HOP 0472

proposer

name :

James, Yardley, Buchlin, Franci

e-mail :

alexander.james[at]ucl.ac.uk, s.l.yardley[at]reading.ac.uk,
eric.buchlin[at]universite-paris-saclay.fr, l.franci[at]imperial.ac.uk

abstract of observational proposal

Main Objective: To investigate sources of the fast solar wind in a coronal hole, such as EUV bright points and jets

Scientific Justification: To support the Solar Orbiter Fast Wind observing programme with spectroscopic observations of plasma flows and composition measurements.

Coordination of Hinode/EIS with SO/SPICE observations taken during the fast solar wind connection SOOP observation window (between 24/10/2023 11:30 UT and 26/10/2023 21:46 UT, ~ 2.5 days) is requested to investigate and link composition of a fast solar wind source region using a range of composition diagnostics to plasma detected in situ.

request to XRT

Exact details to be coordinated with the chief planner.
Equatorial coronal hole target. Dynamics study. Suggestion of Al-Poly with 30s cadence and 374”x374”
FOV, as per previous slow solar wind coordination that looked at CH boundary. Run as often as possible in coordination with EIS.

request to EIS

Exact details to be coordinated with the chief planner.
Equatorial coronal hole target. When SO/SPICE runs SPICE_COMPOSITION, Hinode/EIS runs
Atlas_180 (ID: 620), FOV: 120”x160”, Exp: 180s, Dur: 3h.
At any other time, SO/SPICE runs SPICE_DYNAMICS, and Hinode/EIS runs CH_funnels_FIPv3 (ID: 635), FOV: 132”x512”, Exp: 90s, Dur: 100min. EIS team to confirm if longer exposure time is needed. If the target coronal hole is large, stitch multiple ID 635 observations together to increase FOV. Please run as many times as possible.

SO/SPICE will run SPICE_COMPOSITION during the following time windows:
24/10/2023: 11:30 - 16:52 UT, 23:42 - 05:04 UT
25/10/2023: 11:54 - 17:16 UT
26/10/2023: 00:06 - 05:28 UT, 12:18 - 17:40 UT

SO/SPICE will run SPICE_DYNAMICS during the following time windows:
24/10/2023: 16:55 - 23:41 UT
25/10/2023: 05:07 - 11:53 UT, 17:19 - 00:05 UT
26/10/2023: 05:31 - 12:17 UT, 17:43 - 21:47 UT

EIS studies have highest priority, so we are willing to sacrifice XRT observations if there is a possibility of additional telemetry for those observations.

other participating instruments

IRIS requests:
Request sent to IRIS team. Proposal similar to IHOP 0455.

SOOP: L_Small_HRES_HCAD_Fast-Wind
https://s2e2.cosmos.esa.int/confluence/display/SOSP/Solar+Orbiter+Planning+-+for+coordination+with+external+parties
Potential coordination with SST on 25 and 26 October from 09:00-11:00 UT.

remarks

Target(s) of interest: Upflow regions and jets within an equatorial coronal hole (on-disc).

Dates: 24 October 2023 - 26 October 2023 (inclusive). Three consecutive days are required to support fast wind SOOP.

Time window: 24 October @ 11:30 UT until 26 October @ 21:47 UT. SO/SPICE will observe continuously throughout this period, so support from Hinode/EIS is desired.

High resolution observations by EUI/HRI and PHI/HRT will take place on 24 Oct from 11:45-13:45 UT, 25 Oct 09:00-11:00 UT, 26 Oct 09:00-11:00 UT, so please prioritise these times. Potential coordination with SST on 25 & 26 October from 09:00-11:00 UT. Short interruptions allowed.

Target(s) of interest: Equatorial coronal hole. If no equatorial CH is available, observe polar CH or other potential solar wind source.

Previous HOPs: No prior HOP submissions as PI.