Spectropolarimetric characterisation of exoplanet host stars in preparation of the Ariel mission - Magnetic environment of HD 63433

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Volume 688 (August 2024)

A&A, 688 (2024) A63

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Table 3.

Activity indices and longitudinal magnetic field measurements.

Date	Instrument	S-index	$log R_{HK}^{'}$ $\log R^\prime_{\rm HK}$	Hα index	Ca II IRT	B_l
[dd-mm-yyyy]						[G]
12-09-2022	ESPaDOnS	0.433 ± 0.041	−4.345 ± 0.055	0.341 ± 0.002	0.899 ± 0.002	3.2 ± 0.9
22-12-2022	HARPSpol	…	…	0.339 ± 0.002	…	6.4 ± 2.0
24-12-2022	HARPSpol	…	…	0.339 ± 0.002	…	…
05-02-2023	HARPSpol	…	…	0.331 ± 0.003	…	…
06-03-2023	Neo-Narval	…	…	0.339 ± 0.002	0.880 ± 0.003	−5.1 ± 1.9
07-04-2023	Neo-Narval	…	…	0.337 ± 0.002	0.885 ± 0.003	−0.6 ± 1.9
08-04-2023	Neo-Narval	…	…	0.338 ± 0.002	0.889 ± 0.003	−3.3 ± 2.0
16-04-2023	Neo-Narval	…	…	0.340 ± 0.003	0.898 ± 0.005	3.6 ± 1.9
02-05-2023	Neo-Narval	…	…	0.336 ± 0.006	0.882 ± 0.006	−0.2 ± 2.8
05-05-2023	Neo-Narval	…	…	0.342 ± 0.007	0.910 ± 0.006	−9.4 ± 2.5

Notes. The error bar for S-index and $log R_{HK}^{'}$ $\log R^\prime_{\rm HK}$ is the standard deviation of the measurements from the four sub-exposures. For the Hα index, the Ca II IRT index and longitudinal magnetic field, they are obtained from formal propagation.

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