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Proposal to the PROBA 2 Guest Investigator Program. June 1, 2010. Study of the solar inner corona and search for coronal streams from active regions using SWAP off-disk observations. PI: Vladimir Slemzin, LPI, Moscow Co-I: Sergey Kuzin, Alexander Urnov, Farid Goryaev - LPI - PowerPoint PPT Presentation
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Study of the solar inner corona and search for coronal streams from active regions using SWAP
off-disk observations
PI: Vladimir Slemzin, LPI, MoscowCo-I: Sergey Kuzin, Alexander Urnov, Farid Goryaev - LPI Louise Harra – MSSL/UCL
Proposal to the PROBA 2 Guest Investigator Program. June 1, 2010
SPIRIT studies of the inner corona (Slemzin et al., AnGeo 2008)
Proposal to the PROBA 2 Guest Investigator Program. June 1, 2010
R=1.1
Helmet-like structure
Overlay of the disk and corona images
Stray lightStray lightIn the Hershel telescopes the level of straylight is lower than in the Ritchey-Chretien In the Hershel telescopes the level of straylight is lower than in the Ritchey-Chretien telescopes telescopes (large mirror- detector distance, no elements in between)(large mirror- detector distance, no elements in between)PSF is measured during eclipsesPSF is measured during eclipses
304 A 175 A2002-06-11 01:06:40 5
Radial distribution at the equatorial plane
Ts =1.53 MK
1.62 MK
1.32 MK
Hydrostatic approach: radial distribution of radiation in EUV emission lines excited by collisions (I ~ Ne
2)
sun
ss
sssun
RmgkTH
rrHrrTrErHRrI
0
0
00
2/3 )(2exp),()(
- density scale of height
Ts – hydrostatic temperature
12
Quiet sun04/04/96
Active sun16/06/02
Sources of the solar windQuasi-stationary solar wind
at 1 AU
fast SW (600-800 km/s)
slow SW (400-600 km/s)
Quasi-stationary coronal streams (from several days to several rotations)
Streams from polar coronal holes, polar rays and plumes
WL streamers
Streams from ARs, low-latitude CHs
Transient solar wind (200-700 km/s)
Transient streams (several hours) CME Jets small-scale events
Main task and goals of the proposal Main task: to study the global and local structure of the
solar inner corona from the limb to ~ 2 Rsun by means of the SWAP off-disk EUV observations in coordination with Hinode/EIS.
Goals: • Global survey of the inner corona at rising solar activity
and comparison of its structure with measurements at solar maximum (SPIRIT) and deep minimum (TESIS).
• Search of the solar wind streams from active regions.
• Determination of physical properties of the coronal streams and other local magneto-plasma formations.
Association of the solar wind streams with solar sources
1).Temporal correlation between the solar wind variations and the solar rotation
2). Outflows from solar sources detected by the Doppler shift of coronal lines
3). Tracing of the coronal rays from the solar source to the outer corona (streamer)
4). Ionic composition of the plasma in the solar source and at 1 AU
FIP bias (enhanced FIP abundances)Fe/O ratio O+7/ O+6 ratio (freeze-in temperature)
SWAP data
1x10s 100x10s equatorial scan
Proposal to the PROBA 2 Guest Investigator Program. June 1, 2010
100x10s
Proposal to the PROBA 2 Guest Investigator Program. June 1, 2010
N W S E N
1x10s
Proposal to the PROBA 2 Guest Investigator Program. June 1, 2010
SWAP – LASCO C2
Global view of the inner corona combined from 4 SWAP off-point images (±10’)
LASCO C2 FOV LED
Doppler velocity
Intensity
Outflows of up to 50 km/s are seen in the boundary of AR, Harra et al. (2008).
Proposal to the PROBA 2 Guest Investigator Program. June 1, 2010
Detection of coronal outflows with Hinode/EIS
Hinode/EIS data
• Two EUV bands: 170-210 Å and 250-290 Å• CCD camera; Two 2048 x 1024 high QE back illuminated CCDs• Spatial resolution: 1 arc sec pixels/2 arc sec resolution• Line spectroscopy:• ~ 25 km/s per pixel sampling• ± 3 km/s with ~ 200 counts in a line profile• Field of View:
– Raster: 6 arc min × 8.5 arc min (max height: 17 arc min)– FOV centre moveable E – W by ± 15 arc min
• Wide temperature coverage: log T = 4.9, 5.3, 5.4, 5.8, 6.0 - 7.3 K• 4 slit/slots – 1”, 2”, 40”, 266”
Proposal to the PROBA 2 Guest Investigator Program. June 1, 2010
TESIS – EIS comparison1 August 2009 8 August 2009
Proposal to the PROBA 2 Guest Investigator Program. June 1, 2010
TESIS Fe IX-X 171 AAR near small CH
Proposal to the PROBA 2 Guest Investigator Program. June 1, 2010
TESIS 1-8 August 2009
Hinode/XRT TESIS 01/08/2010 18:05 UT 01/08/2010 11:26 UT
Proposal to the PROBA 2 Guest Investigator Program. June 1, 2010
Proposal to the PROBA 2 Guest Investigator Program. June 1, 2010
TESIS FeIX-X 171 A EIS FeXII 195 A intensity
Proposal to the PROBA 2 Guest Investigator Program. June 1, 2010
TESIS FeIX-X 171 A EIS FeXII 195 A Doppler velocity
outflow
Proposal to the PROBA 2 Guest Investigator Program. June 1, 2010
Proposal to the PROBA 2 Guest Investigator Program. June 1, 2010
Proposal to the PROBA 2 Guest Investigator Program. June 1, 2010
TESIS – LASCO C2
CH
CH
AR
Solar wind data - ACE
Working plan of the research1). Study of the quiet corona by full global survey of the inner corona
up to 2 Rsun in 4 off-limb positions. Comparison with the TESIS and SPIRIT data
2). Search of coronal streams originated from active regions (SWAP in coordination with Hinode/EIS):- Search of the coronal outflows in the active regions near the center of the disk and selection the target object (EIS). - Observation of the targeted AR during a week (SWAP in standard mode, 10s/1 min);- Search of the coronal rays from the targeted AR at the limb (SWAP in the W- off-disk mode, 100x10s series, during 2-3 days). The ray should be identified as a bright line having a counterpart in the WL streamer.
3). Diagnostics of plasma in the limb region of the coronal rays and nearby in the corona by the DEM method (using the EIS data in the off-limb mode):Te, Ne, FIP bias
Proposal to the PROBA 2 Guest Investigator Program. June 1, 2010
Timeline of observations22/06 SWAP global view (4 pos*100 frames) - Rot.019/07 SWAP global view (4 pos*100 frames) - Rot.111/08 SWAP solar eclipse15/08 SWAP global view (4 pos*100 frames) - Rot.212/09 SWAP global view (4 pos*100 frames) - Rot.3
T0 EIS start of monitoring ARs at the disk
T1 EIS outflow detection -> warning to SWAPT1+6d SWAP two-days off-point monitoring (W-limb) position of rays –>
warning to EISEIS monitoring the ray and nearby regions at the limb
Plan of visits and presentations5-19/11 2010 visit to ROB processing of the data, preparation
of LPI – 2, MSSL-1 the report on structure of the global 15 days inner corona to ESWW 2010
(Brugge, 15-19/11 2010)
20/03 – 2/04 2011 visit to ROB processing of the data, preparation of LPI – 1, MSSL-1 the report of preliminary results to EGU 15 days 2011 (Vienna, 3-8 April 2011).