the formation heights of cme-driven shocks using empirical alfvén maps of the solar corona pietro...
TRANSCRIPT
![Page 1: The formation heights of CME-driven shocks using empirical Alfvén maps of the solar corona Pietro Zucca, Eoin Carley, Shaun Bloomfield, Peter Gallagher](https://reader035.vdocuments.us/reader035/viewer/2022062804/56649e2b5503460f94b19bcc/html5/thumbnails/1.jpg)
The formation heights of CME-driven The formation heights of CME-driven shocks using empirical Alfvén maps of the shocks using empirical Alfvén maps of the
solar coronasolar corona
Pietro Zucca, Eoin Carley, Shaun Bloomfield, Peter
Gallagher
Trinity College Dublin
School of Physics, Trinity College Dublin, Ireland
![Page 2: The formation heights of CME-driven shocks using empirical Alfvén maps of the solar corona Pietro Zucca, Eoin Carley, Shaun Bloomfield, Peter Gallagher](https://reader035.vdocuments.us/reader035/viewer/2022062804/56649e2b5503460f94b19bcc/html5/thumbnails/2.jpg)
OverviewOverview
• Shocks in the solar corona and their radio signature
• Density and Alfvén speed of the solar corona
• Study of 2011 September 22 Type II radio burst
• Results and conclusions
![Page 3: The formation heights of CME-driven shocks using empirical Alfvén maps of the solar corona Pietro Zucca, Eoin Carley, Shaun Bloomfield, Peter Gallagher](https://reader035.vdocuments.us/reader035/viewer/2022062804/56649e2b5503460f94b19bcc/html5/thumbnails/3.jpg)
Type II radio burstType II radio burstPlasma Emission Shock Condition
Rosse Solar Terrestrial Observatory (RSTO; Zucca et al. 2012)
![Page 4: The formation heights of CME-driven shocks using empirical Alfvén maps of the solar corona Pietro Zucca, Eoin Carley, Shaun Bloomfield, Peter Gallagher](https://reader035.vdocuments.us/reader035/viewer/2022062804/56649e2b5503460f94b19bcc/html5/thumbnails/4.jpg)
(ne,t) (r,t)ne(r) model
From density to heightFrom density to height
2 orders of magnitude
![Page 7: The formation heights of CME-driven shocks using empirical Alfvén maps of the solar corona Pietro Zucca, Eoin Carley, Shaun Bloomfield, Peter Gallagher](https://reader035.vdocuments.us/reader035/viewer/2022062804/56649e2b5503460f94b19bcc/html5/thumbnails/7.jpg)
Density Map with SDO/AIA and Density Map with SDO/AIA and SOHO/LASCOSOHO/LASCO
B-Field with PSFFB-Field with PSFF
![Page 8: The formation heights of CME-driven shocks using empirical Alfvén maps of the solar corona Pietro Zucca, Eoin Carley, Shaun Bloomfield, Peter Gallagher](https://reader035.vdocuments.us/reader035/viewer/2022062804/56649e2b5503460f94b19bcc/html5/thumbnails/8.jpg)
Emission MeasureEmission Measure
Aschwanden et al. (2011)
1918 20 21 22 23
![Page 9: The formation heights of CME-driven shocks using empirical Alfvén maps of the solar corona Pietro Zucca, Eoin Carley, Shaun Bloomfield, Peter Gallagher](https://reader035.vdocuments.us/reader035/viewer/2022062804/56649e2b5503460f94b19bcc/html5/thumbnails/9.jpg)
Emission Measure to Emission Measure to DensityDensity
Menzel (1936)
The density can be estimated if we know the LOS length S(x,y)
![Page 11: The formation heights of CME-driven shocks using empirical Alfvén maps of the solar corona Pietro Zucca, Eoin Carley, Shaun Bloomfield, Peter Gallagher](https://reader035.vdocuments.us/reader035/viewer/2022062804/56649e2b5503460f94b19bcc/html5/thumbnails/11.jpg)
Plane Parallel Solution
Combined Model
Density ModelsDensity Models
Spherical Symmetric Solution
SDO/AIA data
SOHO/LASCO data
![Page 12: The formation heights of CME-driven shocks using empirical Alfvén maps of the solar corona Pietro Zucca, Eoin Carley, Shaun Bloomfield, Peter Gallagher](https://reader035.vdocuments.us/reader035/viewer/2022062804/56649e2b5503460f94b19bcc/html5/thumbnails/12.jpg)
Polar density MapPolar density Map
SDO/AIA 1-1.3 R
SOHO/LASCO 2.5-6 R
Model 1.3 - 2.5 R
Electron Density [cm-3][email protected]
![Page 13: The formation heights of CME-driven shocks using empirical Alfvén maps of the solar corona Pietro Zucca, Eoin Carley, Shaun Bloomfield, Peter Gallagher](https://reader035.vdocuments.us/reader035/viewer/2022062804/56649e2b5503460f94b19bcc/html5/thumbnails/13.jpg)
Density / Position Density / Position AngleAngle
![Page 16: The formation heights of CME-driven shocks using empirical Alfvén maps of the solar corona Pietro Zucca, Eoin Carley, Shaun Bloomfield, Peter Gallagher](https://reader035.vdocuments.us/reader035/viewer/2022062804/56649e2b5503460f94b19bcc/html5/thumbnails/16.jpg)
Alfvén Speed MapAlfvén Speed Map
2 RSun
150 300 600 1250 2500 5000
[email protected] et al. 2013, A&A in prep
![Page 17: The formation heights of CME-driven shocks using empirical Alfvén maps of the solar corona Pietro Zucca, Eoin Carley, Shaun Bloomfield, Peter Gallagher](https://reader035.vdocuments.us/reader035/viewer/2022062804/56649e2b5503460f94b19bcc/html5/thumbnails/17.jpg)
Study of 2011 Sep 22 Type II radio burstStudy of 2011 Sep 22 Type II radio burst
Using the 2D density and Alfvén maps
![Page 20: The formation heights of CME-driven shocks using empirical Alfvén maps of the solar corona Pietro Zucca, Eoin Carley, Shaun Bloomfield, Peter Gallagher](https://reader035.vdocuments.us/reader035/viewer/2022062804/56649e2b5503460f94b19bcc/html5/thumbnails/20.jpg)
Height-time Height-time comparisoncomparison
EUV propagating feature Type II radio burst
![Page 26: The formation heights of CME-driven shocks using empirical Alfvén maps of the solar corona Pietro Zucca, Eoin Carley, Shaun Bloomfield, Peter Gallagher](https://reader035.vdocuments.us/reader035/viewer/2022062804/56649e2b5503460f94b19bcc/html5/thumbnails/26.jpg)
ConclusionsConclusions
• 2D density and Alfvén maps
• Non-radial study of Type II burst – CME
• Shock formed in the ‘Upper-flank’ region