SIMULTANEOUS MAGNETIC FIELD MEASUREMENTS IN SUNSPOTS USING SPECTRAL LINES WITH DIFFERENT LANDE FACTORS
Journal Title: Odessa Astronomical Publications - Year 2015, Vol 28, Issue 2
Abstract
We present magnetic field measurements in several sunspots observed in June-July 2015 on Horizontal Solar Telescope ATsU-5 of Main Astronomical Observatory of National Academy of Sciences of Ukraine. The Zeeman splittings were measured using I ± V profiles of about ten spectral lines of Mn I, Fe I and Ni I including three lines with negative Lande factors, namely Fe I 5434.527 Å, Fe I 6094.419 Å and Fe I 4995.411 Å ( geff = – 0.014, – 0.218, and – 0.25, respectively). Our main conclusions are the following: a) as rule, spectral lines with largest Lande factors give the strongest measured magnetic fields Bobs in sunspot umbra that can be interpreted as a result of blending the Zeeman π- and σ-components in case of non-longitudinal magnetic field. b) in some places of sunspots, Bobs differs also for lines with close Lande factors, e.g. by Fe I 5432.950 and Ni I 5435.871 (geff = 0.67 and 0.5, respectively). c) lines Fe I 6094.419 Å and Fe I 4995.411 Å with geff < 0 have in sunspots signs of splitting which corresponds to geff > 0. The possible causes of named effects are discussed in short form.
Authors and Affiliations
S. N. Osipov, V. G. Lozitsky
Keywords
Related Articles
- EP ID EP603177
- DOI -
- Views 73
- Downloads 0
THE PHYSICAL CONDITIONS OF THE CENTRAL PART OF ORION A HII REGION BY THE RADIO RECOMBINATION LINES AT 8 AND 13 MM
Observations of recombination radio lines (RRL) of hydrogen, helium (H, He) and carbon (C) were carried out in several positions of the HII region Orion A with RT22 radio telescope (Pushchino, Russia) at the wavelengths...
THE SCIENTIFIC USE OF THE UKRVO JOINT DIGITAL ARCHIVE: GRBs FIELDS, PLUTO, AND SATELLITES OF OUTER PLANETS
In the framework of UkrVO national project the new methods of plate digital image processing are developed. The photographic material of the UkrVO Joint Digital Archive (JDA – http://gua.db.ukr-vo.org/vo-mao/DB/archive...
ANALYSIS OF SELF – GRAVITATING PLANETARY SATELLITES IN THE SOLAR SYSTEM
As of today there have been more than 180 planetary satellites discovered in the Solar system, and the number of outer moons found continues to grow. Most of those natural satellites have insufficient mass and are able t...
ISENTROPIC "SHOCK WAVES" IN NUMERICAL ASTROPHYSICS
Numerical simulations of the cold supersonic flows in different astrophysical problems meets with the loss of precision difficulty. For to overcome the difficulty it was suggested earlier to use conservation entropy equa...
A SURVEY OF SEVERAL SPECTRAL LINES IN THE SPECTRA OF THE SUPERGIANT HD 14143
Variations in the Ha, Hb, HeI, CII, SiIII, Al III, FeIII, NII, and OII lines in the spectrum of the star HD 14143 are investigated using observations carried out in 2013 with the 2-m telescope at the Shamakhy Astrophysic...