J14349+0854sdB

PG1432+091 · 14:34:58.49 08:54:25.78 · Culpan knownhsd

χ²/N = 1.01

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.

Line-profile fit — uli

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

Results and provenance

Fit — Bamberg

T_eff [K]	24673 ± 181
log g	5.705 ± 0.023
log n(He)/n(H)	-4.761 ± 2.488
reduced χ²	1.012 over 657 points
radial velocity	-40.0 km s⁻¹
resolution (FWHM)	2.00 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 19:09:11

Fit — uli

T_eff [K]	24574 ± 192
log g	5.602 ± 0.025
log n(He)/n(H)	-3.361 ± 0.057 upper limit
reduced χ²	1.009 over 657 points
radial velocity	-40.0 km s⁻¹
resolution (FWHM)	2.00 Å
lines fitted	13
grids	h909.grid h97.grid h99.grid h999.grid
settled	outside the grid
fitted	04/09/2026 18:36:03

Observation

telescope	SDSS 2.5-M
survey / programme	boss
date	2012-02-16
exposure	6306 s in 14
pipeline	v5_13_2
S/N (classifier)	69.4
source file	spec-5467-55973-0698.fits

Gaia astrometry

Gaia DR3 source	1173045457908931072
parallax [mas]	0.5771 ± 0.0545
G	16.348
G_abs	5.161
μ_α [mas/yr]	1.051
μ_δ [mas/yr]	-1.096
l, b	1.124, 59.502

Published (Culpan et al. 2022)

class (Culpan)	sdB
class (SIMBAD)	sdB

Classifier

AGREES

auto: contrast 0.15, within the 0.35 a subdwarf reaches at 25 kK, Mg I b suggests a companion but Ca II does not (0.2 sigma)

Fitted lines

line	λ [Å]	shift [Å]	continuum at	±avg	fitted over
H_β	4861.32	-0.65	-40.0, 40.0	5.0	-45.0, 45.0
H_γ	4340.46	-0.58	-40.0, 36.8	4.5	-43.0, 43.0
H_δ	4101.73	-0.55	-40.0, 31.6	4.2	-43.0, 43.0
H_ε	3970.07	-0.53	-28.0, 30.0	4.1	-30.0, 35.0
H_ζ	3889.05	-0.52	-20.0, 26.2	4.0	-31.8, 32.0
H_η	3835.38	-0.51	-20.0, 14.6	4.0	-20.7, 21.8
H_θ	3797.90	-0.51	-16.0, 16.0	3.9	-15.6, 16.7
H_ι	3770.63	-0.50	-13.0, 13.0	3.9	-11.7, 11.6
H_κ	3750.15	-0.50	-10.0, 10.0	3.9	-7.4, 8.7
He II 4686	4685.70	-0.63	-11.9, 11.9	4.9	-15.0, 13.8
He I 4472	4471.60	-0.60	-15.0, 15.0	4.6	-15.0, 15.0
He I 4026	4026.29	-0.54	-24.2, 15.0	4.2	-15.0, 15.0
He I 4922	4921.93	-0.66	-15.0, 15.0	5.1	-15.0, 15.0

Spectral energy distribution

T_eff 24673 K · log g 5.705 · E(44−55) 0.008 · χ²_r 0.20 over 35 bands

distance 1733 pc · parallax 0.5800 ± 0.0500 mas (9%) · R 0.1434 +0.0150 −0.0124 R☉ · M 0.381 +0.099 −0.074 M☉ · L 6.9 +1.5 −1.2 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.