J22080+0233
PG2205+023 · Culpan knownhsd
outside the grid χ²/N = 0.99
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] | 26406 ± 133 |
| log g | 5.645 ± 0.020 |
| log n(He)/n(H) | -5.885 ± 0.605 upper limit |
| reduced χ² | 0.989 over 659 points |
| radial velocity | -71.0 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 |
| settled | outside the grid |
| fitted | 04/09/2026 18:33:48 |
Fit — Lei (TLUSTY)
| Teff [K] | 27610 ± 300 |
| log g | 5.620 ± 0.010 |
| log n(He)/n(H) | -3.000 ± 0.000 |
| grids | Lei et al. 2019, ApJ 881, 135 SYNSPEC 49 spectra from NLTE TLUSTY 204 model atmospheres, through XTgrid |
| helium | published as a limit |
Observation
| cosmic rays | 6 pixels cancelled |
| source file | spec-57330-EG220307N031056M01_sp08-131.fits.gz |
Gaia astrometry
| Gaia DR3 source | 2683585696429935488 |
| parallax [mas] | 1.4036 ± 0.0339 |
| G | 14.108 |
| Gabs | 4.884 |
| μα [mas/yr] | -18.392 |
| μδ [mas/yr] | -16.287 |
| l, b | 63.391, -40.699 |
Published (Culpan et al. 2022)
| class (Culpan) | sdB |
| class (SIMBAD) | sdB2VIIIpHe0 |
| Teff [K] | 27100 ± 500 |
| log g | 5.51 ± 0.05 |
| log y | -4.00 ± 0.00 |
| reference | 2013A&A...557A.122G |
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 |
| Hι | 3770.63 | -0.89 | -13.0, 13.0 | 3.9 | -11.7, 11.6 |
| Hκ | 3750.15 | -0.89 | -10.0, 10.0 | 3.9 | -7.4, 8.7 |
| He II 4686 | 4685.70 | -1.11 | -11.9, 11.9 | 4.9 | -15.0, 13.8 |
| 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 |