J07426+1310

LAMOSTJ074236.84+131030.6 · 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

Observed spectrum in black, model in red, offset by line. Balmer series left, helium right.

Results and provenance

Fit — Bamberg

T_eff [K]	27107 ± 562
log g	5.367 ± 0.095
log n(He)/n(H)	-2.950 ± 0.278
reduced χ²	1.000 over 639 points
radial velocity	-124.0 km s⁻¹
resolution (FWHM)	2.50 Å
lines fitted	12
grids	HE-0.041.fits HE-0.125.fits HE-0.300.fits HE-0.550.fits +9 more
fitted	04/09/2026 18:28:43

Fit — Lei (TLUSTY)

T_eff [K]	28330 ± 410
log g	5.270 ± 0.040
log n(He)/n(H)	-2.720 ± 0.170
grids	Lei et al. 2019, ApJ 881, 135 SYNSPEC 49 spectra from NLTE TLUSTY 204 model atmospheres, through XTgrid

Observation

source file

spec-57402-GAC116N12M1_sp04-024.fits.gz

Gaia astrometry

Gaia DR3 source	3163997712841285504
parallax [mas]	-0.0447 ± 0.0989
G	17.515
μ_α [mas/yr]	-1.391
μ_δ [mas/yr]	-1.668
l, b	206.649, 17.207

Published (Culpan et al. 2022)

class (Culpan)	sdB
T_eff [K]	29710 ± 308
log g	5.58 ± 0.06
log y	-2.91 ± 0.08
reference	2021ApJS..256...28L

Fitted lines

line	λ [Å]	shift [Å]	continuum at	±avg	fitted over
H_β	4861.32	-2.01	-40.0, 40.0	5.0	-45.0, 45.0
H_γ	4340.46	-1.80	-40.0, 36.8	4.5	-43.0, 43.0
H_δ	4101.73	-1.70	-40.0, 31.6	4.2	-43.0, 43.0
H_ε	3970.07	-1.64	-28.0, 30.0	4.1	-30.0, 35.0
H_ζ	3889.05	-1.61	-20.0, 26.2	4.0	-31.8, 32.0
H_η	3835.38	-1.59	-20.0, 14.6	4.0	-20.7, 21.8
H_θ	3797.90	-1.57	-16.0, 16.0	3.9	-15.6, 16.7
H_ι	3770.63	-1.56	-13.0, 13.0	3.9	-11.7, 11.6
He II 4686	4685.70	-1.94	-11.9, 11.9	4.9	-15.0, 13.8
He I 4472	4471.60	-1.85	-15.0, 15.0	4.6	-15.0, 15.0
He I 4026	4026.29	-1.67	-24.2, 15.0	4.2	-15.0, 15.0
He I 4922	4921.93	-2.04	-15.0, 15.0	5.1	-15.0, 15.0