J13026+2740

PG1300+278  ·  Culpan knownhsd

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

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]28090 ± 212
log g5.386 ± 0.035
log n(He)/n(H)-2.805 ± 0.108
reduced χ²0.977 over 639 points
radial velocity-39.0 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 18:30:51

Fit — Lei (TLUSTY)

Teff [K]38220 ± 8090
log g6.740 ± 0.820
log n(He)/n(H)-2.070 ± 0.000
gridsLei et al. 2018, ApJ 868, 70
SYNSPEC 49 spectra from NLTE TLUSTY 204 model atmospheres, through XTgrid

Observation

cosmic rays9 pixels cancelled
source filespec-59227-HD125932N280356B02_sp08-240.fits.gz

Gaia astrometry

Gaia DR3 source1460730407575030656
parallax [mas]0.8636 ± 0.0435
G14.198
Gabs3.922
μα [mas/yr]-5.712
μδ [mas/yr]-5.477
l, b45.993, 87.442

Published (Culpan et al. 2022)

class (Culpan)sdB+WD
class (SIMBAD)sdO6.5VIIpHe35
Teff [K]29600 ± 1000
log g5.65 ± 0.15
log y-2.30 ± 0.10
reference2001MNRAS.326.1391M

Fitted lines

lineλ [Å]shift [Å]continuum at±avgfitted over
Hβ4861.32-0.63-40.0, 40.05.0-45.0, 45.0
Hγ4340.46-0.56-40.0, 36.84.5-43.0, 43.0
Hδ4101.73-0.53-40.0, 31.64.2-43.0, 43.0
Hε3970.07-0.52-28.0, 30.04.1-30.0, 35.0
Hζ3889.05-0.51-20.0, 26.24.0-31.8, 32.0
Hη3835.38-0.50-20.0, 14.64.0-20.7, 21.8
Hθ3797.90-0.49-16.0, 16.03.9-15.6, 16.7
Hι3770.63-0.49-13.0, 13.03.9-11.7, 11.6
He II 46864685.70-0.61-11.9, 11.94.9-15.0, 13.8
He I 44724471.60-0.58-15.0, 15.04.6-15.0, 15.0
He I 40264026.29-0.52-24.2, 15.04.2-15.0, 15.0
He I 49224921.93-0.64-15.0, 15.05.1-15.0, 15.0