observation simulation - astro.up.pt fileobservation simulation log(r’ hk) = -4.9 log(r’ hk) =...
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Observation Simulation
Log(R’HK) = -4.9 Log(R’HK) = -4.8Number of spots per hemisphere 75 150Latitude of spots [°] 22.5 ± 2 15 ± 2Longitude of spots [°]Active longitudes in the north [°]Active longitudes in the south [°]Rotation of the star
Lifetime of spot groups
Presence of giant spot groups - 1 with a lifetime between 2 and 6 months
Maximum filling factor of spot groupsIncreasing phase of spot groupsDecreasing phase of spot groups
0 ± 15, 180 ± 15 (and sometimes 90 or 270 ±15)90 ± 15, 270 ± 15 (and sometimes 0 or 180 ±15)
spots on 4 to 6 active longitudes (number selected randomly)
differential rotation, 26 days on the equator50 % between 1h and 2 days, 40 % between 2 and 11 days,
10 % between 11 days and 2 months.
10-5 lifetime1/3 of the lifetime2/3 of the lifetime