J00214+4028

LAMOSTJ002124.79+402857.1  ·  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]25986 ± 319
log g5.382 ± 0.052
log n(He)/n(H)-2.425 ± 0.090
reduced χ²0.987 over 659 points
radial velocity-168.0 km s−1
resolution (FWHM)2.50 Å
lines fitted13
gridsHE-0.041.fits
HE-0.125.fits
HE-0.300.fits
HE-0.550.fits
+9 more
fitted04/09/2026 18:25:04

Fit — Lei (TLUSTY)

Teff [K]26580 ± 520
log g5.340 ± 0.040
log n(He)/n(H)-2.410 ± 0.120
gridsLei et al. 2019, ApJ 881, 135
SYNSPEC 49 spectra from NLTE TLUSTY 204 model atmospheres, through XTgrid

Observation

source filespec-56266-M31007N41B1_sp10-033.fits.gz

Gaia astrometry

Gaia DR3 source380338531092183424
parallax [mas]0.4752 ± 0.0403
G15.495
Gabs3.947
μα [mas/yr]-3.070
μδ [mas/yr]0.638
l, b116.779, -22.030

Published (Culpan et al. 2022)

class (Culpan)sdB
Teff [K]28064 ± 375
log g5.46 ± 0.06
log y-2.55 ± 0.06
reference2021ApJS..256...28L

Fitted lines

lineλ [Å]shift [Å]continuum at±avgfitted over
Hβ4861.32-2.72-40.0, 40.05.0-45.0, 45.0
Hγ4340.46-2.43-40.0, 36.84.5-43.0, 43.0
Hδ4101.73-2.30-40.0, 31.64.2-43.0, 43.0
Hε3970.07-2.22-28.0, 30.04.1-30.0, 35.0
Hζ3889.05-2.18-20.0, 26.24.0-31.8, 32.0
Hη3835.38-2.15-20.0, 14.64.0-20.7, 21.8
Hθ3797.90-2.13-16.0, 16.03.9-15.6, 16.7
Hι3770.63-2.11-13.0, 13.03.9-11.7, 11.6
Hκ3750.15-2.10-10.0, 10.03.9-7.4, 8.7
He II 46864685.70-2.63-11.9, 11.94.9-15.0, 13.8
He I 44724471.60-2.51-15.0, 15.04.6-15.0, 15.0
He I 40264026.29-2.26-24.2, 15.04.2-15.0, 15.0
He I 49224921.93-2.76-15.0, 15.05.1-15.0, 15.0