Zobrazeno 1 - 10
of 23
pro vyhledávání: '"N. G. Shchukina"'
Autor:
N. G. Shchukina, R. I. Kostyk
Publikováno v:
Kinematika i fizika nebesnyh tel (Online). 36:3-23
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::cb05e21fbdf81dccc01d14f2e5063b4e
https://doi.org/10.15407/kfnt2020.01.003
https://doi.org/10.15407/kfnt2020.01.003
Autor:
R. I. Kostyk, N. G. Shchukina
Publikováno v:
Kinematics and Physics of Celestial Bodies. 36:1-11
The validity of the lambda-meter method for determining the quiet Sun velocity field using the Si I 1082.7 nm line is investigated. To this end, the intensity profiles of this line were calculated for the solar disk center by means of NLTE simulation
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::bc9bb37a17ffceac105d4b2a73b980a3
https://doi.org/10.3103/s0884591320010055
https://doi.org/10.3103/s0884591320010055
Publikováno v:
Kinematics and Physics of Celestial Bodies. 34:277-289
The classical method for determining the magnetic field strength from the distance between the peaks of blue and red wings of the Stokes V profile of a magnetically sensitive spectral line is modified. To reduce the influence of noise and to more acc
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e2f23cdabbe76c39f5da9bc22a0e14c7
https://doi.org/10.3103/s0884591318060041
https://doi.org/10.3103/s0884591318060041
Autor:
J. Trujillo Bueno, N. G. Shchukina
Publikováno v:
Astronomy & Astrophysics
Aims. We aim to investigate the validity of the weak field approximation (WFA) for determining magnetic fields in quiet regions of the solar photosphere using the polarization caused by the Zeeman effect in the Si I10 827 Å line.Methods. We solved t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7229a5cdddd080c08394e99f6b8a6eb3
Publikováno v:
Astronomy Letters. 40:222-229
We analyze the oscillations of the Hα profile width based on our observations of the chromosphere at the base of solar coronal holes. The maximum oscillation amplitude averaged over ten time series is 64 m 0 A. Direct calculations show that this val
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d0ad86f352ea946bfec1efa00a76cb4d
https://doi.org/10.1134/s1063773714030104
https://doi.org/10.1134/s1063773714030104
Publikováno v:
Kinematics and Physics of Celestial Bodies. 30:40-45
From results of spectral (in Ba II λ 455.4-nm line) and spectropolarimetric (in Fe I λλ 1564.3–1565.8-nm lines) observations of the active region (an isolated faculae at the solar disk center) with the German vacuum tower telescope (VTT) at the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::49433041235b6e6d38fba7999af89084
https://doi.org/10.3103/s0884591314010048
https://doi.org/10.3103/s0884591314010048
Autor:
N. G. Shchukina, I. E. Vasil’eva
Publikováno v:
Kinematics and Physics of Celestial Bodies. 29:53-65
We review available published data on the oscillator strengths determined for ionized iron Fe II lines. Particular attention is given to the lines in the ultraviolet spectrum. The oscillator strengths are calculated for 33 Fe II lines observed in the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a8ce846e50a51f93c7e0f722f22db742
https://doi.org/10.3103/s0884591313020074
https://doi.org/10.3103/s0884591313020074
Autor:
A. V. Sukhorukov, N. G. Shchukina
Publikováno v:
Kinematics and Physics of Celestial Bodies. 28:169-182
NLTE formation of the silicon spectrum is studied in three one-dimensional semiempirical models of the solar atmosphere: HOLMUL, MACKKL, and VAL,C. The NLTE silicon abundance calculated from 65 Si I lines of different strengths is almost independent
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::adff7086805ecd5b00ef25bc04bfc35b
https://doi.org/10.3103/s0884591312040071
https://doi.org/10.3103/s0884591312040071
Autor:
A. V. Sukhorukov, N. G. Shchukina
Publikováno v:
Kinematics and Physics of Celestial Bodies. 28:49-61
We determine LTE abundance of silicon from 65 lines of Si I using one-dimensional semiempirical models of the solar atmosphere HOLMUL, MACKKL, and VAL,C. Our list of lines is considerably larger than lists used earlier. We confirm the reliability of
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::48a01b7d8ff2326f7120894d6b475ad6
https://doi.org/10.3103/s0884591312020055
https://doi.org/10.3103/s0884591312020055
Autor:
A. V. Sukhorukov, N. G. Shchukina
Publikováno v:
Kinematics and Physics of Celestial Bodies. 28:27-34
We review published papers dealing with the formation of the silicon solar spectrum and its application for the diagnostics of the solar atmosphere. We pay particular attention to studies on determination of the solar abundance of silicon, its reliab
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::961d83f1016409835d3bcd50a2a67025
https://doi.org/10.3103/s0884591312010084
https://doi.org/10.3103/s0884591312010084