Small magnetic Small magnetic elementselements

Judith PalaciosJudith Palacios

USO-SP SCHOOLUSO-SP SCHOOLStockholm-Tammsvik, 2010Stockholm-Tammsvik, 2010

USO Trainee in Utrecht : Facular contrastUSO Trainee in Utrecht : Facular contrast Currently, PhD student at the University of Currently, PhD student at the University of

Valencia, SpainValencia, Spain The rest of the team: Vicente Domingo The rest of the team: Vicente Domingo

(supervisor), Iballa Cabello, Laura (supervisor), Iballa Cabello, Laura BalmacedaBalmaceda

Topics: small magnetic elements, vortices, Topics: small magnetic elements, vortices, irradiance, SUNRISE/IMaXirradiance, SUNRISE/IMaX

Some propaganda...Some propaganda...

AnnouncementAnnouncement of a 2-year POSTDOC position at the of a 2-year POSTDOC position at the

University of ValenciaUniversity of ValenciaSome of the tasks: Explotation of Some of the tasks: Explotation of SUNRISE/IMaX data and SO-PHI SUNRISE/IMaX data and SO-PHI

definitiondefinitionURGENT! SHOULD BE FILLED IN FEB!!URGENT! SHOULD BE FILLED IN FEB!!

Hinode and SST dataHinode and SST data A A quiet-Sunquiet-Sun region on region on 2007, 29 Sept2007, 29 Sept was selected in the was selected in the

center of the solar diskcenter of the solar disk. A image set was restored from . A image set was restored from 08:40 08:40 UT to 09:20 UTUT to 09:20 UT..

These data in These data in G-band in SSTG-band in SST were were rotated and aligned with rotated and aligned with magnetograms of MgI and CN filtergramsmagnetograms of MgI and CN filtergrams from Hinode. The from Hinode. The size of the area of interest (in coincidence with Hinode) issize of the area of interest (in coincidence with Hinode) is 19”18x74”0919”18x74”09. P-modes were removed.. P-modes were removed.

SST DATA PROCESSINGSST DATA PROCESSING

Image restoration with MOMFBD (Multi-Frame Blind Image restoration with MOMFBD (Multi-Frame Blind Deconvolution with Multiple Objects and Phase Diversity).Deconvolution with Multiple Objects and Phase Diversity).

(Courtesy of Iballa Cabello)(Courtesy of Iballa Cabello)

(Solar Image Restoration by use of Multi-Frame Blind Deconvolution with Multiple Objects and Phase Diversity, van Noort, M.; van der Voort, L.R. and Löfdahl, M. Solar Phys (2005) 228,191.)

SST G-band and MDI magnetogramSST G-band and MDI magnetogram

Small magnetic elements: recognition of GBPsSmall magnetic elements: recognition of GBPs

These GBP were found by These GBP were found by the method mentioned in the method mentioned in Sánchez Almeida et al 2004. Sánchez Almeida et al 2004. (GBP which appear in the (GBP which appear in the reference frame, stay in an reference frame, stay in an intergranular lane,and in 3 or intergranular lane,and in 3 or more snapshots). more snapshots).

The calculated area The calculated area coverage for GBP in the coverage for GBP in the surface is 0.26% . The area surface is 0.26% . The area coverage in Sánchez coverage in Sánchez Almeida et al is 0.5%Almeida et al is 0.5%

Properties of GBP (SST)Properties of GBP (SST)

Small magnetic elements: recognition of BP in Small magnetic elements: recognition of BP in Hinode CN Hinode CN

Multiple-level Multiple-level pattern recognition pattern recognition (MLT_4) of Bovelet, (MLT_4) of Bovelet, Wiehr 2007. This Wiehr 2007. This method was used method was used to detect BP in CN to detect BP in CN band.band.

Area coverage is Area coverage is 0.22%.0.22%.

Small magnetic elements: Small magnetic elements: properties of BP in Hinode CNproperties of BP in Hinode CN

Recognition of magnetic elements in MgI Recognition of magnetic elements in MgI magnetograms corresponding to CNmagnetograms corresponding to CN

Comparison of CN and Gband Comparison of CN and Gband struct.struct.

CNCN GbandGband Magnetic elemMagnetic elem

LifetimeLifetime 10 min 10 min 10min10min 10min10min

Max. Intensity Max. Intensity 1.251.25 1.81.8 0.006 (V/I)0.006 (V/I)

Area (’’^2)Area (’’^2) 0.060.06 0.020.02 0.050.05

Diameter (’’)Diameter (’’) 0.270.27 0.140.14 0.10.1

Surface coverageSurface coverage 0.22%0.22% 0.26%0.26% ----

More referencesMore references

Utz et al 2009 make a good statistical Utz et al 2009 make a good statistical study about the real lifetimes of GBPs, study about the real lifetimes of GBPs, considering cadence, splitting rates and considering cadence, splitting rates and proper motions.proper motions.

About lifetimes:About lifetimes: Utz (2009)Utz (2009)2.5min2.5min De Wijn (2008)De Wijn (2008) 10 min 10 min De Wijn (2005)De Wijn (2005) 3.5 min 3.5 min Almeida (2004)Almeida (2004) <10min <10min

THANKS FOR YOUR ATTENTION!!!THANKS FOR YOUR ATTENTION!!!