J22450+3221

HS2242+3206  ·  Culpan knownhsd

χ²/N = 0.95

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]29639 ± 131
log g5.734 ± 0.018
log n(He)/n(H)-2.734 ± 0.060
reduced χ²0.950 over 637 points
radial velocity-50.0 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 18:34:03

Fit — Lei (TLUSTY)

Teff [K]31020 ± 240
log g5.700 ± 0.040
log n(He)/n(H)-2.740 ± 0.120
gridsLei et al. 2020, ApJ 889, 117
SYNSPEC 49 spectra from NLTE TLUSTY 204 model atmospheres, through XTgrid

Observation

cosmic rays27 pixels cancelled
source filespec-58404-GACII342N32M1_sp03-235.fits.gz

Gaia astrometry

Gaia DR3 source1890677009230168704
parallax [mas]1.4322 ± 0.0292
G13.979
Gabs4.791
μα [mas/yr]24.082
μδ [mas/yr]-1.268
l, b94.118, -23.343

Published (Culpan et al. 2022)

class (Culpan)sdB
class (SIMBAD)sdB
Teff [K]31010 ± 47
log g5.71 ± 0.01
log y-2.87 ± 0.04
reference2021ApJS..256...28L

Fitted lines

lineλ [Å]shift [Å]continuum at±avgfitted over
Hβ4861.32-0.81-40.0, 40.05.0-45.0, 45.0
Hγ4340.46-0.72-40.0, 36.84.5-43.0, 43.0
Hδ4101.73-0.68-40.0, 31.64.2-43.0, 43.0
Hε3970.07-0.66-28.0, 30.04.1-30.0, 35.0
Hζ3889.05-0.65-20.0, 26.24.0-31.8, 32.0
Hη3835.38-0.64-20.0, 14.64.0-20.7, 21.8
Hθ3797.90-0.63-16.0, 16.03.9-15.6, 16.7
Hι3770.63-0.63-13.0, 13.03.9-11.7, 11.6
He II 46864685.70-0.78-11.9, 11.94.9-15.0, 13.8
He I 44724471.60-0.75-15.0, 15.04.6-15.0, 15.0
He I 40264026.29-0.67-24.2, 15.04.2-15.0, 15.0
He I 49224921.93-0.82-15.0, 15.05.1-15.0, 15.0