J13415+0454sdO

PG1339+052 · 13:41:31.49 04:54:46.76 · Culpan knownhsd

outside the grid 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

Observed spectrum in black, model in red, offset by line. Balmer series left, helium right.

Results and provenance

Fit — Bamberg

T_eff [K]	55657 ± 2021
log g	6.786 ± 0.154
log n(He)/n(H)	-1.259 ± 0.144
reduced χ²	0.980 over 743 points
radial velocity	-147.0 km s⁻¹
resolution (FWHM)	2.50 Å
lines fitted	15
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 18:31:04

Fit — Lei (TLUSTY)

T_eff [K]	59430 ± 4100
log g	6.380 ± 0.110
log n(He)/n(H)	-1.590 ± 0.190
grids	Lei et al. 2019, ApJ 881, 135 SYNSPEC 49 spectra from NLTE TLUSTY 204 model atmospheres, through XTgrid

Observation

S/N (classifier)	66.8
source file	spec-56392-HD135024N052949M01_sp10-081.fits.gz

Gaia astrometry

Gaia DR3 source	3714909426982422272
parallax [mas]	0.7015 ± 0.0595
G	16.197
G_abs	5.421
μ_α [mas/yr]	-0.656
μ_δ [mas/yr]	-7.626
l, b	333.393, 64.780

Published (Culpan et al. 2022)

class (Culpan)	sdO
class (SIMBAD)	sdO
T_eff [K]	80000 ± 2973
log g	6.42 ± 0.09
log y	-1.21 ± 0.11
reference	2021ApJS..256...28L

Classifier

AGREES

fitted Teff 80000 logg 6.42 logY -1.21 2021ApJS..256...28L

auto: He II/He I 8.5, EW 1.28, Mg I b suggests a companion but Ca II does not (0.1 sigma); contrast 0.02 over the 0.02 expected at 66 kK

Fitted lines

line	λ [Å]	shift [Å]	continuum at	±avg	fitted over
H_β	4861.32	-2.38	-40.0, 40.0	5.0	-45.0, 45.0
H_γ	4340.46	-2.13	-40.0, 36.8	4.5	-43.0, 43.0
H_δ	4101.73	-2.01	-40.0, 31.6	4.2	-43.0, 43.0
H_ε	3970.07	-1.95	-28.0, 30.0	4.1	-30.0, 35.0
H_ζ	3889.05	-1.91	-20.0, 26.2	4.0	-31.8, 32.0
H_η	3835.38	-1.88	-20.0, 14.6	4.0	-20.7, 21.8
H_θ	3797.90	-1.86	-16.0, 16.0	3.9	-15.6, 16.7
H_ι	3770.63	-1.85	-13.0, 13.0	3.9	-11.7, 11.6
He II 4686	4685.70	-2.30	-11.9, 11.9	4.9	-15.0, 13.8
He II 5412	5411.52	-2.65	-15.0, 15.0	5.6	-15.0, 15.0
He II 4542	4541.59	-2.23	-15.0, 20.0	4.7	-20.0, 20.0
He II 4200	4199.84	-2.06	-23.5, 33.8	4.3	-20.0, 20.0
He I 4472	4471.60	-2.19	-15.0, 15.0	4.6	-15.0, 15.0
He I 4026	4026.29	-1.97	-24.2, 15.0	4.2	-15.0, 15.0
He I 4922	4921.93	-2.41	-15.0, 15.0	5.1	-15.0, 15.0