Table 5
Best-fitting parameters {a1, b1, c1} associated to the stellar granulation component in the Harvey functions given in Eq. (1) and found for CHEOPS, ESPRESSO and TESS datasets of HD 67458 and HD 88595.
| Target | Instrument | a1 | b1 | c1 |
|---|---|---|---|---|
| HD | CHEOPS | 0.64 ± 0.01 | 2005 ± 44 | 3.04 ± 0.19 |
| 67458 | ESPRESSO | 938 ± 15 | 110±12 | 3.44 ± 0.02 |
| TESS | ∅ | ∅ | ∅ | |
| HD | CHEOPS | 1.44 ± 0.02 | 875 ± 18 | 2 ± 0.01 |
| 88595 | ESPRESSO | 2000 ± 3 | 270.0 ± 0.3 | 2.0 ± 0.01 |
| TESS | ∅ | ∅ | ∅ | |
| Sun | VIRGO | 0.86 ± 0.08 | 2065.9 ± 147 | 3.8 ± 0.66 |
| VIRGO + WGN | 0.31 ± 0.05 | 3405 ± 332 | 3.3 ± 1.1 |
Notes. The best-fitting parameters found for the solar VIRGO data without and with white noise added are shown in the two last rows. Symbol ∅ highlights the nondetection cases (i.e., parameters {a1, b1, c1} consistent with zero within their 1σ uncertainties). Parameter a1 is in units of ppm2/µHz or m2/s2/µHz, and parameter b1 in units of µHz.
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