J16342+1631
SDSSJ163413.09+163109.4 · Culpan knownhsd
χ²/N = 0.98
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] | 38608 ± 787 |
| log g | 5.088 ± 0.092 |
| log n(He)/n(H) | -2.188 ± 0.120 |
| reduced χ² | 0.985 over 745 points |
| radial velocity | 94.0 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 19:09:44 |
Observation
| source file | spec-4064-55366-0104.fits |
Gaia astrometry
| Gaia DR3 source | 4465985437664273536 |
| parallax [mas] | 0.1552 ± 0.1518 |
| G | 18.285 |
| μα [mas/yr] | -2.017 |
| μδ [mas/yr] | -3.295 |
| l, b | 33.415, 37.629 |
Published (Culpan et al. 2022)
| class (Culpan) | sdOB |
| class (SIMBAD) | DAO |
| Teff [K] | 34600 ± 900 |
| log g | 4.73 ± 0.12 |
| log y | -2.00 ± 0.50 |
| reference | 2015A&A...577A..26G |
Fitted lines
| line | λ [Å] | shift [Å] | continuum at | ±avg | fitted over |
| Hβ | 4861.32 | 1.52 | -40.0, 40.0 | 5.0 | -45.0, 45.0 |
| Hγ | 4340.46 | 1.36 | -40.0, 36.8 | 4.5 | -43.0, 43.0 |
| Hδ | 4101.73 | 1.29 | -40.0, 31.6 | 4.2 | -43.0, 43.0 |
| Hε | 3970.07 | 1.24 | -28.0, 30.0 | 4.1 | -30.0, 35.0 |
| Hζ | 3889.05 | 1.22 | -20.0, 26.2 | 4.0 | -31.8, 32.0 |
| Hη | 3835.38 | 1.20 | -20.0, 14.6 | 4.0 | -20.7, 21.8 |
| Hθ | 3797.90 | 1.19 | -16.0, 16.0 | 3.9 | -15.6, 16.7 |
| Hι | 3770.63 | 1.18 | -13.0, 13.0 | 3.9 | -11.7, 11.6 |
| He II 4686 | 4685.70 | 1.47 | -11.9, 11.9 | 4.9 | -15.0, 13.8 |
| He II 5412 | 5411.52 | 1.70 | -15.0, 15.0 | 5.6 | -15.0, 15.0 |
| He II 4542 | 4541.59 | 1.42 | -15.0, 20.0 | 4.7 | -20.0, 20.0 |
| He II 4200 | 4199.84 | 1.32 | -23.5, 33.8 | 4.3 | -20.0, 20.0 |
| He I 4472 | 4471.60 | 1.40 | -15.0, 15.0 | 4.6 | -15.0, 15.0 |
| He I 4026 | 4026.29 | 1.26 | -24.2, 15.0 | 4.2 | -15.0, 15.0 |
| He I 4922 | 4921.93 | 1.54 | -15.0, 15.0 | 5.1 | -15.0, 15.0 |
Spectral energy distribution
Teff 38608 K · log g 5.088 · E(44−55) 0.138 · χ²r 0.47 over 10 bands
distance 6443 pc · parallax 0.1600 ± 0.1500 mas (94%) · R 0.1449 +0.2318 −0.0623 R☉ · M 0.093 +0.537 −0.063 M☉ · L 41.9 +242.4 −28.3 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.