J21083+0101

SDSSJ210823.60+010155.3 · 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

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

Results and provenance

Fit — Bamberg

T_eff [K]	25330 ± 703
log g	5.330 ± 0.106
log n(He)/n(H)	-2.842 ± 0.330
reduced χ²	0.989 over 659 points
radial velocity	-168.0 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
fitted	04/09/2026 18:33:21

Fit — Lei (TLUSTY)

T_eff [K]	25480 ± 500
log g	5.330 ± 0.040
log n(He)/n(H)	-2.500 ± 0.060
grids	Lei et al. 2019, ApJ 881, 135 SYNSPEC 49 spectra from NLTE TLUSTY 204 model atmospheres, through XTgrid

Observation

cosmic rays	36 pixels cancelled
source file	spec-58016-GACII315N01M1_sp06-248.fits.gz

Gaia astrometry

Gaia DR3 source	2690647825256267264
parallax [mas]	0.5579 ± 0.0639
G	15.967
G_abs	4.775
μ_α [mas/yr]	-10.419
μ_δ [mas/yr]	-3.877
l, b	51.181, -29.502

Published (Culpan et al. 2022)

class (Culpan)	sdB
class (SIMBAD)	sdB2He6
T_eff [K]	23398 ± 1339
log g	5.01 ± 0.18
log y	-2.30 ± 0.20
reference	2017OAst...26..164G

Fitted lines

line	λ [Å]	shift [Å]	continuum at	±avg	fitted over
H_β	4861.32	-2.72	-40.0, 40.0	5.0	-45.0, 45.0
H_γ	4340.46	-2.43	-40.0, 36.8	4.5	-43.0, 43.0
H_δ	4101.73	-2.30	-40.0, 31.6	4.2	-43.0, 43.0
H_ε	3970.07	-2.22	-28.0, 30.0	4.1	-30.0, 35.0
H_ζ	3889.05	-2.18	-20.0, 26.2	4.0	-31.8, 32.0
H_η	3835.38	-2.15	-20.0, 14.6	4.0	-20.7, 21.8
H_θ	3797.90	-2.13	-16.0, 16.0	3.9	-15.6, 16.7
H_ι	3770.63	-2.11	-13.0, 13.0	3.9	-11.7, 11.6
H_κ	3750.15	-2.10	-10.0, 10.0	3.9	-7.4, 8.7
He II 4686	4685.70	-2.63	-11.9, 11.9	4.9	-15.0, 13.8
He I 4472	4471.60	-2.51	-15.0, 15.0	4.6	-15.0, 15.0
He I 4026	4026.29	-2.26	-24.2, 15.0	4.2	-15.0, 15.0
He I 4922	4921.93	-2.76	-15.0, 15.0	5.1	-15.0, 15.0