J08392+1037

SDSSJ083917.97+103753.3  ·  Culpan knownhsd

χ²/N = 1.00

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]26056 ± 181
log g5.542 ± 0.029
log n(He)/n(H)-2.745 ± 0.036
reduced χ²1.002 over 659 points
radial velocity-131.0 km s−1
resolution (FWHM)2.50 Å
lines fitted13
gridsHE-0.041.fits
HE-0.125.fits
HE-0.300.fits
HE-0.550.fits
+9 more
fitted04/09/2026 18:29:19

Fit — Lei (TLUSTY)

Teff [K]27030 ± 280
log g5.520 ± 0.030
log n(He)/n(H)-2.730 ± 0.070
gridsLei et al. 2019, ApJ 881, 135
SYNSPEC 49 spectra from NLTE TLUSTY 204 model atmospheres, through XTgrid

Observation

source filespec-57425-KP084656N120635B01_sp02-086.fits.gz

Gaia astrometry

Gaia DR3 source601444306482580992
parallax [mas]0.6853 ± 0.0504
G15.165
Gabs4.426
μα [mas/yr]-6.281
μδ [mas/yr]2.951
l, b215.483, 28.735

Published (Culpan et al. 2022)

class (Culpan)sdB
Teff [K]27686 ± 277
log g5.52 ± 0.03
log y-2.81 ± 0.05
reference2021ApJS..256...28L

Fitted lines

lineλ [Å]shift [Å]continuum at±avgfitted over
Hβ4861.32-2.12-40.0, 40.05.0-45.0, 45.0
Hγ4340.46-1.90-40.0, 36.84.5-43.0, 43.0
Hδ4101.73-1.79-40.0, 31.64.2-43.0, 43.0
Hε3970.07-1.73-28.0, 30.04.1-30.0, 35.0
Hζ3889.05-1.70-20.0, 26.24.0-31.8, 32.0
Hη3835.38-1.68-20.0, 14.64.0-20.7, 21.8
Hθ3797.90-1.66-16.0, 16.03.9-15.6, 16.7
Hι3770.63-1.65-13.0, 13.03.9-11.7, 11.6
Hκ3750.15-1.64-10.0, 10.03.9-7.4, 8.7
He II 46864685.70-2.05-11.9, 11.94.9-15.0, 13.8
He I 44724471.60-1.95-15.0, 15.04.6-15.0, 15.0
He I 40264026.29-1.76-24.2, 15.04.2-15.0, 15.0
He I 49224921.93-2.15-15.0, 15.05.1-15.0, 15.0