J01441+5402

LAMOSTJ014408.84+540210.7 · Culpan knownhsd

χ²/N = 0.97

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]	54423 ± 1248
log g	5.785 ± 0.054
log n(He)/n(H)	-2.178 ± 0.053
reduced χ²	0.973 over 747 points
radial velocity	76.0 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
fitted	04/09/2026 18:25:35

Fit — Lei (TLUSTY)

T_eff [K]	44900 ± 520
log g	5.790 ± 0.420
log n(He)/n(H)	-2.340 ± 0.100
grids	Lei et al. 2019, ApJ 881, 135 SYNSPEC 49 spectra from NLTE TLUSTY 204 model atmospheres, through XTgrid

Observation

source file

spec-57641-HD014347N555238B01_sp01-095.fits.gz

Gaia astrometry

Gaia DR3 source	408127652396870400
parallax [mas]	0.4324 ± 0.0495
G	16.212
G_abs	4.480
μ_α [mas/yr]	1.849
μ_δ [mas/yr]	-1.482
l, b	130.703, -8.038

Published (Culpan et al. 2022)

class (Culpan)	sdO
T_eff [K]	50787 ± 556
log g	5.54 ± 0.03
log y	-2.35 ± 0.09
reference	2021ApJS..256...28L

Fitted lines

line	λ [Å]	shift [Å]	continuum at	±avg	fitted over
H_β	4861.32	1.23	-40.0, 40.0	5.0	-45.0, 45.0
H_γ	4340.46	1.10	-40.0, 36.8	4.5	-43.0, 43.0
H_δ	4101.73	1.04	-40.0, 31.6	4.2	-43.0, 43.0
H_ε	3970.07	1.01	-28.0, 30.0	4.1	-30.0, 35.0
H_ζ	3889.05	0.99	-20.0, 26.2	4.0	-31.8, 32.0
H_η	3835.38	0.97	-20.0, 14.6	4.0	-20.7, 21.8
H_θ	3797.90	0.96	-16.0, 16.0	3.9	-15.6, 16.7
H_ι	3770.63	0.96	-13.0, 13.0	3.9	-11.7, 11.6
He II 4686	4685.70	1.19	-11.9, 11.9	4.9	-15.0, 13.8
He II 5412	5411.52	1.37	-15.0, 15.0	5.6	-15.0, 15.0
He II 4542	4541.59	1.15	-15.0, 20.0	4.7	-20.0, 20.0
He II 4200	4199.84	1.06	-23.5, 33.8	4.3	-20.0, 20.0
He I 4472	4471.60	1.13	-15.0, 15.0	4.6	-15.0, 15.0
He I 4026	4026.29	1.02	-24.2, 15.0	4.2	-15.0, 15.0
He I 4922	4921.93	1.25	-15.0, 15.0	5.1	-15.0, 15.0