J17126+5625

PG1711+565 · 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]	51863 ± 1657
log g	5.830 ± 0.081
log n(He)/n(H)	-2.782 ± 0.379
reduced χ²	0.991 over 745 points
radial velocity	13.0 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 19:09:53

Observation

cosmic rays	7 pixels cancelled
source file	spec-101143-60063-27021597904639878.fits

Gaia astrometry

Gaia DR3 source	1432782883580373504
parallax [mas]	0.3208 ± 0.0426
G	16.010
G_abs	3.532
μ_α [mas/yr]	-0.727
μ_δ [mas/yr]	-1.215
l, b	84.622, 35.847

Published (Culpan et al. 2022)

class (Culpan)	sdB
class (SIMBAD)	sdB

Fitted lines

line	λ [Å]	shift [Å]	continuum at	±avg	fitted over
H_β	4861.32	0.21	-40.0, 40.0	5.0	-45.0, 45.0
H_γ	4340.46	0.19	-40.0, 36.8	4.5	-43.0, 43.0
H_δ	4101.73	0.18	-40.0, 31.6	4.2	-43.0, 43.0
H_ε	3970.07	0.17	-28.0, 30.0	4.1	-30.0, 35.0
H_ζ	3889.05	0.17	-20.0, 26.2	4.0	-31.8, 32.0
H_η	3835.38	0.17	-20.0, 14.6	4.0	-20.7, 21.8
H_θ	3797.90	0.16	-16.0, 16.0	3.9	-15.6, 16.7
H_ι	3770.63	0.16	-13.0, 13.0	3.9	-11.7, 11.6
He II 4686	4685.70	0.20	-11.9, 11.9	4.9	-15.0, 13.8
He II 5412	5411.52	0.23	-15.0, 15.0	5.6	-15.0, 15.0
He II 4542	4541.59	0.20	-15.0, 20.0	4.7	-20.0, 20.0
He II 4200	4199.84	0.18	-23.5, 33.8	4.3	-20.0, 20.0
He I 4472	4471.60	0.19	-15.0, 15.0	4.6	-15.0, 15.0
He I 4026	4026.29	0.17	-24.2, 15.0	4.2	-15.0, 15.0
He I 4922	4921.93	0.21	-15.0, 15.0	5.1	-15.0, 15.0

Spectral energy distribution

Component 1, the subdwarf: T_eff 51863 K (held) · log g 5.830 (held) · R 0.1550 R☉ (fitted, with the companion) · χ²_r 0.58 over 35 bands

E(44−55) 0.018 (held)

Component 2, the companion: T_eff 5125 K (fitted, 3500–8750 K grid) · log g 4.50 (held) · R 0.8249 R☉ (fitted) · χ²_r 0.12 for the two components together (Δχ² 324 over one star, same bands)

The dashed curves beneath the model are the two components of this fit: the subdwarf alone and the cool companion.

distance 3117 pc · parallax 0.3200 ± 0.0400 mas (12%) · M 1.047 +0.383 −0.255 M☉ — above the 0.47 canonical mass · (from the ONE-star scale -- not corrected for the companion's light) · L 276.6 +91.6 −61.8 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.