J19410-5246
EC19371-5253 · Culpan knownhsd
χ²/N = 0.98
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] | 49609 ± 1121 |
| log g | 5.842 ± 0.138 |
| log n(He)/n(H) | 0.314 ± 0.119 |
| reduced χ² | 0.979 over 719 points |
| radial velocity | 71.0 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 19:10:24 |
Observation
| source file | spec-025386-60145-27021599438414487.fits |
Gaia astrometry
| Gaia DR3 source | 6642621850497112192 |
| parallax [mas] | 0.2859 ± 0.0493 |
| G | 15.659 |
| Gabs | 3.089 |
| μα [mas/yr] | -0.331 |
| μδ [mas/yr] | -4.050 |
| l, b | 345.219, -28.607 |
Published (Culpan et al. 2022)
| class (Culpan) | He-sdO |
| class (SIMBAD) | sdOC7VII:He39 |
| Teff [K] | 51290 ± 1436 |
| log g | 5.83 ± 0.27 |
| log y | 0.58 ± 0.29 |
| reference | 2021MNRAS.501..623J |
Fitted lines
| line | λ [Å] | shift [Å] | continuum at | ±avg | fitted over |
| Hβ | 4861.32 | 1.15 | -40.0, 40.0 | 5.0 | -45.0, 45.0 |
| Hγ | 4340.46 | 1.03 | -40.0, 36.8 | 4.5 | -43.0, 43.0 |
| Hδ | 4101.73 | 0.97 | -40.0, 31.6 | 4.2 | -43.0, 43.0 |
| Hε | 3970.07 | 0.94 | -28.0, 30.0 | 4.1 | -30.0, 35.0 |
| Hζ | 3889.05 | 0.92 | -20.0, 26.2 | 4.0 | -31.8, 32.0 |
| Hη | 3835.38 | 0.91 | -20.0, 14.6 | 4.0 | -20.7, 21.8 |
| Hθ | 3797.90 | 0.90 | -16.0, 16.0 | 3.9 | -15.6, 16.7 |
| H\d11 3770.63 ---- | |||||
| He II 4686 | 4685.70 | 1.11 | -11.9, 11.9 | 4.9 | -15.0, 13.8 |
| He II 5412 | 5411.52 | 1.28 | -15.0, 15.0 | 5.6 | -15.0, 15.0 |
| He II 4542 | 4541.59 | 1.08 | -15.0, 20.0 | 4.7 | -20.0, 20.0 |
| He II 4200 | 4199.84 | 0.99 | -23.5, 33.8 | 4.3 | -20.0, 20.0 |
| He I 4472 | 4471.60 | 1.06 | -15.0, 15.0 | 4.6 | -15.0, 15.0 |
| He I 4026 | 4026.29 | 0.95 | -24.2, 15.0 | 4.2 | -15.0, 15.0 |
| He I 4922 | 4921.93 | 1.17 | -15.0, 15.0 | 5.1 | -15.0, 15.0 |
Spectral energy distribution
Component 1, the subdwarf: Teff 49609 K (held) · log g 5.842 (held) · R 0.2363 R☉ (fitted, with the companion) · χ²r 0.54 over 36 bands
E(44−55) 0.050 (held)
Component 2, the companion: Teff 4000 K (fitted, 3500–8750 K grid) · log g 4.50 (held) · R 0.7254 R☉ (fitted) · χ²r 0.44 for the two components together (Δχ² 51 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 3498 pc · parallax 0.2900 ± 0.0500 mas (17%) · M 1.456 +0.713 −0.422 M☉ — above the 0.47 canonical mass · (from the ONE-star scale -- not corrected for the companion's light) · L 312.9 +145.2 −85.6 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.