J14471+5116

SDSSJ144709.19+511639.8 · 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]	51056 ± 1031
log g	5.977 ± 0.230
log n(He)/n(H)	0.220 ± 0.165
reduced χ²	0.987 over 749 points
radial velocity	5.0 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 19:09:14

Observation

source file

spec-6725-56390-0918.fits

Gaia astrometry

Gaia DR3 source	1593521583660586112
parallax [mas]	0.1488 ± 0.1607
G	18.753
μ_α [mas/yr]	-9.489
μ_δ [mas/yr]	-1.459
l, b	88.700, 57.460

Published (Culpan et al. 2022)

class (Culpan)	He-sdO
class (SIMBAD)	sdO
T_eff [K]	48657 ± 2000
log g	5.37 ± 0.20
log y	0.52 ± 0.40
reference	2009PhDT.......273H

Fitted lines

line	λ [Å]	shift [Å]	continuum at	±avg	fitted over
H_β	4861.32	0.08	-40.0, 40.0	5.0	-45.0, 45.0
H_γ	4340.46	0.07	-40.0, 36.8	4.5	-43.0, 43.0
H_δ	4101.73	0.07	-40.0, 31.6	4.2	-43.0, 43.0
H_ε	3970.07	0.07	-28.0, 30.0	4.1	-30.0, 35.0
H_ζ	3889.05	0.06	-20.0, 26.2	4.0	-31.8, 32.0
H_η	3835.38	0.06	-20.0, 14.6	4.0	-20.7, 21.8
H_θ	3797.90	0.06	-16.0, 16.0	3.9	-15.6, 16.7
H_ι	3770.63	0.06	-13.0, 13.0	3.9	-11.7, 11.6
He II 4686	4685.70	0.08	-11.9, 11.9	4.9	-15.0, 13.8
He II 5412	5411.52	0.09	-15.0, 15.0	5.6	-15.0, 15.0
He II 4542	4541.59	0.08	-15.0, 20.0	4.7	-20.0, 20.0
He II 4200	4199.84	0.07	-23.5, 33.8	4.3	-20.0, 20.0
He I 4472	4471.60	0.07	-15.0, 15.0	4.6	-15.0, 15.0
He I 4026	4026.29	0.07	-24.2, 15.0	4.2	-15.0, 15.0
He I 4922	4921.93	0.08	-15.0, 15.0	5.1	-15.0, 15.0

Spectral energy distribution

T_eff 51056 K · log g 5.977 · E(44−55) 0.044 · χ²_r 1.09 over 10 bands

distance 6720 pc · parallax 0.1500 ± 0.1600 mas (107%) · R 0.0871 +0.1481 −0.0382 R☉ · M 0.263 +1.645 −0.181 M☉ · L 46.6 +292.1 −31.9 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.