J07379+3116

LAMOSTJ073756.25+311646.5  ·  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]27322 ± 241
log g5.439 ± 0.038
log n(He)/n(H)-2.534 ± 0.051
reduced χ²0.990 over 659 points
radial velocity13.0 km s−1
resolution (FWHM)2.50 Å
lines fitted13
gridsHE-0.041.fits
HE-0.125.fits
HE-0.300.fits
HE-0.550.fits
+9 more
fitted04/09/2026 18:28:39

Fit — Lei (TLUSTY)

Teff [K]31000 ± 290
log g5.490 ± 0.050
log n(He)/n(H)-2.420 ± 0.090
gridsLei et al. 2018, ApJ 868, 70
SYNSPEC 49 spectra from NLTE TLUSTY 204 model atmospheres, through XTgrid

Observation

source filespec-58200-HD074219N301004V01_sp15-169.fits.gz

Gaia astrometry

Gaia DR3 source880252005422941440
parallax [mas]1.2889 ± 0.0335
G13.554
Gabs4.156
μα [mas/yr]-1.323
μδ [mas/yr]-21.322
l, b188.315, 22.956

Published (Culpan et al. 2022)

class (Culpan)sdB
Teff [K]31036 ± 210
log g5.41 ± 0.04
log y-2.53 ± 0.04
reference2021ApJS..256...28L

Fitted lines

lineλ [Å]shift [Å]continuum at±avgfitted over
Hβ4861.320.21-40.0, 40.05.0-45.0, 45.0
Hγ4340.460.19-40.0, 36.84.5-43.0, 43.0
Hδ4101.730.18-40.0, 31.64.2-43.0, 43.0
Hε3970.070.17-28.0, 30.04.1-30.0, 35.0
Hζ3889.050.17-20.0, 26.24.0-31.8, 32.0
Hη3835.380.17-20.0, 14.64.0-20.7, 21.8
Hθ3797.900.16-16.0, 16.03.9-15.6, 16.7
Hι3770.630.16-13.0, 13.03.9-11.7, 11.6
Hκ3750.150.16-10.0, 10.03.9-7.4, 8.7
He II 46864685.700.20-11.9, 11.94.9-15.0, 13.8
He I 44724471.600.19-15.0, 15.04.6-15.0, 15.0
He I 40264026.290.17-24.2, 15.04.2-15.0, 15.0
He I 49224921.930.21-15.0, 15.05.1-15.0, 15.0