Unravelling sub-stellar magnetospheres | Astronomy & Astrophysics (A&A)

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Table 2

Same as Table 1, except now the values are estimated from the ATCA data of J0623 obtained in Aug. and Dec. of 2022.

Parameter	14/8/2022		16/12/2022
β (º)	Fixed	${50.48}_{- 0.79}^{+ 0.78}$ $50.48_{ - 0.79}^{ + 0.78}$	Fixed	${50.81}_{- 1.05}^{+ 1.00}$ $50.81_{ - 1.05}^{ + 1.00}$
θ₁ (º)	25.01 ± 0.20	${42.35}_{- 0.18}^{+ 0.17}$ $42.35_{ - 0.18}^{ + 0.17}$	${23.98}_{- 0.30}^{+ 0.29}$ $23.98_{ - 0.30}^{ + 0.29}$	${42.90}_{- 0.26}^{+ 0.27}$ $42.90_{ - 0.26}^{ + 0.27}$
θ₂ (º)	${21.11}_{- 0.22}^{+ 0.21}$ $21.11_{ - 0.22}^{ + 0.21}$	${39.62}_{- 0.33}^{+ 0.32}$ $39.62_{ - 0.33}^{ + 0.32}$	${21.22}_{- 0.39}^{+ 0.37}$ $21.22_{ - 0.39}^{ + 0.37}$	${38.97}_{- 0.46}^{+ 0.42}$ $38.97_{ - 0.46}^{ + 0.42}$
ϕ₁ (º)	125.54 ± 0.36	${124.14}_{- 0.49}^{+ 0.55}$ $124.14_{ - 0.49}^{ + 0.55}$	${127.74}_{- 0.57}^{+ 0.58}$ $127.74_{ - 0.57}^{ + 0.58}$	${123.81}_{- 0.63}^{+ 0.67}$ $123.81_{ - 0.63}^{ + 0.67}$
ϕ₂ (º)	${227.63}_{- 0.49}^{+ 0.47}$ $227.63_{ - 0.49}^{ + 0.47}$	${235.59}_{- 0.65}^{+ 0.63}$ $235.59_{ - 0.65}^{ + 0.63}$	${227.52}_{- 0.84}^{+ 0.86}$ $227.52_{ - 0.84}^{ + 0.86}$	${237.19}_{- 0.67}^{+ 0.64}$ $237.19_{ - 0.67}^{ + 0.64}$
F₁ (mJy)	${2.34}_{- 0.06}^{+ 0.07}$ $2.34_{ - 0.06}^{ + 0.07}$	${1.46}_{- 0.03}^{+ 0.02}$ $1.46_{ - 0.03}^{ + 0.02}$	2.05 ± 0.09	1.05 ± 0.03
F₂ (mJy)	2.52 ± 0.07	${1.21}_{- 0.09}^{+ 0.10}$ $1.21_{ - 0.09}^{ + 0.10}$	2.14 ± 0.09	${2.92}_{- 0.55}^{+ 0.67}$ $2.92_{ - 0.55}^{ + 0.67}$

log 𝒵	−577	−571	−282	−308
log 𝓛	−544	−535	−251	−276
$χ_{red,low}^{2}$ $\chi _{{\rm{red,low}}}^2$	3.65	2.14	1.41	1.75
$χ_{red,high}^{2}$ $\chi _{{\rm{red,high}}}^2$	1.41	2.39	1.80	0.94
$χ_{red,noise}^{2}$ $\chi _{{\rm{red,noise}}}^2$	0.55	0.85	0.71	0.41

Notes. The results shown in the columns where β is listed as ‘Fixed’ assume the same value for β as inferred from the MeerKAT data. Otherwise, β is unconstrained. The values of θ₁ and θ₂ correspond to emission at 2.43 GHz for Aug. and 2.1 GHz for Dec. respectively (see Appendix C.2). The reduced χ² values are again computed between the data and the average model lightcurve over the low and high frequency bands. The low band is from 1.3 to 2.43 GHz for the Aug. data, and 1.3–2.1 GHz for Dec. data. We also include the reduced χ² between the noise bands, which are 2.43–3.1 GHz and 2.1–3.1 GHz for the Aug. and Dec. data respectively.

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