J05251+1757

LAMOSTJ052508.76+175713.7  ·  Culpan knownhsd

χ²/N = 0.98

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]36494 ± 408
log g5.837 ± 0.048
log n(He)/n(H)-2.117 ± 0.078
reduced χ²0.980 over 637 points
radial velocity-86.0 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 18:26:56

Fit — Lei (TLUSTY)

Teff [K]34810 ± 540
log g5.680 ± 0.090
log n(He)/n(H)-2.300 ± 0.090
gridsLei et al. 2019, ApJ 881, 135
SYNSPEC 49 spectra from NLTE TLUSTY 204 model atmospheres, through XTgrid

Observation

cosmic rays2 pixels cancelled
source filespec-57319-GAC081N15B1_sp16-146.fits.gz

Gaia astrometry

Gaia DR3 source3400347392320018176
parallax [mas]0.9513 ± 0.0478
G15.649
Gabs5.628
μα [mas/yr]3.335
μδ [mas/yr]4.636
l, b186.809, -9.831

Published (Culpan et al. 2022)

class (Culpan)sdB
Teff [K]36100 ± 142
log g5.73 ± 0.03
log y-2.31 ± 0.05
reference2021ApJS..256...28L

Fitted lines

lineλ [Å]shift [Å]continuum at±avgfitted over
Hβ4861.32-1.39-40.0, 40.05.0-45.0, 45.0
Hγ4340.46-1.25-40.0, 36.84.5-43.0, 43.0
Hδ4101.73-1.18-40.0, 31.64.2-43.0, 43.0
Hε3970.07-1.14-28.0, 30.04.1-30.0, 35.0
Hζ3889.05-1.12-20.0, 26.24.0-31.8, 32.0
Hη3835.38-1.10-20.0, 14.64.0-20.7, 21.8
Hθ3797.90-1.09-16.0, 16.03.9-15.6, 16.7
Hι3770.63-1.08-13.0, 13.03.9-11.7, 11.6
He II 46864685.70-1.34-11.9, 11.94.9-15.0, 13.8
He I 44724471.60-1.28-15.0, 15.04.6-15.0, 15.0
He I 40264026.29-1.16-24.2, 15.04.2-15.0, 15.0
He I 49224921.93-1.41-15.0, 15.05.1-15.0, 15.0