J08133+5257sdO
GALEXJ08133+5257 · 08:13:19.82 52:57:06.44 · Culpan knownhsd
χ²/N = 0.97
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] | 45826 ± 466 |
| log g | 6.131 ± 0.042 |
| log n(He)/n(H) | -1.826 ± 0.073 |
| reduced χ² | 0.967 over 742 points |
| radial velocity | -118.0 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 19:07:50 |
Observation
| telescope | SDSS 2.5-M |
| survey / programme | OPEN_FIBER / open_fiber |
| field · MJD | 102915 · 59974 |
| date | 2023-01-30 |
| catalogid | 27021597917733591 |
| exposure | 900 s in 1 |
| airmass | 1.07 |
| seeing (50%) | 1.47″ |
| E(B−V) | 0.034 |
| pipeline | v6_2_1 |
| cosmic rays | 7 pixels cancelled |
| S/N (classifier) | 31.3 |
| source file | spec-102915-59974-27021597917733591.fits |
Gaia astrometry
| Gaia DR3 source | 1031713889677183360 |
| parallax [mas] | 1.1086 ± 0.0436 |
| G | 14.202 |
| BP − RP | -0.534 |
| Gabs | 4.455 |
| μα [mas/yr] | -5.078 |
| μδ [mas/yr] | -18.233 |
| l, b | 165.512, 33.469 |
Published (Culpan et al. 2022)
| class (Culpan) | sdB |
| class (SIMBAD) | sdB |
Classifier
DISPUTED
auto: He II/He I 6.4, EW 0.95, Mg I b suggests a companion but Ca II does not (-0.8 sigma)
Fitted lines
| line | λ [Å] | shift [Å] | continuum at | ±avg | fitted over |
| Hβ | 4861.32 | -1.91 | -40.0, 40.0 | 5.0 | -45.0, 45.0 |
| Hγ | 4340.46 | -1.71 | -40.0, 36.8 | 4.5 | -43.0, 43.0 |
| Hδ | 4101.73 | -1.61 | -40.0, 31.6 | 4.2 | -43.0, 43.0 |
| Hε | 3970.07 | -1.56 | -28.0, 30.0 | 4.1 | -30.0, 35.0 |
| Hζ | 3889.05 | -1.53 | -20.0, 26.2 | 4.0 | -31.8, 32.0 |
| Hη | 3835.38 | -1.51 | -20.0, 14.6 | 4.0 | -20.7, 21.8 |
| Hθ | 3797.90 | -1.49 | -16.0, 16.0 | 3.9 | -15.6, 16.7 |
| Hι | 3770.63 | -1.48 | -13.0, 13.0 | 3.9 | -11.7, 11.6 |
| He II 4686 | 4685.70 | -1.84 | -11.9, 11.9 | 4.9 | -15.0, 13.8 |
| He II 5412 | 5411.52 | -2.13 | -15.0, 15.0 | 5.6 | -15.0, 15.0 |
| He II 4542 | 4541.59 | -1.79 | -15.0, 20.0 | 4.7 | -20.0, 20.0 |
| He II 4200 | 4199.84 | -1.65 | -23.5, 33.8 | 4.3 | -20.0, 20.0 |
| He I 4472 | 4471.60 | -1.76 | -15.0, 15.0 | 4.6 | -15.0, 15.0 |
| He I 4026 | 4026.29 | -1.58 | -24.2, 15.0 | 4.2 | -15.0, 15.0 |
| He I 4922 | 4921.93 | -1.94 | -15.0, 15.0 | 5.1 | -15.0, 15.0 |
Spectral energy distribution
Teff 45826 K · log g 6.131 · E(44−55) 0.046 · χ²r 0.73 over 42 bands
distance 902 pc · parallax 1.1100 ± 0.0400 mas (4%) · R 0.1235 +0.0052 −0.0048 R☉ · M 0.754 +0.114 −0.099 M☉ — above the 0.47 canonical mass · L 60.6 +5.4 −4.8 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.