J08301+4751sdB
PG0826+480 · 08:30:06.17 47:51:50.36 · Culpan knownhsd
χ²/N = 1.00
Spectrum
shaded: the intervals the fit used · │ a cancelled pixeldrag on either panel to zoom · dbl-click or Esc to reset · arrows to pan
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] | 26847 ± 301 |
| log g | 5.561 ± 0.053 |
| log n(He)/n(H) | -3.895 ± 0.482 |
| reduced χ² | 1.001 over 655 points |
| radial velocity | -187.0 km s−1 |
| resolution (FWHM) | 2.50 Å |
| lines fitted | 13 |
| grids | HE-0.041.fits HE-0.125.fits HE-0.300.fits HE-0.550.fits +9 more |
| fitted | 04/09/2026 18:29:14 |
Fit — Lei (TLUSTY)
| Teff [K] | 27030 ± 980 |
| log g | 5.570 ± 0.090 |
| log n(He)/n(H) | -3.430 ± 0.520 |
| grids | Lei et al. 2019, ApJ 881, 135 SYNSPEC 49 spectra from NLTE TLUSTY 204 model atmospheres, through XTgrid |
Observation
| S/N (classifier) | 66.7 |
| source file | spec-58099-HD082820N494114M02_sp01-126.fits.gz |
Gaia astrometry
| Gaia DR3 source | 930769616916994048 |
| parallax [mas] | 0.4775 ± 0.0538 |
| G | 16.040 |
| Gabs | 4.477 |
| μα [mas/yr] | -3.732 |
| μδ [mas/yr] | -7.062 |
| l, b | 171.808, 35.967 |
Published (Culpan et al. 2022)
| class (Culpan) | sdB+WD |
| class (SIMBAD) | sdB |
| Teff [K] | 25300 ± 600 |
| log g | 5.38 ± 0.06 |
| log y | -3.00 ± 0.00 |
| reference | 2015A&A...577A..26G |
Classifier
AGREES
fitted Teff 25300 logg 5.38 logY -3.0 2015A&A...577A..26G
auto: contrast 0.16, within the 0.30 a subdwarf reaches at 28 kK, Ca II 8662/8542 = 10.0 -- the star's own Paschen lines, not a companion
Fitted lines
| line | λ [Å] | shift [Å] | continuum at | ±avg | fitted over |
| Hβ | 4861.32 | -3.03 | -40.0, 40.0 | 5.0 | -45.0, 45.0 |
| Hγ | 4340.46 | -2.71 | -40.0, 36.8 | 4.5 | -43.0, 43.0 |
| Hδ | 4101.73 | -2.56 | -40.0, 31.6 | 4.2 | -43.0, 43.0 |
| Hε | 3970.07 | -2.48 | -28.0, 30.0 | 4.1 | -30.0, 35.0 |
| Hζ | 3889.05 | -2.43 | -20.0, 26.2 | 4.0 | -31.8, 32.0 |
| Hη | 3835.38 | -2.39 | -20.0, 14.6 | 4.0 | -20.7, 21.8 |
| Hθ | 3797.90 | -2.37 | -16.0, 16.0 | 3.9 | -15.6, 16.7 |
| Hι | 3770.63 | -2.35 | -13.0, 13.0 | 3.9 | -11.7, 11.6 |
| Hκ | 3750.15 | -2.34 | -10.0, 10.0 | 3.9 | -7.4, 8.7 |
| He II 4686 | 4685.70 | -2.92 | -11.9, 11.9 | 4.9 | -15.0, 13.8 |
| He I 4472 | 4471.60 | -2.79 | -15.0, 15.0 | 4.6 | -15.0, 15.0 |
| He I 4026 | 4026.29 | -2.51 | -24.2, 15.0 | 4.2 | -15.0, 15.0 |
| He I 4922 | 4921.93 | -3.07 | -15.0, 15.0 | 5.1 | -15.0, 15.0 |