J21383+3421

LAMOSTJ213818.52+342105.6  ·  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]28808 ± 274
log g5.442 ± 0.042
log n(He)/n(H)-1.811 ± 0.052
reduced χ²0.987 over 639 points
radial velocity-71.0 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 18:33:38

Fit — Lei (TLUSTY)

Teff [K]30340 ± 180
log g5.410 ± 0.030
log n(He)/n(H)-1.820 ± 0.050
gridsLei et al. 2018, ApJ 868, 70
SYNSPEC 49 spectra from NLTE TLUSTY 204 model atmospheres, through XTgrid

Observation

cosmic rays3 pixels cancelled
source filespec-57690-HD213633N331403B01_sp09-107.fits.gz

Gaia astrometry

Gaia DR3 source1950263255195349888
parallax [mas]0.9412 ± 0.0259
G14.730
Gabs4.641
μα [mas/yr]-10.756
μδ [mas/yr]-6.966
l, b83.625, -13.395

Published (Culpan et al. 2022)

class (Culpan)sdB
Teff [K]30844 ± 296
log g5.33 ± 0.04
log y-1.89 ± 0.03
reference2021ApJS..256...28L

Fitted lines

lineλ [Å]shift [Å]continuum at±avgfitted over
Hβ4861.32-1.15-40.0, 40.05.0-45.0, 45.0
Hγ4340.46-1.03-40.0, 36.84.5-43.0, 43.0
Hδ4101.73-0.97-40.0, 31.64.2-43.0, 43.0
Hε3970.07-0.94-28.0, 30.04.1-30.0, 35.0
Hζ3889.05-0.92-20.0, 26.24.0-31.8, 32.0
Hη3835.38-0.91-20.0, 14.64.0-20.7, 21.8
Hθ3797.90-0.90-16.0, 16.03.9-15.6, 16.7
Hι3770.63-0.89-13.0, 13.03.9-11.7, 11.6
He II 46864685.70-1.11-11.9, 11.94.9-15.0, 13.8
He I 44724471.60-1.06-15.0, 15.04.6-15.0, 15.0
He I 40264026.29-0.95-24.2, 15.04.2-15.0, 15.0
He I 49224921.93-1.17-15.0, 15.05.1-15.0, 15.0