Development of high-resolution spectropolarimetry has stimulated a major progress in our understa... more Development of high-resolution spectropolarimetry has stimulated a major progress in our understanding of the magnetism and activity of late-type stars. During the last decade magnetic fields were discovered and mapped for various types of active stars using spectropolarimetric methods. However, these observations and modeling attempts are inherently incomplete since they are based on the interpretation of the stellar circular polarization alone. Taking advantage of the recently commissioned HARPS polarimeter, we obtained the first systematic observations of cool active stars in all four Stokes parameters. Here we report detection of the magnetically induced linear polarization in the RS CVn binary HR 1099 and phase-resolved full Stokes vector observations of varepsilon Eri. For the latter star we measured the field strength with the precision of ˜0.1 G over a complete rotation cycle and reconstructed the global field topology with the help of magnetic Doppler imaging. Our observati...
The current software was developed at the Taurida National University, astronomy department of ph... more The current software was developed at the Taurida National University, astronomy department of physics faculty by Lyashko D.A., Tsymbal V.V. This programm comlex can be adapted according namely to individual spectrograph. All spectra processing goes automatically, so in this way it becomes possible to minimize user interaction with programm. It is very convinient and does not require special training for using it. In this case we can exclude human element and so then, output data corruption. The algotithm of processing due to differences between spectrographs is described in this paper.
Development of high-resolution spectropolarimetry has stimulated a major progress in our understa... more Development of high-resolution spectropolarimetry has stimulated a major progress in our understanding of the magnetism and activity of late-type stars. During the last decade magnetic fields were discovered and mapped for various types of active stars using spectropolarimetric methods. However, these observations and modeling attempts are inherently incomplete since they are based on the interpretation of the stellar circular polarization alone. Taking advantage of the recently commissioned HARPS polarimeter, we obtained the first systematic observations of cool active stars in all four Stokes parameters. Here we report detection of the magnetically induced linear polarization in the RS CVn binary HR 1099 and phase-resolved full Stokes vector observations of varepsilon Eri. For the latter star we measured the field strength with the precision of ˜0.1 G over a complete rotation cycle and reconstructed the global field topology with the help of magnetic Doppler imaging. Our observati...
The current software was developed at the Taurida National University, astronomy department of ph... more The current software was developed at the Taurida National University, astronomy department of physics faculty by Lyashko D.A., Tsymbal V.V. This programm comlex can be adapted according namely to individual spectrograph. All spectra processing goes automatically, so in this way it becomes possible to minimize user interaction with programm. It is very convinient and does not require special training for using it. In this case we can exclude human element and so then, output data corruption. The algotithm of processing due to differences between spectrographs is described in this paper.
Uploads