J03383-5758
Culpan hotsd
χ²/N = 1.01
Spectrum
The whole reduced spectrum above, the region marked on it below. Shaded bands are the intervals the fit used; a tick under the axis marks a pixel the rejection mask cancelled.
Line-profile fit — Bamberg
Results and provenance
Fit — Bamberg
| Teff [K] | 50429 ± 2131 |
| log g | 6.126 ± 0.144 |
| log n(He)/n(H) | -2.140 ± 0.196 |
| reduced χ² | 1.009 over 745 points |
| radial velocity | -198.0 km s−1 |
| resolution (FWHM) | 2.00 Å |
| lines fitted | 15 |
| grids | HE-0.041.fits HE-0.125.fits HE-0.300.fits HE-0.550.fits +9 more |
| fitted | 04/09/2026 19:07:28 |
Observation
| source file | spec-110095-60285-63050395801109703.fits |
Gaia astrometry
| Gaia DR3 source | 4729626958543290368 |
| parallax [mas] | 0.3950 ± 0.0375 |
| G | 16.335 |
| BP − RP | -0.351 |
| Gabs | 4.317 |
| μα [mas/yr] | 15.304 |
| μδ [mas/yr] | 5.600 |
| RUWE | 1.004 |
| l, b | 271.342, -47.625 |
| selection | f_plx |
Fitted lines
| line | λ [Å] | shift [Å] | continuum at | ±avg | fitted over |
| Hβ | 4861.32 | -3.21 | -40.0, 40.0 | 5.0 | -45.0, 45.0 |
| Hγ | 4340.46 | -2.87 | -40.0, 36.8 | 4.5 | -43.0, 43.0 |
| Hδ | 4101.73 | -2.71 | -40.0, 31.6 | 4.2 | -43.0, 43.0 |
| Hε | 3970.07 | -2.62 | -28.0, 30.0 | 4.1 | -30.0, 35.0 |
| Hζ | 3889.05 | -2.57 | -20.0, 26.2 | 4.0 | -31.8, 32.0 |
| Hη | 3835.38 | -2.53 | -20.0, 14.6 | 4.0 | -20.7, 21.8 |
| Hθ | 3797.90 | -2.51 | -16.0, 16.0 | 3.9 | -15.6, 16.7 |
| Hι | 3770.63 | -2.49 | -13.0, 13.0 | 3.9 | -11.7, 11.6 |
| He II 4686 | 4685.70 | -3.09 | -11.9, 11.9 | 4.9 | -15.0, 13.8 |
| He II 5412 | 5411.52 | -3.57 | -15.0, 15.0 | 5.6 | -15.0, 15.0 |
| He II 4542 | 4541.59 | -3.00 | -15.0, 20.0 | 4.7 | -20.0, 20.0 |
| He II 4200 | 4199.84 | -2.77 | -23.5, 33.8 | 4.3 | -20.0, 20.0 |
| He I 4472 | 4471.60 | -2.95 | -15.0, 15.0 | 4.6 | -15.0, 15.0 |
| He I 4026 | 4026.29 | -2.66 | -24.2, 15.0 | 4.2 | -15.0, 15.0 |
| He I 4922 | 4921.93 | -3.25 | -15.0, 15.0 | 5.1 | -15.0, 15.0 |
Spectral energy distribution
Component 1, the subdwarf: Teff 50429 K (held) · log g 6.126 (held) · R 0.1193 R☉ (fitted, with the companion) · χ²r 0.99 over 37 bands
E(44−55) 0.039 (held)
Component 2, the companion: Teff 4625 K (fitted, 3500–8750 K grid) · log g 4.50 (held) · R 0.4615 R☉ (fitted) · χ²r 0.13 for the two components together (Δχ² 127 over one star, same bands)
The dashed curves beneath the model are the two components of this fit: the subdwarf alone and the cool companion.
distance 2532 pc · parallax 0.4000 ± 0.0400 mas (10%) · M 0.918 +0.242 −0.181 M☉ — above the 0.47 canonical mass · (from the ONE-star scale -- not corrected for the companion's light) · L 109.7 +24.5 −18.5 L☉
Photometry against the model, with the residual beneath it in units of the error. The horizontal bar on each point is the passband, not an error; a hollow point was not fitted and the tooltip says why. Drag a box to zoom, double-click or Esc to come back out.