J22566+0656

PG2254+067  ·  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

profile fit on the Bamberg grid
Observed spectrum in black, model in red, offset by line. Balmer series left, helium right.

Results and provenance

Fit — Bamberg

Teff [K]28974 ± 237
log g5.707 ± 0.037
log n(He)/n(H)-2.710 ± 0.076
reduced χ²1.012 over 639 points
radial velocity-161.0 km s−1
resolution (FWHM)2.50 Å
lines fitted12
gridsHE-0.041.fits
HE-0.125.fits
HE-0.300.fits
HE-0.550.fits
+9 more
fitted04/09/2026 18:34:07

Fit — Lei (TLUSTY)

Teff [K]29920 ± 270
log g5.650 ± 0.050
log n(He)/n(H)-2.790 ± 0.130
gridsLei et al. 2018, ApJ 868, 70
SYNSPEC 49 spectra from NLTE TLUSTY 204 model atmospheres, through XTgrid

Observation

source filespec-56956-EG224840N075042M01_sp06-208.fits.gz

Gaia astrometry

Gaia DR3 source2712047826225618048
parallax [mas]0.9061 ± 0.0492
G15.238
Gabs5.083
μα [mas/yr]-4.525
μδ [mas/yr]-3.049
l, b79.566, -46.035

Published (Culpan et al. 2022)

class (Culpan)sdB+WD
class (SIMBAD)sdB
Teff [K]28500 ± 500
log g5.64 ± 0.05
log y-2.30 ± 0.20
reference2015A&A...577A..26G

Fitted lines

lineλ [Å]shift [Å]continuum at±avgfitted over
Hβ4861.32-2.61-40.0, 40.05.0-45.0, 45.0
Hγ4340.46-2.33-40.0, 36.84.5-43.0, 43.0
Hδ4101.73-2.20-40.0, 31.64.2-43.0, 43.0
Hε3970.07-2.13-28.0, 30.04.1-30.0, 35.0
Hζ3889.05-2.09-20.0, 26.24.0-31.8, 32.0
Hη3835.38-2.06-20.0, 14.64.0-20.7, 21.8
Hθ3797.90-2.04-16.0, 16.03.9-15.6, 16.7
Hι3770.63-2.02-13.0, 13.03.9-11.7, 11.6
He II 46864685.70-2.52-11.9, 11.94.9-15.0, 13.8
He I 44724471.60-2.40-15.0, 15.04.6-15.0, 15.0
He I 40264026.29-2.16-24.2, 15.04.2-15.0, 15.0
He I 49224921.93-2.64-15.0, 15.05.1-15.0, 15.0