42 citations · 175 across the 9 of their papers we have counts for
9 papers
Reconstructing solar magnetic fields from historical observations VIII. AIA 1600 Å contrast as a proxy of solar magnetic fields
Ismo Tähtinen, Ilpo Virtanen, Alexei A. Pevtsov +1
The bright regions in the solar chromosphere and temperature minimum have a good spatial correspondence with regions of intense photospheric magnetic field. Their observation start…
On a limitation of Zeeman polarimetry and imperfect instrumentation in representing solar magnetic fields with weaker polarization signal
Alexei A. Pevtsov, Yang Liu, Ilpo Virtanen +4
Full disk vector magnetic fields are used widely for developing better understanding of large-scale structure, morphology, and patterns of the solar magnetic field. The data are al…
A new signal of the solar magnetic cycle: Opposite shifts of weak magnetic field distributions in the two hemispheres
Tibebu Getachew, Ilpo Virtanen, Kalevi Mursula
We study the asymmetric distribution of weak photospheric magnetic field values in the two hemispheres separately using synoptic maps from SDO/HMI, SOLIS/VSM and WSO during solar c…
Reconstructing solar magnetic fields from historical observations V. Sunspot magnetic field measurements at Mount Wilson Observatory
Alexei A. Pevtsov, Kseniya A. Tlatova, Alexander A. Pevtsov +7
Context. Systematic observations of magnetic field strength and polarity in sunspots began at Mount Wilson Observatory (MWO), USA in early 1917. Except for a few brief interruption…
Asymmetric distribution of weak photospheric magnetic field values
Tibebu Getachew, Ilpo Virtanen, Kalevi Mursula
We use the synoptic maps of the photospheric magnetic field observed at Wilcox Solar Observatory, Mount Wilson Observatory, Kitt Peak, SOHO/MDI, SOLIS/VSM, and SDO/HMI to study the…
Structure and evolution of the photospheric magnetic field in 2010 - 2017: comparison of SOLIS/VSM vector field and potential field
Ilpo I. Virtanen, Alexei A. Pevtsov, Kalevi Mursula
The line-of-sight (LOS) component of the large-scale photospheric magnetic field has been observed since the 1950s, but the daily full-disk observations of the full vector magnetic…