J07309+3337

LAMOSTJ073059.10+333706.2  ·  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]38946 ± 1009
log g5.709 ± 0.095
log n(He)/n(H)-3.641 ± 0.950
reduced χ²0.994 over 636 points
radial velocity-238.0 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 18:28:30

Fit — Lei (TLUSTY)

Teff [K]35750 ± 290
log g5.800 ± 0.380
log n(He)/n(H)-2.550 ± 0.000
gridsLei et al. 2019, ApJ 881, 135
SYNSPEC 49 spectra from NLTE TLUSTY 204 model atmospheres, through XTgrid
heliumpublished as a limit

Observation

source filespec-58516-GAC114N33M1_sp14-071.fits.gz

Gaia astrometry

Gaia DR3 source893467615497884544
parallax [mas]0.5571 ± 0.1275
G17.165
μα [mas/yr]-0.017
μδ [mas/yr]-3.981
l, b185.405, 22.316

Published (Culpan et al. 2022)

class (Culpan)sdOB
Teff [K]37257 ± 345
log g5.72 ± 0.04
log y-3.20 ± 0.08
reference2021ApJS..256...28L

Fitted lines

lineλ [Å]shift [Å]continuum at±avgfitted over
Hβ4861.32-3.86-40.0, 40.05.0-45.0, 45.0
Hγ4340.46-3.45-40.0, 36.84.5-43.0, 43.0
Hδ4101.73-3.26-40.0, 31.64.2-43.0, 43.0
Hε3970.07-3.15-28.0, 30.04.1-30.0, 35.0
Hζ3889.05-3.09-20.0, 26.24.0-31.8, 32.0
Hη3835.38-3.04-20.0, 14.64.0-20.7, 21.8
Hθ3797.90-3.02-16.0, 16.03.9-15.6, 16.7
Hι3770.63-2.99-13.0, 13.03.9-11.7, 11.6
He II 46864685.70-3.72-11.9, 11.94.9-15.0, 13.8
He I 44724471.60-3.55-15.0, 15.04.6-15.0, 15.0
He I 40264026.29-3.20-24.2, 15.04.2-15.0, 15.0
He I 49224921.93-3.91-15.0, 15.05.1-15.0, 15.0