J17483+2345

Culpan hotsd

χ²/N = 0.98

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]	53078 ± 1369
log g	5.888 ± 0.072
log n(He)/n(H)	-2.005 ± 0.088
reduced χ²	0.984 over 743 points
radial velocity	-54.0 km s⁻¹
resolution (FWHM)	2.50 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 18:32:44

Observation

source file

spec-59732-HD174640N254456B02_sp01-236.fits.gz

Gaia astrometry

Gaia DR3 source	4580614133364056448
parallax [mas]	0.6070 ± 0.0388
G	15.581
BP − RP	-0.434
G_abs	4.497
μ_α [mas/yr]	-2.588
μ_δ [mas/yr]	2.246
RUWE	1.007
l, b	48.490, 23.901
selection	f_plx

Fitted lines

line	λ [Å]	shift [Å]	continuum at	±avg	fitted over
H_β	4861.32	-0.88	-40.0, 40.0	5.0	-45.0, 45.0
H_γ	4340.46	-0.78	-40.0, 36.8	4.5	-43.0, 43.0
H_δ	4101.73	-0.74	-40.0, 31.6	4.2	-43.0, 43.0
H_ε	3970.07	-0.72	-28.0, 30.0	4.1	-30.0, 35.0
H_ζ	3889.05	-0.70	-20.0, 26.2	4.0	-31.8, 32.0
H_η	3835.38	-0.69	-20.0, 14.6	4.0	-20.7, 21.8
H_θ	3797.90	-0.68	-16.0, 16.0	3.9	-15.6, 16.7
H_ι	3770.63	-0.68	-13.0, 13.0	3.9	-11.7, 11.6
He II 4686	4685.70	-0.84	-11.9, 11.9	4.9	-15.0, 13.8
He II 5412	5411.52	-0.97	-15.0, 15.0	5.6	-15.0, 15.0
He II 4542	4541.59	-0.82	-15.0, 20.0	4.7	-20.0, 20.0
He II 4200	4199.84	-0.76	-23.5, 33.8	4.3	-20.0, 20.0
He I 4472	4471.60	-0.81	-15.0, 15.0	4.6	-15.0, 15.0
He I 4026	4026.29	-0.73	-24.2, 15.0	4.2	-15.0, 15.0
He I 4922	4921.93	-0.89	-15.0, 15.0	5.1	-15.0, 15.0