J05443+3817

LAMOSTJ054423.26+381750.0  ·  Culpan knownhsd

χ²/N = 0.97

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]28029 ± 673
log g5.368 ± 0.109
log n(He)/n(H)-2.836 ± 0.273
reduced χ²0.969 over 636 points
radial velocity-113.0 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 18:27:02

Fit — Lei (TLUSTY)

Teff [K]28200 ± 380
log g5.160 ± 0.060
log n(He)/n(H)-2.840 ± 0.240
gridsLei et al. 2019, ApJ 881, 135
SYNSPEC 49 spectra from NLTE TLUSTY 204 model atmospheres, through XTgrid

Observation

cosmic rays4 pixels cancelled
source filespec-57329-GAC089N38B1_sp14-035.fits.gz

Gaia astrometry

Gaia DR3 source189831438452843008
parallax [mas]0.5504 ± 0.0446
G16.033
Gabs4.862
μα [mas/yr]2.122
μδ [mas/yr]-6.212
l, b171.865, 4.655

Published (Culpan et al. 2022)

class (Culpan)sdB
Teff [K]30797 ± 345
log g5.71 ± 0.07
log y-3.01 ± 0.14
reference2021ApJS..256...28L

Fitted lines

lineλ [Å]shift [Å]continuum at±avgfitted over
Hβ4861.32-1.83-40.0, 40.05.0-45.0, 45.0
Hγ4340.46-1.64-40.0, 36.84.5-43.0, 43.0
Hδ4101.73-1.55-40.0, 31.64.2-43.0, 43.0
Hε3970.07-1.50-28.0, 30.04.1-30.0, 35.0
Hζ3889.05-1.47-20.0, 26.24.0-31.8, 32.0
Hη3835.38-1.45-20.0, 14.64.0-20.7, 21.8
Hθ3797.90-1.43-16.0, 16.03.9-15.6, 16.7
Hι3770.63-1.42-13.0, 13.03.9-11.7, 11.6
He II 46864685.70-1.77-11.9, 11.94.9-15.0, 13.8
He I 44724471.60-1.69-15.0, 15.04.6-15.0, 15.0
He I 40264026.29-1.52-24.2, 15.04.2-15.0, 15.0
He I 49224921.93-1.86-15.0, 15.05.1-15.0, 15.0