
window made up of two panels. The upper panel shows the spectrum of
the solar disk-center (black curve) on which the spectrum of the solar
limb is overplotted as red curve while the lower panel illustrates the
difference spectrum of the two. The difference spectrum of the lower
panel clearly indicates that the depth of the absorption lines taken
at the solar disk-center is usually deeper than those taken at the
solar limb (in this panel the two pink dashed lines indicate the
residual intensity of 0.05 above and below zero). Note that, in the
solar limb spectrum, the level of the continuum was put to the
reference level given in the "Astrophysical Quantities, 3rd Edition by
C. W. Allen, p. 169".