J14546+1937

PG1452+198  ·  Culpan knownhsd

χ²/N = 0.99

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]29628 ± 143
log g5.832 ± 0.023
log n(He)/n(H)-2.183 ± 0.047
reduced χ²0.989 over 636 points
radial velocity20.0 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 18:31:31

Fit — Lei (TLUSTY)

Teff [K]31000 ± 140
log g5.880 ± 0.020
log n(He)/n(H)-2.370 ± 0.030
gridsLei et al. 2018, ApJ 868, 70
SYNSPEC 49 spectra from NLTE TLUSTY 204 model atmospheres, through XTgrid

Observation

cosmic rays4 pixels cancelled
source filespec-59263-HD145323N181407V02_sp09-082.fits.gz

Gaia astrometry

Gaia DR3 source1237226700401153792
parallax [mas]2.9513 ± 0.0466
G12.431
Gabs4.806
μα [mas/yr]-0.530
μδ [mas/yr]-18.981
l, b24.662, 60.825

Published (Culpan et al. 2022)

class (Culpan)sdB+WD
class (SIMBAD)sdB0.5VIIIHe7
Teff [K]31177 ± 70
log g5.82 ± 0.02
log y-2.28 ± 0.03
reference2021ApJS..256...28L

Fitted lines

lineλ [Å]shift [Å]continuum at±avgfitted over
Hβ4861.320.32-40.0, 40.05.0-45.0, 45.0
Hγ4340.460.29-40.0, 36.84.5-43.0, 43.0
Hδ4101.730.27-40.0, 31.64.2-43.0, 43.0
Hε3970.070.26-28.0, 30.04.1-30.0, 35.0
Hζ3889.050.26-20.0, 26.24.0-31.8, 32.0
Hη3835.380.26-20.0, 14.64.0-20.7, 21.8
Hθ3797.900.25-16.0, 16.03.9-15.6, 16.7
Hι3770.630.25-13.0, 13.03.9-11.7, 11.6
He II 46864685.700.31-11.9, 11.94.9-15.0, 13.8
He I 44724471.600.30-15.0, 15.04.6-15.0, 15.0
He I 40264026.290.27-24.2, 15.04.2-15.0, 15.0
He I 49224921.930.33-15.0, 15.05.1-15.0, 15.0