J08590+0233sdOB

SDSSJ085900.32+023313.1  ·  08:59:00.34 02:33:13.14  ·  Culpan knownhsd

χ²/N = 0.97

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

profile fit on the Bamberg grid
Observed spectrum in black, model in red, offset by line. Balmer series left, helium right.

Line-profile fit — uli

profile fit on the uli grid
Observed spectrum in black, model in red, offset by line. Balmer series left, helium right.

Results and provenance

Fit — Bamberg

Teff [K]34084 ± 209
log g5.930 ± 0.028
log n(He)/n(H)-1.794 ± 0.041
reduced χ²0.975 over 639 points
radial velocity-122.0 km s−1
resolution (FWHM)2.00 Å
lines fitted12
gridsHE-0.041.fits
HE-0.125.fits
HE-0.300.fits
HE-0.550.fits
+9 more
fitted04/09/2026 19:08:04

Fit — uli

Teff [K]32592 ± 514
log g5.871 ± 0.032
log n(He)/n(H)-1.772 ± 0.042
reduced χ²0.979 over 639 points
radial velocity-122.0 km s−1
resolution (FWHM)2.00 Å
lines fitted12
gridsh667.grid
h909.grid
h97.grid
h99.grid
+1 more
fitted04/09/2026 18:35:07

Observation

telescopeSDSS 2.5-M
survey / programmeboss
date2010-03-17
exposure9008 s in 20
pipelinev5_13_2
S/N (classifier)74.4
source filespec-3816-55272-0760.fits

Gaia astrometry

Gaia DR3 source577792849295295488
parallax [mas]0.4276 ± 0.0580
G16.261
Gabs4.447
μα [mas/yr]2.583
μδ [mas/yr]-3.216
l, b226.264, 29.344

Published (Culpan et al. 2022)

class (Culpan)sdOB
class (SIMBAD)sdO
Teff [K]33882 ± 917
log g5.67 ± 0.13
log y-1.70 ± 0.20
reference2017OAst...26..164G

Classifier

AGREES

fitted Teff 33882 logg 5.67 logY -1.7 2017OAst...26..164G

auto: He II 0.25 (2.8 sigma), Mg I b suggests a companion but Ca II does not (-1.0 sigma)

Fitted lines

lineλ [Å]shift [Å]continuum at±avgfitted over
Hβ4861.32-1.98-40.0, 40.05.0-45.0, 45.0
Hγ4340.46-1.77-40.0, 36.84.5-43.0, 43.0
Hδ4101.73-1.67-40.0, 31.64.2-43.0, 43.0
Hε3970.07-1.62-28.0, 30.04.1-30.0, 35.0
Hζ3889.05-1.58-20.0, 26.24.0-31.8, 32.0
Hη3835.38-1.56-20.0, 14.64.0-20.7, 21.8
Hθ3797.90-1.55-16.0, 16.03.9-15.6, 16.7
Hι3770.63-1.53-13.0, 13.03.9-11.7, 11.6
He II 46864685.70-1.91-11.9, 11.94.9-15.0, 13.8
He I 44724471.60-1.82-15.0, 15.04.6-15.0, 15.0
He I 40264026.29-1.64-24.2, 15.04.2-15.0, 15.0
He I 49224921.93-2.00-15.0, 15.05.1-15.0, 15.0

Spectral energy distribution

Teff 34084 K · log g 5.930 · E(44−55) 0.038 · χ²r 0.50 over 40 bands

distance 2339 pc · parallax 0.4300 ± 0.0600 mas (14%) · R 0.1528 +0.0241 −0.0182 R☉ · M 0.727 +0.270 −0.179 M☉ — above the 0.47 canonical mass · L 28.4 +9.7 −6.4 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.