J22475+3119

SDSSJ224733.66+311932.9  ·  Culpan knownhsd

χ²/N = 0.97

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]28248 ± 231
log g5.570 ± 0.037
log n(He)/n(H)-2.527 ± 0.066
reduced χ²0.970 over 639 points
radial velocity-72.0 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 18:34:04

Fit — Lei (TLUSTY)

Teff [K]28940 ± 240
log g5.550 ± 0.040
log n(He)/n(H)-2.630 ± 0.120
gridsLei et al. 2018, ApJ 868, 70
SYNSPEC 49 spectra from NLTE TLUSTY 204 model atmospheres, through XTgrid

Observation

source filespec-56973-HD224534N302633B01_sp09-113.fits.gz

Gaia astrometry

Gaia DR3 source1889631201873127424
parallax [mas]0.6733 ± 0.0419
G15.430
Gabs4.618
μα [mas/yr]-4.242
μδ [mas/yr]-4.341
l, b94.045, -24.507

Published (Culpan et al. 2022)

class (Culpan)sdB
class (SIMBAD)sdB0.5He7
Teff [K]28099 ± 1079
log g5.49 ± 0.16
log y-2.20 ± 0.20
reference2017OAst...26..164G

Fitted lines

lineλ [Å]shift [Å]continuum at±avgfitted over
Hβ4861.32-1.17-40.0, 40.05.0-45.0, 45.0
Hγ4340.46-1.04-40.0, 36.84.5-43.0, 43.0
Hδ4101.73-0.99-40.0, 31.64.2-43.0, 43.0
Hε3970.07-0.95-28.0, 30.04.1-30.0, 35.0
Hζ3889.05-0.93-20.0, 26.24.0-31.8, 32.0
Hη3835.38-0.92-20.0, 14.64.0-20.7, 21.8
Hθ3797.90-0.91-16.0, 16.03.9-15.6, 16.7
Hι3770.63-0.91-13.0, 13.03.9-11.7, 11.6
He II 46864685.70-1.13-11.9, 11.94.9-15.0, 13.8
He I 44724471.60-1.07-15.0, 15.04.6-15.0, 15.0
He I 40264026.29-0.97-24.2, 15.04.2-15.0, 15.0
He I 49224921.93-1.18-15.0, 15.05.1-15.0, 15.0