J13381+4317

SDSSJ133810.31+431743.1  ·  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.

Results and provenance

Fit — Bamberg

Teff [K]36345 ± 754
log g5.564 ± 0.112
log n(He)/n(H)-1.180 ± 0.107
reduced χ²0.972 over 639 points
radial velocity-55.0 km s−1
resolution (FWHM)2.50 Å
lines fitted12
gridsHE-0.041.fits
HE-0.125.fits
HE-0.300.fits
HE-0.550.fits
+9 more
fitted04/09/2026 18:31:02

Fit — Lei (TLUSTY)

Teff [K]34600 ± 560
log g5.190 ± 0.060
log n(He)/n(H)-1.120 ± 0.150
gridsLei et al. 2020, ApJ 889, 117
SYNSPEC 49 spectra from NLTE TLUSTY 204 model atmospheres, through XTgrid

Observation

source filespec-57478-HD133738N421203M01_sp15-138.fits.gz

Gaia astrometry

Gaia DR3 source1501713500909166208
parallax [mas]0.1646 ± 0.0508
G16.750
μα [mas/yr]-13.549
μδ [mas/yr]-0.655
l, b95.612, 71.268

Published (Culpan et al. 2022)

class (Culpan)He-sdOB
class (SIMBAD)sdO
Teff [K]36756 ± 2000
log g5.22 ± 0.20
log y-0.97 ± 0.40
reference2009PhDT.......273H

Fitted lines

lineλ [Å]shift [Å]continuum at±avgfitted over
Hβ4861.32-0.89-40.0, 40.05.0-45.0, 45.0
Hγ4340.46-0.80-40.0, 36.84.5-43.0, 43.0
Hδ4101.73-0.75-40.0, 31.64.2-43.0, 43.0
Hε3970.07-0.73-28.0, 30.04.1-30.0, 35.0
Hζ3889.05-0.71-20.0, 26.24.0-31.8, 32.0
Hη3835.38-0.70-20.0, 14.64.0-20.7, 21.8
Hθ3797.90-0.70-16.0, 16.03.9-15.6, 16.7
Hι3770.63-0.69-13.0, 13.03.9-11.7, 11.6
He II 46864685.70-0.86-11.9, 11.94.9-15.0, 13.8
He I 44724471.60-0.82-15.0, 15.04.6-15.0, 15.0
He I 40264026.29-0.74-24.2, 15.04.2-15.0, 15.0
He I 49224921.93-0.90-15.0, 15.05.1-15.0, 15.0