J15004+4205

PG1458+423  ·  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]29834 ± 125
log g5.572 ± 0.017
log n(He)/n(H)-3.827 ± 0.313
reduced χ²0.983 over 641 points
radial velocity5.0 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 18:31:34

Fit — Lei (TLUSTY)

Teff [K]31000 ± 130
log g5.590 ± 0.030
log n(He)/n(H)-3.000 ± 0.000
gridsLei et al. 2018, ApJ 868, 70
SYNSPEC 49 spectra from NLTE TLUSTY 204 model atmospheres, through XTgrid
heliumpublished as a limit

Observation

source filespec-57918-HD150100N400503B01_sp11-192.fits.gz

Gaia astrometry

Gaia DR3 source1585277243613047936
parallax [mas]1.1165 ± 0.0304
G13.861
Gabs4.121
μα [mas/yr]-15.876
μδ [mas/yr]-14.125
l, b71.035, 59.796

Published (Culpan et al. 2022)

class (Culpan)sdB
class (SIMBAD)sdB1.5VIIHe0
Teff [K]30265 ± 147
log g5.39 ± 0.03
log y-4.29 ± 0.32
reference2021ApJS..256...28L

Fitted lines

lineλ [Å]shift [Å]continuum at±avgfitted over
Hβ4861.320.08-40.0, 40.05.0-45.0, 45.0
Hγ4340.460.07-40.0, 36.84.5-43.0, 43.0
Hδ4101.730.07-40.0, 31.64.2-43.0, 43.0
Hε3970.070.07-28.0, 30.04.1-30.0, 35.0
Hζ3889.050.06-20.0, 26.24.0-31.8, 32.0
Hη3835.380.06-20.0, 14.64.0-20.7, 21.8
Hθ3797.900.06-16.0, 16.03.9-15.6, 16.7
Hι3770.630.06-13.0, 13.03.9-11.7, 11.6
He II 46864685.700.08-11.9, 11.94.9-15.0, 13.8
He I 44724471.600.07-15.0, 15.04.6-15.0, 15.0
He I 40264026.290.07-24.2, 15.04.2-15.0, 15.0
He I 49224921.930.08-15.0, 15.05.1-15.0, 15.0