J07367-0311sdB
LAMOSTJ073643.91-031145.2 · 07:36:43.92 -03:11:45.28 · 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] | 27914 ± 288 |
| log g | 5.521 ± 0.051 |
| log n(He)/n(H) | -1.089 ± 0.049 |
| reduced χ² | 1.000 over 636 points |
| radial velocity | -146.0 km s−1 |
| resolution (FWHM) | 2.50 Å |
| lines fitted | 12 |
| grids | HE-0.041.fits HE-0.125.fits HE-0.300.fits HE-0.550.fits +9 more |
| fitted | 04/09/2026 18:28:37 |
Fit — Lei (TLUSTY)
| Teff [K] | 28890 ± 400 |
| log g | 5.540 ± 0.040 |
| log n(He)/n(H) | -1.110 ± 0.040 |
| grids | Lei et al. 2018, ApJ 868, 70 SYNSPEC 49 spectra from NLTE TLUSTY 204 model atmospheres, through XTgrid |
Observation
| S/N (classifier) | 30.2 |
| source file | spec-57455-HD072742S030417V01_sp06-051.fits.gz |
Gaia astrometry
| Gaia DR3 source | 3060798513530161920 |
| parallax [mas] | 1.1784 ± 0.0350 |
| G | 13.734 |
| Gabs | 4.144 |
| μα [mas/yr] | -6.327 |
| μδ [mas/yr] | 4.088 |
| l, b | 221.013, 8.572 |
Published (Culpan et al. 2022)
| class (Culpan) | sdB |
| Teff [K] | 28965 ± 218 |
| log g | 5.42 ± 0.03 |
| log y | -1.12 ± 0.02 |
| reference | 2021ApJS..256...28L |
Classifier
AGREES
fitted Teff 28965 logg 5.42 logY -1.12 2021ApJS..256...28L
auto: contrast 0.12, within the 0.32 a subdwarf reaches at 27 kK, Mg I b suggests a companion but Ca II does not (-1.4 sigma)
Fitted lines
| line | λ [Å] | shift [Å] | continuum at | ±avg | fitted over |
| Hβ | 4861.32 | -2.37 | -40.0, 40.0 | 5.0 | -45.0, 45.0 |
| Hγ | 4340.46 | -2.11 | -40.0, 36.8 | 4.5 | -43.0, 43.0 |
| Hδ | 4101.73 | -2.00 | -40.0, 31.6 | 4.2 | -43.0, 43.0 |
| Hε | 3970.07 | -1.93 | -28.0, 30.0 | 4.1 | -30.0, 35.0 |
| Hζ | 3889.05 | -1.89 | -20.0, 26.2 | 4.0 | -31.8, 32.0 |
| Hη | 3835.38 | -1.87 | -20.0, 14.6 | 4.0 | -20.7, 21.8 |
| Hθ | 3797.90 | -1.85 | -16.0, 16.0 | 3.9 | -15.6, 16.7 |
| Hι | 3770.63 | -1.84 | -13.0, 13.0 | 3.9 | -11.7, 11.6 |
| He II 4686 | 4685.70 | -2.28 | -11.9, 11.9 | 4.9 | -15.0, 13.8 |
| He I 4472 | 4471.60 | -2.18 | -15.0, 15.0 | 4.6 | -15.0, 15.0 |
| He I 4026 | 4026.29 | -1.96 | -24.2, 15.0 | 4.2 | -15.0, 15.0 |
| He I 4922 | 4921.93 | -2.40 | -15.0, 15.0 | 5.1 | -15.0, 15.0 |