J04432+2313

LAMOSTJ044314.47+231303.4 · Culpan knownhsd

χ²/N = 0.99

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]	41660 ± 895
log g	5.439 ± 0.087
log n(He)/n(H)	-3.518 ± 0.303
reduced χ²	0.995 over 745 points
radial velocity	-164.0 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 18:26:41

Fit — Lei (TLUSTY)

T_eff [K]	36390 ± 860
log g	5.400 ± 0.280
log n(He)/n(H)	-3.000 ± 0.000
grids	Lei et al. 2020, ApJ 889, 117 SYNSPEC 49 spectra from NLTE TLUSTY 204 model atmospheres, through XTgrid

Observation

cosmic rays	3 pixels cancelled
source file	spec-56626-GAC069N25B2_sp07-246.fits.gz

Gaia astrometry

Gaia DR3 source	146588028382865280
parallax [mas]	0.5254 ± 0.0424
G	15.886
G_abs	4.655
μ_α [mas/yr]	4.114
μ_δ [mas/yr]	-4.515
l, b	176.583, -14.730

Published (Culpan et al. 2022)

class (Culpan)	sdOB
T_eff [K]	38051 ± 414
log g	5.61 ± 0.06
log y	-4.30 ± 0.37
reference	2021ApJS..256...28L

Fitted lines

line	λ [Å]	shift [Å]	continuum at	±avg	fitted over
H_β	4861.32	-2.66	-40.0, 40.0	5.0	-45.0, 45.0
H_γ	4340.46	-2.37	-40.0, 36.8	4.5	-43.0, 43.0
H_δ	4101.73	-2.24	-40.0, 31.6	4.2	-43.0, 43.0
H_ε	3970.07	-2.17	-28.0, 30.0	4.1	-30.0, 35.0
H_ζ	3889.05	-2.13	-20.0, 26.2	4.0	-31.8, 32.0
H_η	3835.38	-2.10	-20.0, 14.6	4.0	-20.7, 21.8
H_θ	3797.90	-2.08	-16.0, 16.0	3.9	-15.6, 16.7
H_ι	3770.63	-2.06	-13.0, 13.0	3.9	-11.7, 11.6
He II 4686	4685.70	-2.56	-11.9, 11.9	4.9	-15.0, 13.8
He II 5412	5411.52	-2.96	-15.0, 15.0	5.6	-15.0, 15.0
He II 4542	4541.59	-2.48	-15.0, 20.0	4.7	-20.0, 20.0
He II 4200	4199.84	-2.30	-23.5, 33.8	4.3	-20.0, 20.0
He I 4472	4471.60	-2.45	-15.0, 15.0	4.6	-15.0, 15.0
He I 4026	4026.29	-2.20	-24.2, 15.0	4.2	-15.0, 15.0
He I 4922	4921.93	-2.69	-15.0, 15.0	5.1	-15.0, 15.0