Fig. 1. Stark–Zeeman (SZ)-broadened Balmer-series lines for N_e = 10¹⁷ cm⁻³, T_e = 5 eV, and B = (a) 100 T, (b) 500 T, and (c) 1 kT with (solid) and without (dashed) quadratic terms. The direction of observation is transverse to the B-field direction.

Fig. 2. G(Δω) calculated for hydrogen Lyman-α line at N_e = 10¹⁷ cm⁻³ and T_e = 5 eV for different B-field values that modify the cutoff frequency ω_L: B = 100 T (short-dash), B = 500 T (dot-dash), and B = 1 kT (double-dot-dash). For comparison, the G(Δω) functions are shown for the non-magnetized case (solid line).

Fig. 3. SZ Lyman-α line profiles of C VI, using the weak-field (dashed) and intermediate-field (solid) approximations for B = 100 T, N_e = 5 × 10¹⁹ cm⁻³, T_e = 100 eV. The short-dashed line corresponds to the pure Stark profile.

Fig. 4. As Fig. 3 but for B = 500 T.

Fig. 5. As Fig. 3 but for B = 10³ T.

Fig. 6. SZ C IV n = 4 to n = 5 polarized line profiles for N_e = 2 × 10¹⁹ cm⁻³, T = 10 eV, B = 0 (dot), B = 100 T (solid), B = 200 T (dash), B = 300 T (dot-dash), and B = 500 T (double-dot-dash): (a) σ components; (b) π components. The experimental results⁶⁴ are plotted with solid plus signs.

Fig. 7. Comparisons of SZ-broadened n = 4 to n = 5 line transitions for C IV (solid), N V (dash), and O VI (dot-dash) at B = 500 T, N_e = 2 × 10¹⁸ cm⁻³, T_e = 10 eV: (a) σ components; (b) π components.

Fig. 8. Polarization degree of C IV n = 4 to n = 5 lines for N_e = 2 × 10¹⁸ cm⁻³, T_e = 10 eV, B = 100 T (solid), B = 200 T (dash), B = 300 T (dot-dash), and B = 500 T (double-dot-dash).

Fig. 9. SZ line shapes, σ (solid) and π (dash) components, and corresponding polarization degree of O VI n = 4 to n = 5 lines for B = 100 T at N_e = 2 × 10¹⁸ cm⁻³ and T_e = 10 eV.

Fig. 10. Calculations of (a) Ar He-α and (b) He-β SZ spectral lines for N_e = 5 × 10²³ cm⁻³, T_e = 2 keV, B = 0 (solid), B = 20 kT (dash), and B = 40 kT (dot-dash). A convolution with an instrumental resolution of E/ΔE = 1800 is performed, and the observation is parallel to the magnetic field.