J19030+3445

LAMOSTJ190301.13+344529.0  ·  Culpan knownhsd

χ²/N = 1.00

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]26831 ± 203
log g5.498 ± 0.031
log n(He)/n(H)-2.957 ± 0.100
reduced χ²0.997 over 639 points
radial velocity-38.0 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 18:32:59

Fit — Lei (TLUSTY)

Teff [K]28440 ± 190
log g5.450 ± 0.020
log n(He)/n(H)-2.970 ± 0.050
gridsLei et al. 2018, ApJ 868, 70
SYNSPEC 49 spectra from NLTE TLUSTY 204 model atmospheres, through XTgrid

Observation

source filespec-57898-HD185707N345119B01_sp08-088.fits.gz

Gaia astrometry

Gaia DR3 source2092525388221505792
parallax [mas]0.4966 ± 0.0355
G15.677
Gabs4.183
μα [mas/yr]-7.916
μδ [mas/yr]-8.568
l, b65.610, 12.887

Published (Culpan et al. 2022)

class (Culpan)sdB
Teff [K]28955 ± 185
log g5.58 ± 0.02
log y-3.07 ± 0.02
reference2021ApJS..256...28L

Fitted lines

lineλ [Å]shift [Å]continuum at±avgfitted over
Hβ4861.32-0.62-40.0, 40.05.0-45.0, 45.0
Hγ4340.46-0.55-40.0, 36.84.5-43.0, 43.0
Hδ4101.73-0.52-40.0, 31.64.2-43.0, 43.0
Hε3970.07-0.50-28.0, 30.04.1-30.0, 35.0
Hζ3889.05-0.49-20.0, 26.24.0-31.8, 32.0
Hη3835.38-0.49-20.0, 14.64.0-20.7, 21.8
Hθ3797.90-0.48-16.0, 16.03.9-15.6, 16.7
Hι3770.63-0.48-13.0, 13.03.9-11.7, 11.6
He II 46864685.70-0.59-11.9, 11.94.9-15.0, 13.8
He I 44724471.60-0.57-15.0, 15.04.6-15.0, 15.0
He I 40264026.29-0.51-24.2, 15.04.2-15.0, 15.0
He I 49224921.93-0.62-15.0, 15.05.1-15.0, 15.0