J16290+4113sdO

SDSSJ162905.88+411356.7 · 16:29:05.88 41:13:56.82 · Culpan knownhsd

outside the grid 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]	59136 ± 1636
log g	5.904 ± 0.138
log n(He)/n(H)	-2.027 ± 0.198
reduced χ²	0.983 over 745 points
radial velocity	46.0 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
settled	outside the grid
fitted	04/09/2026 19:09:42

Observation

telescope	SDSS 2.5-M
survey / programme	boss
date	2012-05-25
exposure	3603 s in 8
pipeline	v5_13_2
S/N (classifier)	26.3
source file	spec-6045-56072-0876.fits

Gaia astrometry

Gaia DR3 source	1333024739052716928
parallax [mas]	0.2718 ± 0.1567
G	18.732
μ_α [mas/yr]	-3.351
μ_δ [mas/yr]	-3.125
l, b	65.260, 43.632

Published (Culpan et al. 2022)

class (Culpan)	sdO
class (SIMBAD)	DAO/sdO

Classifier

AGREES

auto: He II/He I 7.1, EW 1.06, red end too noisy for Ca II (S/N 8) -- a companion is neither seen nor excluded

Fitted lines

line	λ [Å]	shift [Å]	continuum at	±avg	fitted over
H_β	4861.32	0.75	-40.0, 40.0	5.0	-45.0, 45.0
H_γ	4340.46	0.67	-40.0, 36.8	4.5	-43.0, 43.0
H_δ	4101.73	0.63	-40.0, 31.6	4.2	-43.0, 43.0
H_ε	3970.07	0.61	-28.0, 30.0	4.1	-30.0, 35.0
H_ζ	3889.05	0.60	-20.0, 26.2	4.0	-31.8, 32.0
H_η	3835.38	0.59	-20.0, 14.6	4.0	-20.7, 21.8
H_θ	3797.90	0.58	-16.0, 16.0	3.9	-15.6, 16.7
H_ι	3770.63	0.58	-13.0, 13.0	3.9	-11.7, 11.6
He II 4686	4685.70	0.72	-11.9, 11.9	4.9	-15.0, 13.8
He II 5412	5411.52	0.83	-15.0, 15.0	5.6	-15.0, 15.0
He II 4542	4541.59	0.70	-15.0, 20.0	4.7	-20.0, 20.0
He II 4200	4199.84	0.64	-23.5, 33.8	4.3	-20.0, 20.0
He I 4472	4471.60	0.69	-15.0, 15.0	4.6	-15.0, 15.0
He I 4026	4026.29	0.62	-24.2, 15.0	4.2	-15.0, 15.0
He I 4922	4921.93	0.76	-15.0, 15.0	5.1	-15.0, 15.0