J03387+4134

LAMOSTJ033847.06+413424.2 · Culpan knownhsd

outside the grid 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

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

Results and provenance

Fit — Bamberg

T_eff [K]	22484 ± 327
log g	5.871 ± 0.037
log n(He)/n(H)	-5.654 ± 1.654 upper limit
reduced χ²	0.987 over 661 points
radial velocity	38.0 km s⁻¹
resolution (FWHM)	2.50 Å
lines fitted	13
grids	HE-0.041.fits HE-0.125.fits HE-0.300.fits HE-0.550.fits +9 more
settled	outside the grid
fitted	04/09/2026 18:26:16

Fit — Lei (TLUSTY)

T_eff [K]	22240 ± 320
log g	5.760 ± 0.030
log n(He)/n(H)	-3.000 ± 0.000
grids	Lei et al. 2018, ApJ 868, 70 SYNSPEC 49 spectra from NLTE TLUSTY 204 model atmospheres, through XTgrid
helium	published as a limit

Observation

cosmic rays	6 pixels cancelled
source file	spec-57035-GAC054N40B1_sp15-043.fits.gz

Gaia astrometry

Gaia DR3 source	237133566847520000
parallax [mas]	1.6469 ± 0.0318
G	15.089
G_abs	6.213
μ_α [mas/yr]	-5.423
μ_δ [mas/yr]	-5.790
l, b	153.503, -11.156

Published (Culpan et al. 2022)

class (Culpan)	sdB
T_eff [K]	24806 ± 123
log g	6.06 ± 0.02
log y	-4.28 ± 0.58
reference	2021ApJS..256...28L

Fitted lines

line	λ [Å]	shift [Å]	continuum at	±avg	fitted over
H_β	4861.32	0.62	-40.0, 40.0	5.0	-45.0, 45.0
H_γ	4340.46	0.55	-40.0, 36.8	4.5	-43.0, 43.0
H_δ	4101.73	0.52	-40.0, 31.6	4.2	-43.0, 43.0
H_ε	3970.07	0.50	-28.0, 30.0	4.1	-30.0, 35.0
H_ζ	3889.05	0.49	-20.0, 26.2	4.0	-31.8, 32.0
H_η	3835.38	0.49	-20.0, 14.6	4.0	-20.7, 21.8
H_θ	3797.90	0.48	-16.0, 16.0	3.9	-15.6, 16.7
H_ι	3770.63	0.48	-13.0, 13.0	3.9	-11.7, 11.6
H_κ	3750.15	0.48	-10.0, 10.0	3.9	-7.4, 8.7
He II 4686	4685.70	0.59	-11.9, 11.9	4.9	-15.0, 13.8
He I 4472	4471.60	0.57	-15.0, 15.0	4.6	-15.0, 15.0
He I 4026	4026.29	0.51	-24.2, 15.0	4.2	-15.0, 15.0
He I 4922	4921.93	0.62	-15.0, 15.0	5.1	-15.0, 15.0