J14520+4533

SDSSJ145203.94+453329.6 · 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]	46831 ± 659
log g	6.111 ± 0.059
log n(He)/n(H)	-1.977 ± 0.102
reduced χ²	0.994 over 744 points
radial velocity	126.0 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 19:09:17

Observation

source file

spec-6737-56365-0380.fits

Gaia astrometry

Gaia DR3 source	1586890398971315200
parallax [mas]	0.2860 ± 0.0701
G	17.194
μ_α [mas/yr]	-5.680
μ_δ [mas/yr]	-0.821
l, b	78.545, 59.811

Published (Culpan et al. 2022)

class (Culpan)	sdO
class (SIMBAD)	sdO
T_eff [K]	49358 ± 5000
log g	5.56 ± 0.20
log y	-2.01 ± 0.40
reference	2009PhDT.......273H

Fitted lines

line	λ [Å]	shift [Å]	continuum at	±avg	fitted over
H_β	4861.32	2.04	-40.0, 40.0	5.0	-45.0, 45.0
H_γ	4340.46	1.82	-40.0, 36.8	4.5	-43.0, 43.0
H_δ	4101.73	1.72	-40.0, 31.6	4.2	-43.0, 43.0
H_ε	3970.07	1.67	-28.0, 30.0	4.1	-30.0, 35.0
H_ζ	3889.05	1.63	-20.0, 26.2	4.0	-31.8, 32.0
H_η	3835.38	1.61	-20.0, 14.6	4.0	-20.7, 21.8
H_θ	3797.90	1.60	-16.0, 16.0	3.9	-15.6, 16.7
H_ι	3770.63	1.58	-13.0, 13.0	3.9	-11.7, 11.6
He II 4686	4685.70	1.97	-11.9, 11.9	4.9	-15.0, 13.8
He II 5412	5411.52	2.27	-15.0, 15.0	5.6	-15.0, 15.0
He II 4542	4541.59	1.91	-15.0, 20.0	4.7	-20.0, 20.0
He II 4200	4199.84	1.77	-23.5, 33.8	4.3	-20.0, 20.0
He I 4472	4471.60	1.88	-15.0, 15.0	4.6	-15.0, 15.0
He I 4026	4026.29	1.69	-24.2, 15.0	4.2	-15.0, 15.0
He I 4922	4921.93	2.07	-15.0, 15.0	5.1	-15.0, 15.0

Spectral energy distribution

T_eff 46831 K · log g 6.111 · E(44−55) 0.026 · χ²_r 0.18 over 26 bands

distance 3496 pc · parallax 0.2900 ± 0.0700 mas (24%) · R 0.1166 +0.0381 −0.0229 R☉ · M 0.642 +0.506 −0.234 M☉ · L 59.0 +44.9 −21.0 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.