J13004+0045

PG1257+010  ·  Culpan knownhsd

χ²/N = 0.96

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]42590 ± 917
log g5.779 ± 0.121
log n(He)/n(H)-1.039 ± 0.119
reduced χ²0.957 over 638 points
radial velocity-166.0 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 18:30:50

Fit — Lei (TLUSTY)

Teff [K]37940 ± 730
log g6.020 ± 0.140
log n(He)/n(H)-1.420 ± 0.090
gridsLei et al. 2020, ApJ 889, 117
SYNSPEC 49 spectra from NLTE TLUSTY 204 model atmospheres, through XTgrid

Observation

source filespec-56395-HD130444N001742F01_sp03-116.fits.gz

Gaia astrometry

Gaia DR3 source3689536684343245312
parallax [mas]0.6204 ± 0.0388
G15.695
Gabs4.782
μα [mas/yr]2.011
μδ [mas/yr]-20.569
l, b307.980, 63.542

Published (Culpan et al. 2022)

class (Culpan)sdOB+MS
class (SIMBAD)sdB+?
Teff [K]40203 ± 391
log g5.60 ± 0.05
log y-1.34 ± 0.06
reference2021ApJS..256...28L

Fitted lines

lineλ [Å]shift [Å]continuum at±avgfitted over
Hβ4861.32-2.69-40.0, 40.05.0-45.0, 45.0
Hγ4340.46-2.40-40.0, 36.84.5-43.0, 43.0
Hδ4101.73-2.27-40.0, 31.64.2-43.0, 43.0
Hε3970.07-2.20-28.0, 30.04.1-30.0, 35.0
Hζ3889.05-2.15-20.0, 26.24.0-31.8, 32.0
Hη3835.38-2.12-20.0, 14.64.0-20.7, 21.8
Hθ3797.90-2.10-16.0, 16.03.9-15.6, 16.7
Hι3770.63-2.09-13.0, 13.03.9-11.7, 11.6
He II 46864685.70-2.59-11.9, 11.94.9-15.0, 13.8
He I 44724471.60-2.48-15.0, 15.04.6-15.0, 15.0
He I 40264026.29-2.23-24.2, 15.04.2-15.0, 15.0
He I 49224921.93-2.73-15.0, 15.05.1-15.0, 15.0