Table 6
Analysis results of the DQ Vel V-band light-curve.
| Quantity | Remarks | |
|
|
||
| n | 583 | Number of observations. |
| Σ(O − C)2 | 0.3984 | Final sum of the residuals square between observed (LCO) and synthetic (LCC) light-curves. |
| σ rms | 0.0258 | Root-mean-square of the residuals. |
| i [°] | 82.5 ± 0.2 | Orbit inclination (in arc degrees). |
| Fdisc = Rdisc/Ryc | 0.89 ± 0.03 | Disc dimension factor (the ratio of the disc radius to the critical Roche lobe radius along the y-axis). |
| Tdisc [K] | 6580 ± 300 | Disc-edge temperature. |
| de [aorb] | 0.019 ± 0.005 | Disc thicknesses at the edge in the units of the distance between the components. |
| dc [aorb] | 0.011 ± 0.005 | Disc thicknesses at the centre in the units of the distance between the components. |
| a T | 4.5 ± 0.3 | Disc temperature distribution coefficient. |
| F g | 0.271 ± 0.005 | Filling factor for the critical Roche lobe of the gainer in synchronous rotation regime. |
| Tg [K] | 18 500 ± 500 | Temperature of the gainer. |
| Ahs = Ths/Tdisc | 1.45 ± 0.1 | Hot-spot temperature coefficient. |
| θhs [°] | 16.0 ± 2.0 | Hot-spot angular dimension. |
| λhs [°] | 329.1 ± 7.0 | Hot-spot longitude (in arc degrees). |
| θrad [°] | −19.7 ± 5.0 | Angle between the line perpendicular to the disc edge and the direction of the hot spot. |
| Abs = Tbs/Tdisc | 1.39 ± 0.1 | Bright-spot temperature coefficient. |
| θbs [°] | 50.1 ± 5.0 | Bright-spot angular dimension. |
| λbs [°] | 142.7 ± 9.0 | Bright-spot longitude (in arc degrees). |
| Ωg | 8.45 ± 0.02 | Dimensionless surface potentials of the gainer. |
| Ωd | 2.49 ± 0.02 | Dimensionless surface potentials of the donor. |
| Mg [M⊙] | 7.3 ± 0.3 | Mass of the gainer (in solar masses). |
| Md [M⊙] | 2.2 ± 0.2 | Mass of the donor (in solar masses). |
| Rg [R⊙] | 3.6 ± 0.2 | Mean radius of the gainer (in solar radii). |
| Rd [R⊙] | 8.4 ± 0.2 | Mean radius of the donor (in solar radii). |
| log gg | 4.2 ± 0.1 | Logarithm of the gainer’s effective gravity. |
| log gd | 2.9 ± 0.1 | Logarithm of the donor’s effective gravity. |
|
−3.1 ± 0.2 | Absolute bolometric magnitude of the gainer. |
|
−1.9 ± 0.1 | Absolute bolometric magnitude of the donor. |
| aorb [R⊙] | 29.7 ± 0.3 | Orbital semi-major axis. |
| Rdisc [R⊙] | 12.9 ± 0.3 | Disc radius (in solar radii). |
| de [R⊙] | 0.6 ± 0.1 | Disc thicknesses at the edge in solar units. |
| dc [R⊙] | 0.3 ± 0.1 | Disc thicknesses at the centre in solar units. |
Notes.Fixed parameters: q = Md/Mg = 0.31 – mass ratio of the components, Td = 9400 K – temperature of the less-massive donor, Fd = 1.0 – filling factor for the critical Roche lobe of the donor, fg,d = 1.00 – synchronous rotation coefficients of the system components, βg,d = 0.25 – gravity-darkening coefficients of the components, Ag,d = 1.0 – albedo coefficients of the components.
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