General description
Science Goal: What are the release mechanisms of the slow solar wind at an open-closed magnetic field boundary? (See Slow Wind SOOP slides)
Aims:
- Link in-situ plasma to specific coronal source regions,
- Observe the magnetic field configuration and its evolution at open-closed boundaries
- Identify possibly signatures of interchange reconnection at open-closed boundaries
Target: active region/coronal hole boundary, dependent upon magnetic connectivity
Default SOOP duration: 3 days
Pointing requirements: Off-pointing: specific target pointing or target tracking
Triggers: only IS triggers enabled
Observations requirement (baseline)
Instrument | Mode | Comment |
---|---|---|
EPD | close mode + scheduled/triggered burst | |
MAG | MAG_EQUAL8_BURST | normal + scheduled/triggered burst Low-latency data useful |
RPW | RPW_NORMAL_HIGH1 | normal + scheduled/triggered burst |
SWA | SWA_PAS_NORMAL11_BURST_11 | normal + scheduled/triggered burst Low-latency data useful |
SPICE | Combination of: SPICE_SPECTRATLAS, SPICE_COMPOSITION, SPICE_DYNAMICS | Raster area should be optimised to make sure open-closed field boundary is captured Line choices optimized for type of target Run combination of: - spectral atlas, full spectrum, FOV=2’x11’, duration ~53 minutes - A composition map, 60 s exposure time, FOV=10.6’x11’, duration of 2.7 hours, lines included: O III 70.3 nm multiplet - slow dynamic study (synoptic type), 30 s exposure time, FOV=12.8’x11’, duration of 1.6 hours, 5/6 repetitions of this study according to the time available and spacecraft constraints (e.g. WOLs, HGA_PT), spectral lines included: O III 70.3 nm multiplet |
EUI | EUV & LYA Coronal hole modes (C) (uses HRI) at 6s cadence FSI Synoptic mode (S) throughout at 900s | If TM is limited, varying priority schema can be used to keep HRI data manageable (FSI_Synoptic_B) |
PHI | Regularly spaced HRT data at medium to high resolution (~3-5 mins) e.g. + regular PHI_synoptic_4 | PHI LL magnetograms needed throughout. Processing after the RSW: PHI could focus downlink on the most interesting periods, as inferred from other LL data |
Metis | for context and linkage of solar wind source regions to SC Only applicable if beyond ~0.5AU during target tracking | |
SoloHI | Context via SoloHI synoptic modes | |
STIX | STIX_ANALYSIS | not strictly needed for SOOP although context is appreciated |
Science objectives
SAP objective | Target | Duration | Opportunity/Orbital configuration | Operational constraints | Additional comments |
---|---|---|---|---|---|
1.1.2.2 Does slow and intermediate solar wind originate from coronal loops outside of coronal holes? | coronal loops outside of coronal holes | few days |
|
| radial alignment with SPP is a plus |
1.2.2.6 Study fast plasma flows from the edges of solar active regions discovered with Hinode/EIS | edges of solar active regions - at most likely ballistic connection point | few hours |
|
| radial alignment with SPP is a plus |
Open-Closed field line boundaries (near ballistic connection point):
Target tracking | ~1 RSW (10 days) |
|
| radial alignment with SPP is a plus | |
1.2.2.5 Magnetic reconnection in the chromosphere, the transition region and the corona | |||||
Quiet Sun at various latitudes. | several days | low + high latitue, to be repeated along the cycle |
| Only PHI, EUI/HRI and SPICE really necessary for this goal. PHI/HRT mode 2 with 5-10 min cadence, 5 quantities and no binning EUI/HRT follows cadence of PHI |
To be discussed whether any of the following can be linked:
1.1.3.1 Fine structures in the photosphere (Full characterization of photospheric magnetic fields)
1.1.3.3 What is the distribution of the open magnetic flux?
1.2.1.7 Detect and characterise waves in closed and open structures
Instances run / planned
LTP6 (run):
2022-03-03 to 06, 2022-03-17 to 22 (SOOP Coordinators: S. Yardley)
The slow wind connection SOOP operated with the baseline observations outlined above.
LTP11 (planned)
2022-03-30 to 04-02, then 2023-04-22 to 04-24 (SOOP Coordinators: S. Yardley, A. James)
Science outcomes
Yardley et al. (2022, in prep): Slow Solar Wind Connection Science during Solar Orbiter’s First Close Perihelion Passage
Ngampoopun et al. (2022, in prep): Southern Polar Coronal Hole Boundary: Investigating the eruption of a filament channel and its merging with the southern polar coronal hole
Boundary
Baker et al. (2022, in prep): Observational Evidence of S-web Source of Slow Solar Qind
Berghmans et al. (2022, in prep): First Perihelion of EUI
Further information
(see Yardley et al. 2022, in prep)
RSW1 Target: NOAA active region complex including ARs 12955, 12957, 12961
RSW2 Targets:
- Southern polar coronal hole boundary (2022-03-17 06 UT – 2022-03-18 18:40 UT)
- NOAA AR 12967 (2022-03-18 18:40UT – 2022-03-22 00UT)
Coordinated Observations: Hinode and IRIS through IHOPs 433 and 434.
Original SOOP proposers
C. Owen, Hardi Peter, Tim Horbury, Pradeep Chitta (Obj 4), D. Spadaro, A. Giunta, L. Harra, D. Baker
2 Comments
Anonymous
(Andreas Lagg): This SOOP also covers the scientific plan proposed by Hardi Peter: "Solar wind variations on supergranular scales"
Anik De Groof
SOOP ID in SOOP Kitchen = LS2