← the survey · confirmed composites · published sdB+dM · candidates · rejected · single stars
These are not statistics, they are specific claims to check. Every one is called a plain sdB by the classifier, so the published companion is not visible in the spectrum, and an infrared excess is the way to settle it. Their spectrum S/N is 23 to 32, below the baseline cut, so each is judged on its own evidence rather than counted.
The SED cannot settle these, and the honest answer is not “no companion”. The cool-star grid stops at 3500 K. The M dwarf in a reflection-effect sdB+dM sits near 3000 K — below that floor — and at several hundred parsecs it contributes a few per cent at W1. Where the table says a main-sequence companion warmer than 3500 K is excluded, 3500 K is the floor, not a measurement: the test bottomed out without reaching the temperatures these companions live at. A published sdB+dM is therefore left unsettled, not contradicted.
| target | published | automatic | auto σ | S/N | SED | IR σ | band | Δχ² |
|---|---|---|---|---|---|---|---|---|
| J03289+5035 | sdB+dM | sdB | — | 32 | unsettled · the grid floor | +6.3 | UKIDSS:H | 328.9 |
| J07107+6655 | sdB+dM | sdB | — | 23 | unsettled · the grid floor | +0.9 | WISE:W1 | — |
| J11472+6115 | sdBV+dM | sdB | — | 32 | unsettled · the grid floor | +1.1 | 2MASS:J | 0.4 |
| J20463+0626 | sdB+dM | sdB | — | 24 | unsettled · only above 4500 K | +0.0 | - | 0.0 |
published sdB+dM · automatic sdB · T₂ 8750 K · R₁ 0.1249 R☉ · R₂ 0.2650 R☉ (0.13× the main sequence at that temperature) · Δχ² 328.9 · infrared excess +6.3σ on UKIDSS:H
dchi2 is a REDDENING artefact -- held at the map's 0.207 against a fitted 0.352, and the fit answers with the hottest companion the grid has.
published sdB+dM · automatic sdB · T₂ 3500 K · R₁ 0.2315 R☉ · R₂ — R☉ (—× the main sequence at that temperature) · Δχ² — · infrared excess +0.9σ on WISE:W1
published sdBV+dM · automatic sdB · T₂ 3500 K · R₁ 0.2184 R☉ · R₂ 0.1170 R☉ (0.32× the main sequence at that temperature) · Δχ² 0.4 · infrared excess +1.1σ on 2MASS:J
held at the PUBLISHED Teff 29500 / log g 5.54 (Culpan+2022), NOT a profile fit of ours -- our scale runs at 0.97 of it with 9 per cent scatter.
published sdB+dM · automatic sdB · T₂ 8750 K · R₁ 0.3056 R☉ · R₂ 0.0536 R☉ (0.03× the main sequence at that temperature) · Δχ² 0.0 · infrared excess +0.0σ on -