J08034+3421

SDSSJ080327.93+342140.7 · 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]	40460 ± 533
log g	5.601 ± 0.059
log n(He)/n(H)	-2.972 ± 0.193
reduced χ²	0.990 over 744 points
radial velocity	28.0 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 18:28:57

Fit — Lei (TLUSTY)

T_eff [K]	39300 ± 410
log g	5.430 ± 0.040
log n(He)/n(H)	-3.090 ± 0.200
grids	Lei et al. 2019, ApJ 881, 135 SYNSPEC 49 spectra from NLTE TLUSTY 204 model atmospheres, through XTgrid

Observation

source file

spec-56246-GAC121N33B1_sp15-208.fits.gz

Gaia astrometry

Gaia DR3 source	905650346067635968
parallax [mas]	0.5646 ± 0.0451
G	15.047
G_abs	3.881
μ_α [mas/yr]	-4.391
μ_δ [mas/yr]	-7.942
l, b	186.752, 28.978

Published (Culpan et al. 2022)

class (Culpan)	sdOB
class (SIMBAD)	sd
T_eff [K]	39177 ± 381
log g	5.48 ± 0.04
log y	-3.10 ± 0.11
reference	2021ApJS..256...28L

Fitted lines

line	λ [Å]	shift [Å]	continuum at	±avg	fitted over
H_β	4861.32	0.45	-40.0, 40.0	5.0	-45.0, 45.0
H_γ	4340.46	0.41	-40.0, 36.8	4.5	-43.0, 43.0
H_δ	4101.73	0.38	-40.0, 31.6	4.2	-43.0, 43.0
H_ε	3970.07	0.37	-28.0, 30.0	4.1	-30.0, 35.0
H_ζ	3889.05	0.36	-20.0, 26.2	4.0	-31.8, 32.0
H_η	3835.38	0.36	-20.0, 14.6	4.0	-20.7, 21.8
H_θ	3797.90	0.35	-16.0, 16.0	3.9	-15.6, 16.7
H_ι	3770.63	0.35	-13.0, 13.0	3.9	-11.7, 11.6
He II 4686	4685.70	0.44	-11.9, 11.9	4.9	-15.0, 13.8
He II 5412	5411.52	0.51	-15.0, 15.0	5.6	-15.0, 15.0
He II 4542	4541.59	0.42	-15.0, 20.0	4.7	-20.0, 20.0
He II 4200	4199.84	0.39	-23.5, 33.8	4.3	-20.0, 20.0
He I 4472	4471.60	0.42	-15.0, 15.0	4.6	-15.0, 15.0
He I 4026	4026.29	0.38	-24.2, 15.0	4.2	-15.0, 15.0
He I 4922	4921.93	0.46	-15.0, 15.0	5.1	-15.0, 15.0