J04043+3724

LAMOSTJ040422.55+372432.2  ·  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]35445 ± 316
log g6.014 ± 0.048
log n(He)/n(H)-1.569 ± 0.059
reduced χ²0.978 over 639 points
radial velocity-74.0 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 18:26:32

Fit — Lei (TLUSTY)

Teff [K]34470 ± 290
log g5.720 ± 0.100
log n(He)/n(H)-1.430 ± 0.090
gridsLei et al. 2018, ApJ 868, 70
SYNSPEC 49 spectra from NLTE TLUSTY 204 model atmospheres, through XTgrid

Observation

cosmic rays13 pixels cancelled
source filespec-57725-GAC059N38M1_sp07-109.fits.gz

Gaia astrometry

Gaia DR3 source225573267233289600
parallax [mas]0.9223 ± 0.0570
G16.174
Gabs6.068
μα [mas/yr]-1.936
μδ [mas/yr]-7.105
l, b160.083, -11.179

Published (Culpan et al. 2022)

class (Culpan)sdOB
Teff [K]35210 ± 180
log g6.03 ± 0.03
log y-1.84 ± 0.03
reference2021ApJS..256...28L

Fitted lines

lineλ [Å]shift [Å]continuum at±avgfitted over
Hβ4861.32-1.20-40.0, 40.05.0-45.0, 45.0
Hγ4340.46-1.07-40.0, 36.84.5-43.0, 43.0
Hδ4101.73-1.01-40.0, 31.64.2-43.0, 43.0
Hε3970.07-0.98-28.0, 30.04.1-30.0, 35.0
Hζ3889.05-0.96-20.0, 26.24.0-31.8, 32.0
Hη3835.38-0.95-20.0, 14.64.0-20.7, 21.8
Hθ3797.90-0.94-16.0, 16.03.9-15.6, 16.7
Hι3770.63-0.93-13.0, 13.03.9-11.7, 11.6
He II 46864685.70-1.16-11.9, 11.94.9-15.0, 13.8
He I 44724471.60-1.10-15.0, 15.04.6-15.0, 15.0
He I 40264026.29-0.99-24.2, 15.04.2-15.0, 15.0
He I 49224921.93-1.21-15.0, 15.05.1-15.0, 15.0