J10143-5653sdO

10:14:21.05 -56:53:30.48 · Culpan hotsd

outside the grid χ²/N = 0.97

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]	62208 ± 539
log g	7.102 ± 0.062
log n(He)/n(H)	-2.192 ± 0.137
reduced χ²	0.966 over 745 points
radial velocity	53.0 km s⁻¹
resolution (FWHM)	2.00 Å
lines fitted	15
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 19:08:20

Observation

telescope	LCO Du Pont
survey / programme	MWM / mwm_wd
field · MJD	107984 · 60409
date	2024-04-08
catalogid	63050395850076300
exposure	1800 s in 2
airmass	1.15
seeing (50%)	1.01″
E(B−V)	0.212
pipeline	v6_2_1
S/N (classifier)	34.0
source file	spec-107984-60409-63050395850076300.fits

Gaia astrometry

Gaia DR3 source	5258974457944841344
parallax [mas]	1.3286 ± 0.0530
G	16.340
BP − RP	-0.459
G_abs	6.957
μ_α [mas/yr]	-26.819
μ_δ [mas/yr]	10.076
RUWE	1.043
l, b	282.703, -0.322
selection	f_plx

Classifier

NEW

auto: He II/He I 6.3, EW 0.95, Mg I b suggests a companion but Ca II does not (0.6 sigma)

Fitted lines

line	λ [Å]	shift [Å]	continuum at	±avg	fitted over
H_β	4861.32	0.86	-40.0, 40.0	5.0	-45.0, 45.0
H_γ	4340.46	0.77	-40.0, 36.8	4.5	-43.0, 43.0
H_δ	4101.73	0.73	-40.0, 31.6	4.2	-43.0, 43.0
H_ε	3970.07	0.70	-28.0, 30.0	4.1	-30.0, 35.0
H_ζ	3889.05	0.69	-20.0, 26.2	4.0	-31.8, 32.0
H_η	3835.38	0.68	-20.0, 14.6	4.0	-20.7, 21.8
H_θ	3797.90	0.67	-16.0, 16.0	3.9	-15.6, 16.7
H_ι	3770.63	0.67	-13.0, 13.0	3.9	-11.7, 11.6
He II 4686	4685.70	0.83	-11.9, 11.9	4.9	-15.0, 13.8
He II 5412	5411.52	0.96	-15.0, 15.0	5.6	-15.0, 15.0
He II 4542	4541.59	0.80	-15.0, 20.0	4.7	-20.0, 20.0
He II 4200	4199.84	0.74	-23.5, 33.8	4.3	-20.0, 20.0
He I 4472	4471.60	0.79	-15.0, 15.0	4.6	-15.0, 15.0
He I 4026	4026.29	0.71	-24.2, 15.0	4.2	-15.0, 15.0
He I 4922	4921.93	0.87	-15.0, 15.0	5.1	-15.0, 15.0