Assessing the capability of a model-based stellar XUV estimation

Open Access

Table 1

Target objects in this study and their observed parameters.

Name	R_* (R_⊙)	log g	T_eff (K)	M_* (M_⊙)	L_* (L_⊙)	B_* f_* (kG)	Φ_* (10²⁵ Mx)
Sun (min)	1.00	4.44	5777	1.00	1.00	5.4 ×10^{-3 (1)}	3.3 ×10^-2
Sun (max)	1.00	4.44	5777	1.00	1.00	9.0 ×10^-3(1)	5.5 ×10^-2
κ¹ Ceti	0.97	4.46 ⁽²⁾	5749 ⁽²⁾	1.00 ⁽²⁾	0.93	0.50 ⁽⁴⁾	2.9
π¹ UMa	1.00	4.44 ⁽²⁾	5873 ⁽²⁾	1.00 ⁽²⁾	1.06	0.59 ⁽⁴⁾	3.6
EK Dra	1.07	4.40 ⁽³⁾	5770 ⁽³⁾	1.04 ⁽³⁾	1.14	1.4 ⁽⁴⁾	9.8

Notes. The second column shows the stellar radius R_* (in solar radii), the third column shows the logarithm (base 10) of the surface gravity $g = G M_{*} / R_{*}^{2}$ $g = G{M_*}/R_*^2$ (in cgs unit), the fourth column shows the effective temperature T_eff, the fifth column presents the stellar mass M_* (in solar mass) calculated by log g and R_*, the sixth column displays the luminosity $L_{*} = 4 π R_{*}^{2} σ T_{eff}^{4}$ ${L_*} = 4\pi R_*^2\sigma T_{{\rm{eff}}}^4$ (in solar luminosity), the seventh column shows the average surface magnetic field strength B_*f_*, and the eighth column presents the unsigned surface magnetic flux $Φ_{*} = 4 π R_{*}^{2} B_{*} f_{*}$ ${\Phi _*} = 4\pi R_*^2{B_*}{f_*}$ (1) Cranmer (2017), (2) Gonzalez et al. (2010), (3) Şenavcı et al. (2021), (4) Kochukhov et al. (2020).

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