J02456+1325

PG0242+132  ·  Culpan knownhsd

χ²/N = 1.00

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]31198 ± 526
log g5.325 ± 0.065
log n(He)/n(H)-1.438 ± 0.089
reduced χ²0.998 over 640 points
radial velocity-99.0 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 18:26:00

Fit — Lei (TLUSTY)

Teff [K]32120 ± 130
log g5.340 ± 0.010
log n(He)/n(H)-1.530 ± 0.020
gridsLei et al. 2019, ApJ 881, 135
SYNSPEC 49 spectra from NLTE TLUSTY 204 model atmospheres, through XTgrid

Observation

source filespec-57039-EG024027N133137V01_sp08-084.fits.gz

Gaia astrometry

Gaia DR3 source31918414533148928
parallax [mas]1.4185 ± 0.0333
G13.185
Gabs3.996
μα [mas/yr]16.892
μδ [mas/yr]-8.553
l, b160.872, -40.877

Published (Culpan et al. 2022)

class (Culpan)sdB
class (SIMBAD)sdB0.5VHe10
Teff [K]32755 ± 211
log g5.40 ± 0.04
log y-1.38 ± 0.03
reference2021ApJS..256...28L

Fitted lines

lineλ [Å]shift [Å]continuum at±avgfitted over
Hβ4861.32-1.61-40.0, 40.05.0-45.0, 45.0
Hγ4340.46-1.43-40.0, 36.84.5-43.0, 43.0
Hδ4101.73-1.35-40.0, 31.64.2-43.0, 43.0
Hε3970.07-1.31-28.0, 30.04.1-30.0, 35.0
Hζ3889.05-1.28-20.0, 26.24.0-31.8, 32.0
Hη3835.38-1.27-20.0, 14.64.0-20.7, 21.8
Hθ3797.90-1.25-16.0, 16.03.9-15.6, 16.7
Hι3770.63-1.25-13.0, 13.03.9-11.7, 11.6
He II 46864685.70-1.55-11.9, 11.94.9-15.0, 13.8
He I 44724471.60-1.48-15.0, 15.04.6-15.0, 15.0
He I 40264026.29-1.33-24.2, 15.04.2-15.0, 15.0
He I 49224921.93-1.63-15.0, 15.05.1-15.0, 15.0