Secrets behind the RXTE/ASM light curve of Cyg X-3 - Feedback between wind-fed accretion and luminosity

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Table 1

EUV fluxes (EUV = EF_E in units of 2 × 10³⁶ erg s⁻¹ at 100 eV), model luminosities (L_bol = L_eqpair 10³⁸ erg s⁻¹), and wind velocities (Vwind km s⁻¹) without the gravitational pull of the compact star at its distance on the face-on side and wind-fed accretion power P_acc (10³⁸ erg s⁻¹) for the spectral states used.

PARAM	NOX	HARD	SNTH	INT	US	VH
EUV	0	0.25	0.45	0.77	1.04	1.26
L_eqpair	0	1.56	2.18	2.02	3.51	4.05
V_wind	1360	1010	906	840	797	762
P_acc	1.35	3.72	4.32	5.21	5.91	6.55

Notes. The acronyms used stand for the following: NOX = no X-ray irradiation, HARD = hard, SNTH = soft nonthermal, INT = intermediate, US = ultra soft, and VH = very high. The standard NOX β-velocity model has V_inf = 1600 km s⁻¹ and β = 0.5.

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