J02547+0916

LAMOSTJ025445.45+091630.3  ·  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]29047 ± 643
log g5.366 ± 0.086
log n(He)/n(H)-3.888 ± 1.541
reduced χ²1.000 over 636 points
radial velocity-187.0 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 18:26:02

Fit — Lei (TLUSTY)

Teff [K]29370 ± 270
log g5.650 ± 0.050
log n(He)/n(H)-3.000 ± 0.000
gridsLei et al. 2019, ApJ 881, 135
SYNSPEC 49 spectra from NLTE TLUSTY 204 model atmospheres, through XTgrid
heliumpublished as a limit

Observation

source filespec-57308-EG025613N082253M01_sp15-189.fits.gz

Gaia astrometry

Gaia DR3 source20948346504556160
parallax [mas]0.3469 ± 0.1631
G17.667
μα [mas/yr]4.367
μδ [mas/yr]-4.598
l, b166.600, -42.902

Published (Culpan et al. 2022)

class (Culpan)sdB
Teff [K]30274 ± 292
log g5.43 ± 0.05
log y-3.51 ± 0.33
reference2021ApJS..256...28L

Fitted lines

lineλ [Å]shift [Å]continuum at±avgfitted over
Hβ4861.32-3.03-40.0, 40.05.0-45.0, 45.0
Hγ4340.46-2.71-40.0, 36.84.5-43.0, 43.0
Hδ4101.73-2.56-40.0, 31.64.2-43.0, 43.0
Hε3970.07-2.48-28.0, 30.04.1-30.0, 35.0
Hζ3889.05-2.43-20.0, 26.24.0-31.8, 32.0
Hη3835.38-2.39-20.0, 14.64.0-20.7, 21.8
Hθ3797.90-2.37-16.0, 16.03.9-15.6, 16.7
Hι3770.63-2.35-13.0, 13.03.9-11.7, 11.6
He II 46864685.70-2.92-11.9, 11.94.9-15.0, 13.8
He I 44724471.60-2.79-15.0, 15.04.6-15.0, 15.0
He I 40264026.29-2.51-24.2, 15.04.2-15.0, 15.0
He I 49224921.93-3.07-15.0, 15.05.1-15.0, 15.0