J21388+2316

Culpan hotsd

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]	45194 ± 778
log g	6.241 ± 0.085
log n(He)/n(H)	-1.774 ± 0.109
reduced χ²	0.999 over 745 points
radial velocity	29.0 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
fitted	04/09/2026 19:10:45

Observation

source file

spec-102476-60592-63050394863520041.fits

Gaia astrometry

Gaia DR3 source	1797122038722776448
parallax [mas]	0.5971 ± 0.0463
G	15.726
BP − RP	-0.377
G_abs	4.607
μ_α [mas/yr]	6.172
μ_δ [mas/yr]	-6.049
RUWE	0.981
l, b	75.622, -21.434
selection	f_plx

Fitted lines

line	λ [Å]	shift [Å]	continuum at	±avg	fitted over
H_β	4861.32	0.47	-40.0, 40.0	5.0	-45.0, 45.0
H_γ	4340.46	0.42	-40.0, 36.8	4.5	-43.0, 43.0
H_δ	4101.73	0.40	-40.0, 31.6	4.2	-43.0, 43.0
H_ε	3970.07	0.38	-28.0, 30.0	4.1	-30.0, 35.0
H_ζ	3889.05	0.38	-20.0, 26.2	4.0	-31.8, 32.0
H_η	3835.38	0.37	-20.0, 14.6	4.0	-20.7, 21.8
H_θ	3797.90	0.37	-16.0, 16.0	3.9	-15.6, 16.7
H_ι	3770.63	0.36	-13.0, 13.0	3.9	-11.7, 11.6
He II 4686	4685.70	0.45	-11.9, 11.9	4.9	-15.0, 13.8
He II 5412	5411.52	0.52	-15.0, 15.0	5.6	-15.0, 15.0
He II 4542	4541.59	0.44	-15.0, 20.0	4.7	-20.0, 20.0
He II 4200	4199.84	0.41	-23.5, 33.8	4.3	-20.0, 20.0
He I 4472	4471.60	0.43	-15.0, 15.0	4.6	-15.0, 15.0
He I 4026	4026.29	0.39	-24.2, 15.0	4.2	-15.0, 15.0
He I 4922	4921.93	0.48	-15.0, 15.0	5.1	-15.0, 15.0

Spectral energy distribution

T_eff 45194 K · log g 6.241 · E(44−55) 0.080 · χ²_r 0.55 over 38 bands

distance 1675 pc · parallax 0.6000 ± 0.0500 mas (8%) · R 0.1228 +0.0105 −0.0089 R☉ · M 0.960 +0.213 −0.168 M☉ — above the 0.47 canonical mass · L 56.7 +10.1 −8.1 L☉

Photometry against the model, with the residual beneath it in units of the error. The horizontal bar on each point is the passband, not an error; a hollow point was not fitted and the tooltip says why. Drag a box to zoom, double-click or Esc to come back out.