J17391+1117

LAMOSTJ173906.41+111748.1  ·  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]27466 ± 144
log g5.528 ± 0.025
log n(He)/n(H)-2.794 ± 0.064
reduced χ²0.996 over 657 points
radial velocity-210.0 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 18:32:40

Fit — Lei (TLUSTY)

Teff [K]28430 ± 160
log g5.520 ± 0.020
log n(He)/n(H)-2.800 ± 0.060
gridsLei et al. 2018, ApJ 868, 70
SYNSPEC 49 spectra from NLTE TLUSTY 204 model atmospheres, through XTgrid

Observation

cosmic rays6 pixels cancelled
source filespec-56804-HD173550N120249V01_sp08-023.fits.gz

Gaia astrometry

Gaia DR3 source4492802221326659456
parallax [mas]1.7152 ± 0.0328
G13.282
Gabs4.482
μα [mas/yr]-4.994
μδ [mas/yr]-18.505
l, b35.116, 21.113

Published (Culpan et al. 2022)

class (Culpan)sdB
Teff [K]27867 ± 290
log g5.26 ± 0.03
log y-2.90 ± 0.04
reference2021ApJS..256...28L

Fitted lines

lineλ [Å]shift [Å]continuum at±avgfitted over
Hβ4861.32-3.41-40.0, 40.05.0-45.0, 45.0
Hγ4340.46-3.04-40.0, 36.84.5-43.0, 43.0
Hδ4101.73-2.87-40.0, 31.64.2-43.0, 43.0
Hε3970.07-2.78-28.0, 30.04.1-30.0, 35.0
Hζ3889.05-2.72-20.0, 26.24.0-31.8, 32.0
Hη3835.38-2.69-20.0, 14.64.0-20.7, 21.8
Hθ3797.90-2.66-16.0, 16.03.9-15.6, 16.7
Hι3770.63-2.64-13.0, 13.03.9-11.7, 11.6
Hκ3750.15-2.63-10.0, 10.03.9-7.4, 8.7
He II 46864685.70-3.28-11.9, 11.94.9-15.0, 13.8
He I 44724471.60-3.13-15.0, 15.04.6-15.0, 15.0
He I 40264026.29-2.82-24.2, 15.04.2-15.0, 15.0
He I 49224921.93-3.45-15.0, 15.05.1-15.0, 15.0