@InProceedings{PalaciosBalmViei:2015:MaFiCo,
               author = "Palacios, Judith and Balmaceda, Laura Antonia and Vieira, Luis 
                         Eduardo Antunes",
          affiliation = "{Universidad de Alcal{\'a}} and {Instituto Nacional de Pesquisas 
                         Espaciais (INPE)} and {Instituto Nacional de Pesquisas Espaciais 
                         (INPE)}",
                title = "Magnetic field configuration in a flaring active region",
            booktitle = "Proceedings...",
                 year = "2015",
                pages = "97--101",
         organization = "International Astronomical Union Symposium (IAU)",
            publisher = "Cambridge University Press",
             keywords = "flares, magnetic fields, Sun: photosphere, techniques: 
                         polarimetric.",
             abstract = "The Helioseismic and Magnetic Imager (HMI) on board the Solar 
                         Dynamics Observatory (SDO) provides continuous monitoring of the 
                         Sun's vector magnetic field through full-disk photospheric data 
                         with both high cadence and high spatial resolution. Here we 
                         investigate the evolution of AR 11249 from March 6 to March 7, 
                         2012. We make use of HMI Stokes imaging, SDO/SHARPs, the HMI 
                         magnetic field line-of-sight (LOS) maps and the transverse 
                         components of the magnetic field as well as LOS velocity maps in 
                         order to detect regions with significant flux emergence and/or 
                         cancellation. In addition, we apply the Local Correlation Tracking 
                         (LCT) technique to the total and signed magnetic flux data and 
                         derive maps of horizontal velocity. From this analysis, we were 
                         able to pinpoint localized shear regions (and a shear channel) 
                         where penumbrae and pore formation areas, with strong linear 
                         polarization signals, are stretched and squeezed, showing also 
                         important downflows and upflows. We have also utilized Hinode/SP 
                         data and compared them to the HMI-SHARPs and the HMI-Stokes 
                         spectrograms. The aforementioned shear channel seems to correspond 
                         well with the X-class flare main channel of March 7 2012, as 
                         observed in AIA/SDO 171, 304 and 1600 Å.",
                  doi = "10.1017/S1743921315004585",
                  url = "http://dx.doi.org/10.1017/S1743921315004585",
                 issn = "17439213",
             language = "en",
        urlaccessdate = "27 abr. 2024"
}