1 / 28

Multi-instrument campaigns to observe the off-limb corona

Multi-instrument campaigns to observe the off-limb corona. Giulio Del Zanna STFC Adv. Fellow, MSSL/UCL UK V. Andretta 1 , G. Poletto 2 , Y.-K. Ko 3 , L.Teriaca 4 , H.Mason 5 A.Vourdilas 3 A. Bemporad 6 , M. Magri 1 1 INAF-Capodimonte, Napoli (IT) 2 INAF- Arcetri, Firenze (IT)

kelli
Télécharger la présentation

Multi-instrument campaigns to observe the off-limb corona

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Multi-instrument campaigns to observe the off-limb corona • Giulio Del Zanna • STFC Adv. Fellow, MSSL/UCL UK • V. Andretta1, G. Poletto2, Y.-K. Ko3 , L.Teriaca4, H.Mason5 • A.Vourdilas3 A. Bemporad6, M. Magri1 • 1INAF-Capodimonte, Napoli (IT) • 2INAF- Arcetri, Firenze (IT) • 3NRL, Washington DC (USA) • 4MPI, Lindau (Germany) • 5DAMTP, Univ.Cambridge (UK) • 6INAF-Torino (IT)

  2. General remarks about campaigns • A single instrument/satellite provides only a piece of the puzzle • Interpretations based on single instruments can turn out to be wrong • Fundamental for science to combine different datasets • Have you ever found the dataset which contains all the information you need to solve a problem ? (No) • Why bother observing the ‘same’ feature ? (the Sun changes and often does not cooperate) • Why is still so time consuming and complicated to coordinate campaigns ? • A big THANK YOU to all the instrument’s teams TRACE, Hinode, SOHO/CDS,SUMER, UVCS G. Del Zanna - 2nd Hinode science meeting, Boulder Oct 2008

  3. G. Del Zanna, V.Andretta, G. Poletto, H. Mason, Y.K. Ko, A. Vourdilas, A. Bemporad, M. Magri 2007 May 7-10 Ulysses quadratureHINODE HOP 7 • In May 2007 Ulysses was in quadrature with SOHO • Measure T,N, abundances in active regions as function of height from 1 to 1.7 Ro • Link them with in-situ measurements by Ulysses. • We needed • 1- an active region at the right time (planning constraints!) and place (around 45-60o s) 2- Co-spatial and co-temporal measurements from Hinode, SOHO (UVCS,CDS), TRACE, STEREO/EUVI Long shot !

  4. EIS + CDS + UVCS One month before One week before 10953 Del Zanna ARs G. Del Zanna - 2nd Hinode science meeting, Boulder Oct 2008

  5. The EIS sparse raster • 2” slit - 60s exposure • sparse raster (8” step): cover a large FOV in 1h • problems with Eclipses - Good signal in most lines G. Del Zanna - 2nd Hinode science meeting, Boulder Oct 2008

  6. 7,9,10 May 2007 9 May 10 May 7 May G. Del Zanna - 2nd Hinode science meeting, Boulder Oct 2008

  7. Line widths and tilt in the bottom EIS CCD Width Tilt The bottom is the best ! G. Del Zanna - 2nd Hinode science meeting, Boulder Oct 2008

  8. 7 9 10 May 2007 EIS Fe XII Doppler shift (+/-20 km/s) Non-thermal width (20-80 km/s) Density (cm-3) (7.5-9.5 log) G. Del Zanna - 2nd Hinode science meeting, Boulder Oct 2008

  9. He II - yet another complex blend Blend Bl -Si X Bl -Si X - Fe XIII Bl -Si X - Fe XIII - Fe XII Fe XII dd (Del Zanna & Mason 205) Bl -Si X - Fe XIII - Fe XII - Fe X Si X BR Fe XIII dd G. Del Zanna - 2nd Hinode science meeting, Boulder Oct 2008

  10. Polar plume campaign Oct-Nov 2007 V. Andretta, L.Teriaca, G. Poletto, Y-K, Ko Objectives: 1) On-disc: relate changes of the photospheric magnetic fields to corona study quasi-periodic oscillations at base of plumes with EIS (Not possible) 2) Off-limb: measure T,N, flows, abundances 1) Direct T: need to combine forbidden [Fe XII] 1242 A and [Fe XI] 1467 A (SUMER/UVCS) with allowed Fe XI,XII (EIS/CDS), and Mg IX. 2) Ne: CDS, SUMER, EIS 3) Chemical abundances: need to combine CDS, SUMER, UVCS with EIS Hinode HOP 44: Oct 30 -Nov 3 2007 SOHO/CDS,SUMER, UVCS, TRACE, STEREO ‘Unfortunately’, ourcampaign was mistaken for the SUMER campaign G. Del Zanna - 2nd Hinode science meeting, Boulder Oct 2008

  11. Off-limb Hinode/EIS: GDZ_PLUME1_2_300_50s 50s exp. , 2" slit step size 4” FOV=298"x512” in 1h 8m; 23 spectral windows. Run 4 times on 31/10, 1/11 and 34 times on 2-3/11 during SUMER campaign. SOHO/UVCS: Lya, O VI from 1.7 to 5.5 Ro Sun did not cooperate. Where were the plumes? TRACE: 171 A SOHOEIT Aug 96 G. Del Zanna - 2nd Hinode science meeting, Boulder Oct 2008

  12. SUMER and CDS radiances SOHO/SUMER: large (280"x300") raster in 30h 4” slit step 12.5” SOHO/CDS 4h 4” slit 120s exp. O V, Mg IX Composite of 9 NIS slit rasters G. Del Zanna - 2nd Hinode science meeting, Boulder Oct 2008

  13. EIS radiances 2-3 Nov 2007 G. Del Zanna - 2nd Hinode science meeting, Boulder Oct 2008

  14. Isothermal T from EIS Fe XII/Fe X G. Del Zanna - 2nd Hinode science meeting, Boulder Oct 2008

  15. Direct measurement of T from Mg IX First R-matrix calculation for Be-like Mg (Del Zanna Rozum Badnell 2008). Significant differences with the previous interpolated values (Keenan et al 1986). An inter-plume measurement at 1.3 Ro of 850 000 K by Wilhelm et al. (1998) revised to 1 160 000 K. G. Del Zanna - 2nd Hinode science meeting, Boulder Oct 2008

  16. END • Despite the various limitations (telemetry), there is a potential for very good science in combining Hinode with other satellites. • Hinode EIS off-limb observations are promising, in particular for QS,AR Thank you G. Del Zanna - 2nd Hinode science meeting, Boulder Oct 2008

  17. SUPPLEMENTARY MATERIAL G. Del Zanna - 2nd Hinode science meeting, Boulder Oct 2008

  18. Good signal in EIS off-limb G. Del Zanna - 2nd Hinode science meeting, Boulder Oct 2008

  19. SUMER Mg IX G. Del Zanna - 2nd Hinode science meeting, Boulder Oct 2008

  20. G. Del Zanna - 2nd Hinode science meeting, Boulder Oct 2008

  21. Mg IX G. Del Zanna - 2nd Hinode science meeting, Boulder Oct 2008

  22. First set (SW) Observations along the full 1024” slit2007 March 7 • Slit 1” • 30,120s exposures (chosen 120s) • 9 scan positions (averaged) • Rebinned along the slit (factor 2) • Low signal in most lines Bottom Top G. Del Zanna - 2nd Hinode science meeting, Boulder Oct 2008

  23. First set (LW) G. Del Zanna - 2nd Hinode science meeting, Boulder Oct 2008

  24. Third set (SW) Bottom Top G. Del Zanna - 2nd Hinode science meeting, Boulder Oct 2008

  25. Third set (LW) Bottom Top G. Del Zanna - 2nd Hinode science meeting, Boulder Oct 2008

  26. Line widths G. Del Zanna - 2nd Hinode science meeting, Boulder Oct 2008

  27. Densities G. Del Zanna - 2nd Hinode science meeting, Boulder Oct 2008

  28. Ntw CME 9 Apr G. Del Zanna - 2nd Hinode science meeting, Boulder Oct 2008

More Related