J13259-0323

SDSSJ132556.93-032329.6 · Culpan knownhsd

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]	51084 ± 2116
log g	6.032 ± 0.130
log n(He)/n(H)	-2.617 ± 0.314
reduced χ²	0.980 over 743 points
radial velocity	-190.0 km s⁻¹
resolution (FWHM)	2.00 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 19:08:59

Observation

source file

spec-108356-60469-27021598146751731.fits

Gaia astrometry

Gaia DR3 source	3637042077927661056
parallax [mas]	0.4347 ± 0.1447
G	17.967
μ_α [mas/yr]	-4.391
μ_δ [mas/yr]	-8.290
l, b	319.521, 58.364

Published (Culpan et al. 2022)

class (Culpan)	sdO
class (SIMBAD)	sdO
T_eff [K]	53272 ± 5000
log g	5.77 ± 0.20
log y	-2.23 ± 0.40
reference	2009PhDT.......273H

Fitted lines

line	λ [Å]	shift [Å]	continuum at	±avg	fitted over
H_β	4861.32	-3.08	-40.0, 40.0	5.0	-45.0, 45.0
H_γ	4340.46	-2.75	-40.0, 36.8	4.5	-43.0, 43.0
H_δ	4101.73	-2.60	-40.0, 31.6	4.2	-43.0, 43.0
H_ε	3970.07	-2.52	-28.0, 30.0	4.1	-30.0, 35.0
H_ζ	3889.05	-2.46	-20.0, 26.2	4.0	-31.8, 32.0
H_η	3835.38	-2.43	-20.0, 14.6	4.0	-20.7, 21.8
H_θ	3797.90	-2.41	-16.0, 16.0	3.9	-15.6, 16.7
H_ι	3770.63	-2.39	-13.0, 13.0	3.9	-11.7, 11.6
He II 4686	4685.70	-2.97	-11.9, 11.9	4.9	-15.0, 13.8
He II 5412	5411.52	-3.43	-15.0, 15.0	5.6	-15.0, 15.0
He II 4542	4541.59	-2.88	-15.0, 20.0	4.7	-20.0, 20.0
He II 4200	4199.84	-2.66	-23.5, 33.8	4.3	-20.0, 20.0
He I 4472	4471.60	-2.83	-15.0, 15.0	4.6	-15.0, 15.0
He I 4026	4026.29	-2.55	-24.2, 15.0	4.2	-15.0, 15.0
He I 4922	4921.93	-3.12	-15.0, 15.0	5.1	-15.0, 15.0

Spectral energy distribution

T_eff 51084 K · log g 6.032 · E(44−55) 0.036 · χ²_r 0.32 over 10 bands

distance 2300 pc · parallax 0.4300 ± 0.1400 mas (33%) · R 0.0515 +0.0258 −0.0128 R☉ · M 0.105 +0.133 −0.046 M☉ — below the 0.47 canonical mass · L 16.3 +20.3 −7.1 L☉

Photometry against the model, with the residual beneath it in units of the error. The horizontal bar on each point is the passband, not an error; a hollow point was not fitted and the tooltip says why. Drag a box to zoom, double-click or Esc to come back out.